From joost at sanguis.xs4all.nl Tue Dec 2 08:08:57 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Tue, 02 Dec 2008 14:08:57 +0100 Subject: [Retros] Die Schwalbe Heft 234, Nov-Dec 2008 Message-ID: <49353369.3040703@sanguis.xs4all.nl> This issue starts with a long article by G?nther Weeth about (de-)legalizing moves in anticirce proca retractors. One original in this article: G?nther Weeth 7B/7p/3s3k/6P1/b4pK1/3pp3/2PP1bSP/7R (8+8) +---+---+---+---+---+---+---+---+ | | . | | . | | . | | B | +---+---+---+---+---+---+---+---+ | . | | . | | . | | . |*P | +---+---+---+---+---+---+---+---+ | | . | |*S | | . | |*K | +---+---+---+---+---+---+---+---+ | . | | . | | . | | P | | +---+---+---+---+---+---+---+---+ |*B | . | | . | |*P | K | . | +---+---+---+---+---+---+---+---+ | . | | . |*P |*P | | . | | +---+---+---+---+---+---+---+---+ | | . | P | P | |*B | S | P | +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | R | +---+---+---+---+---+---+---+---+ -6 & s#1, Proca, Anticirce -1. Rh1xBd1[+wRh1]! (Delegalises -3. .. Kg7-h6 by blocking the path of the white rook to c1) Sc8-d6+ -2. Re1xQe2[+wRh1] (Legalises the next white move by blocking the rebirth square) Qf1-e2+ -3. Kh5-g4 (-3. .. Kg7-h6? Rc1-e1??) Be8-a4 -4. Kh4-h5 Bg1-f2 -5. Kg3-h4 f5-f4 -6. Sf4-g2 & 1. h4+ Bh2# And there's an article about the Schwalbe meeting in Oestrich-Winkel (4 oct 2008). There was a composition tourney with theme "At least one fairy battery with rear piece king, knight or pawn is fired". Battery: "Piece X (front piece) moves, which results in a check by piece Y (rear piece)". Klaus Wenda Hon. mention Oestrich-Winkel 2008 s1s5/5S1S/4k3/8/8/4p1p1/3r2K1/1Q2b3 (4+7) +---+---+---+---+---+---+---+---+ |*S | . |*S | . | | . | | . | +---+---+---+---+---+---+---+---+ | . | | . | | . | S | . | S | +---+---+---+---+---+---+---+---+ | | . | | . |*K | . | | . | +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | | +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | +---+---+---+---+---+---+---+---+ | . | | . | |*P | |*P | | +---+---+---+---+---+---+---+---+ | | . | |*R | | . | K | . | +---+---+---+---+---+---+---+---+ | . | Q | . | |*B | | . | | +---+---+---+---+---+---+---+---+ -5 & #1, Proca, Anticirce -1. Kf2-g2 e2-e1=B -2. Sd8-f7 Kf7-e6 -3. Kf1-f2 Kg8-f7 -4. Se6-d8 Rd8-d2 -5. Sf6-h7 & 1. Qh7# And the usual stuff (13940 may be misprinted, since white is in check in diagram B) : 13940 - Arno T?ngler A: ss1b4/p3P3/2PrRr2/ssrkBRP1/1Kb2q2/P2PrP2/1r6/1Bs3b1 (11+16) B: ss6/4P3/2PrRr2/2rkBRP1/1Kb2q2/P2PrP2/1r6/1Bs3b1 (11+12) +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ |*S |*S | |*B | | . | | . | |*S |*S | | . | | . | | . | +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ |*P | | . | | P | | . | | | . | | . | | P | | . | | +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ | | . | P |*R | R |*R | | . | | | . | P |*R | R |*R | | . | +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ |*S |*S |*R |*K | B | R | P | | | . | |*R |*K | B | R | P | | +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ | | K |*B | . | |*Q | | . | | | K |*B | . | |*Q | | . | +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ | P | | . | P |*R | P | . | | | P | | . | P |*R | P | . | | +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ | |*R | | . | | . | | . | | |*R | | . | | . | | . | +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ | . | B |*S | | . | |*B | | | . | B |*S | | . | |*B | | +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ ser-A->B 320 13941 - Thierry le Gleuher k4b1s/pppRpp1b/3p2p1/5pK1/5P1S/3P1P1B/PPP2PPB/4Sr2 (14+13) +---+---+---+---+---+---+---+---+ |*K | . | | . | |*B | |*S | +---+---+---+---+---+---+---+---+ |*P |*P |*P | R |*P |*P | . |*B | +---+---+---+---+---+---+---+---+ | | . | |*P | | . |*P | . | +---+---+---+---+---+---+---+---+ | . | | . | | . |*P | K | | +---+---+---+---+---+---+---+---+ | | . | | . | | P | | S | +---+---+---+---+---+---+---+---+ | . | | . | P | . | P | . | B | +---+---+---+---+---+---+---+---+ | P | P | P | . | | P | P | B | +---+---+---+---+---+---+---+---+ | . | | . | | S |*R | . | | +---+---+---+---+---+---+---+---+ #1 (Who?) 13942 - Roberto Osorio, Jorge Joaquin Lois rs4s1/p2Q2pp/p1p1p1k1/2p1Pp2/8/b1PB1b2/P1P2BPP/RS2K1SR (14+14) +---+---+---+---+---+---+---+---+ |*R |*S | | . | | . |*S | . | +---+---+---+---+---+---+---+---+ |*P | | . | Q | . | |*P |*P | +---+---+---+---+---+---+---+---+ |*P | . |*P | . |*P | . |*K | . | +---+---+---+---+---+---+---+---+ | . | |*P | | P |*P | . | | +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | +---+---+---+---+---+---+---+---+ |*B | | P | B | . |*B | . | | +---+---+---+---+---+---+---+---+ | P | . | P | . | | B | P | P | +---+---+---+---+---+---+---+---+ | R | S | . | | K | | S | R | +---+---+---+---+---+---+---+---+ Proofgame in 20.0 13943 - Bernd Gr?frath r1b2bsr/pp4pp/8/4s3/4p3/8/PPPPPP2/RSBQR1S1 (12+11) +---+---+---+---+---+---+---+---+ |*R | . |*B | . | |*B |*S |*R | +---+---+---+---+---+---+---+---+ |*P |*P | . | | . | |*P |*P | +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | +---+---+---+---+---+---+---+---+ | . | | . | |*S | | . | | +---+---+---+---+---+---+---+---+ | | . | | . |*P | . | | . | +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | | +---+---+---+---+---+---+---+---+ | P | P | P | P | P | P | | . | +---+---+---+---+---+---+---+---+ | R | S | B | Q | R | | S | | +---+---+---+---+---+---+---+---+ Proofgame in 10.5 (Losing chess) 13944 - Bernd Gr?frath 2b1kbsr/1pp1pppp/8/8/8/2Pq1Q2/PP2PPPP/RSBrKBSR (15+13) +---+---+---+---+---+---+---+---+ | | . |*B | . |*K |*B |*S |*R | +---+---+---+---+---+---+---+---+ | . |*P |*P | |*P |*P |*P |*P | +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | | +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | +---+---+---+---+---+---+---+---+ | . | | P |*Q | . | Q | . | | +---+---+---+---+---+---+---+---+ | P | P | | . | P | P | P | P | +---+---+---+---+---+---+---+---+ | R | S | B |*R | K | B | S | R | +---+---+---+---+---+---+---+---+ Proofgame in 9.0 (Bichromatic chess) b) Qd3->d6 13945 - Unto Heinonen RSBQKBSR/1pp2ppk/7s/3p3s/8/1P3P2/P1PP3P/8 (14+8) +---+---+---+---+---+---+---+---+ | R | S | B | Q | K | B | S | R | +---+---+---+---+---+---+---+---+ | . |*P |*P | | . |*P |*P |*K | +---+---+---+---+---+---+---+---+ | | . | | . | | . | |*S | +---+---+---+---+---+---+---+---+ | . | | . |*P | . | | . |*S | +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | +---+---+---+---+---+---+---+---+ | . | P | . | | . | P | . | | +---+---+---+---+---+---+---+---+ | P | . | P | P | | . | | P | +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | | +---+---+---+---+---+---+---+---+ Proofgame in 16.0 (Mirror-anticirce) 13946 - G?nther Weeth Dedicated to J?rgen Bischoff (+ 4.6.08) 1q2R3/BP5r/k4p2/p7/2P1B3/2PKp3/p3p3/4S2R (9+8) +---+---+---+---+---+---+---+---+ | |*Q | | . | R | . | | . | +---+---+---+---+---+---+---+---+ | B | P | . | | . | | . |*R | +---+---+---+---+---+---+---+---+ |*K | . | | . | |*P | | . | +---+---+---+---+---+---+---+---+ |*P | | . | | . | | . | | +---+---+---+---+---+---+---+---+ | | . | P | . | B | . | | . | +---+---+---+---+---+---+---+---+ | . | | P | K |*P | | . | | +---+---+---+---+---+---+---+---+ |*P | . | | . |*P | . | | . | +---+---+---+---+---+---+---+---+ | . | | . | | S | | . | R | +---+---+---+---+---+---+---+---+ -3 & s#1, Proca, Anticirce 13947 - Alain Brobecker Find the unique game in monochromatic chess that ends with 5. Qc6-e8# 13948 - Alain Brobecker Find the unique game in monochromatic chess that ends with 5. .. Be7xPd6# 13949 - Werner Keym Find an illegal cluster with wKRPPPP/wK. In one of the sub-positions that arise when a piece is removed, the last 2 single moves are exactly determined. 13950 - Werner Keym Find an illegal cluster with both kings and a white piece, in which the distance of the kings to their original squares is second-largest. Fairy definitions and examples: Mirror-anticirce: The capturing piece is reborn on the anticirce rebirth square of the opposite colour (e.g., in anticirce, a white bishop capturing on d3 is reborn on f1, in Mirror-anticirce it is reborn on c8). Bichromatic chess: The departure- and arrivalsquare of a move must be on a differently coloured square. E.g. bishops can't move, pawn captures and castling are illegal. Checks are 'fairy', e.g. wRd8 bKf8 isn't check, but white can deliver check with 1. Ra8. Monochromatic chess: The departure- and arrivalsquare of a move must be on a same coloured square. Checks are 'fairy'. E.g. knights can't move, long castling is illegal, and Ra1 can never give check to the black king. From joost at sanguis.xs4all.nl Tue Dec 2 10:32:29 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Tue, 02 Dec 2008 16:32:29 +0100 Subject: [Retros] Die Schwalbe Heft 234, Nov-Dec 2008 In-Reply-To: <49353369.3040703@sanguis.xs4all.nl> References: <49353369.3040703@sanguis.xs4all.nl> Message-ID: <4935550D.1010309@sanguis.xs4all.nl> Joost de Heer schreef: > 13947 - Alain Brobecker > Find the unique game in monochromatic chess that ends with 5. Qc6-e8# > > 13948 - Alain Brobecker > Find the unique game in monochromatic chess that ends with 5. .. Be7xPd6# Mistranslation 13947 - Alain Brobecker Which exact proofgame in monochromatic chess ends with 5. Qc6-e8#? 13948 - Alain Brobecker Which exact proofgame in monochromatic chess ends with 5. .. Be7xPd6#? From joost at sanguis.xs4all.nl Tue Dec 2 17:41:40 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Tue, 02 Dec 2008 23:41:40 +0100 Subject: [Retros] Die Schwalbe Heft 234, Nov-Dec 2008 In-Reply-To: <49353369.3040703@sanguis.xs4all.nl> References: <49353369.3040703@sanguis.xs4all.nl> Message-ID: <4935B9A4.20100@sanguis.xs4all.nl> > 13949 - Werner Keym > Find an illegal cluster with wKRPPPP/wK. In one of the sub-positions > that arise when a piece is removed, the last 2 single moves are exactly > determined. That should be wKRPPPP/bK, of course. > 13950 - Werner Keym > Find an illegal cluster with both kings and a white piece, in which the > distance of the kings to their original squares is second-largest. And this should read ".. in which the sum of the distances of the kings to their original squares is second-largest." Joost From w.keym at gmx.net Tue Dec 2 18:06:08 2008 From: w.keym at gmx.net (Werner Keym) Date: Wed, 3 Dec 2008 00:06:08 +0100 Subject: [Retros] Die Schwalbe Heft 234, Nov-Dec 2008 In-Reply-To: <4935B9A4.20100@sanguis.xs4all.nl> Message-ID: Danke WK -----Urspr?ngliche Nachricht----- Von: retros-bounces at janko.at [mailto:retros-bounces at janko.at]Im Auftrag von Joost de Heer Gesendet: Dienstag, 2. Dezember 2008 23:42 An: The Retrograde Analysis Mailing List Betreff: Re: [Retros] Die Schwalbe Heft 234, Nov-Dec 2008 > 13949 - Werner Keym > Find an illegal cluster with wKRPPPP/wK. In one of the sub-positions > that arise when a piece is removed, the last 2 single moves are exactly > determined. That should be wKRPPPP/bK, of course. > 13950 - Werner Keym > Find an illegal cluster with both kings and a white piece, in which the > distance of the kings to their original squares is second-largest. And this should read ".. in which the sum of the distances of the kings to their original squares is second-largest." Joost _______________________________________________ Retros mailing list Retros at janko.at http://www.pairlist.net/mailman/listinfo/retros No virus found in this incoming message. Checked by AVG. Version: 7.5.552 / Virus Database: 270.9.12/1823 - Release Date: 01.12.08 19:59 No virus found in this outgoing message. Checked by AVG. Version: 7.5.552 / Virus Database: 270.9.12/1823 - Release Date: 01.12.08 19:59 From joost at sanguis.xs4all.nl Tue Dec 2 18:19:30 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Wed, 03 Dec 2008 00:19:30 +0100 Subject: [Retros] Probleemblad 2005 In-Reply-To: <000301c91729$1434c370$3900a8c0@ww300.siemens.net> References: <000301c91729$1434c370$3900a8c0@ww300.siemens.net> Message-ID: <4935C282.9090509@sanguis.xs4all.nl> Probleemblad 2005 is still missing from the retro corner. Here are the originals from those issues. Hope I didn't make too many typing errors.... Probleemblad 1-2005 (Jan-Feb) R268 - Unto Heinonen rsbq1b2/ppppp3/5p1s/7p/P5rk/1P1P4/1P3PP1/SBQKBSRR (14+15) SPG 18.5 R269 - Jorge Lois, Roberto Osorio rsbq1b2/1p1pp1p1/1k3pr1/2p3ps/4BBQ1/1P1PPP2/1PP4P/RSR1S1K1 (15+15) SPG 20.0 R270 - Martin van Essen 8/8/5pP1/8/2S2k1p/5p1P/5SPK/6BR (8+4) -1 & s#1 R271 - Roberto Osorio 1rbqks1r/pppppppp/4S3/8/8/8/PPPPPPPP/SRBQKB1R (16+14) -3 & #1, Proca retractor, Relay chess with retroanalysis R272 - Klaus Wenda 2bB4/2P3S1/1P1k3b/8/8/6r1/8/4K3 (5+4) -4 & #1, Proca retractor, Anticirce R273 - Wolfgang Dittmann 8/8/2kr1P2/3b3B/3p3p/2P2PB1/P1K2R1p/1S6 (9+6) -5 & #1, Proca retractor, Anticirce Probleemblad 2-2005 (Mar-Apr) R274 - Francois Labelle, Joost de Heer rsbqkbsr/pp1p1ppp/8/8/8/8/PP1P1PPP/RSBQKBSR (14+14) SPG 7.0 (2 solutions) R275 - Mario Parrinello 2b3B1/1pspk2p/1p1p1r2/2pr4/5p1s/1P2P3/1PP1PP2/1SBQK1SR (13+13) SPG 19.5 R276 - Jorge Lois, Roberto Osorio rsbqkbsr/pppppppp/B1Q5/8/P3P3/2S5/3PKPPP/RSB4R (14+16) Exact proofgame in 15.0, Andernach chess Probleemblad 3-2005 (May-Jun) R277 - Peter van den Heuvel r1bqk3/ppppbpRp/8/8/8/8/P1P1PPPP/1r1QKBSR (12+12) SPG 10.0 R278 - Unto Heinonen In memoriam Jan Hannelius 2b1k3/2p1s2P/s1rpp2Q/p1q1p3/1br1p3/7B/1PPP1P1P/1SB1K1SR (13+14) SPG 17.0 R279 - Michel Caillaud 3sb3/2qrspp1/3k4/2pp3r/8/6b1/1P2PPPp/RSBQKBSR (12+13) SPG 19.5 R280 - Michel Caillaud 1s6/p2p1p2/5kb1/p6p/4s3/4b1r1/P2P1rP1/RSBQKBSR (11+12) SPG 19.5 R281 - Nicolas Dupont, Michel Caillaud rsbqkbsQ/2ppp1pp/4B3/6K1/P5R1/S1P2P1P/4PB1S/7R (13+12) SPG 20.0 R282 - Klaus Wenda 4S3/bs5s/4p3/p2P2qr/r7/3K4/1pp2p2/2Bk4 (4+12) -7 & #1, Proca retractor, Anticirce Cheylan Probleemblad 4-2005 (Jul-Aug) R283 - Eyjolfur Eyjolfsson rs1qkbR1/p1pppp2/1p6/7p/8/8/PPPPQP2/RSB1KBS1 (13+12) SPG 7.0 (2 solutions) R284 - Thierry le Gleuher 4bS2/p1p3p1/1s1p4/1p1s1r2/kr1Q1p2/q7/1PPP1PPP/RSB1K1SR (14+13) SPG 20.5 R285c - Reto Aschwanden rsb1kbsr/Rp1R1ppp/pQ6/7P/7K/1Pp1P1P1/P1B3P1/B5S1 (13+13) Exact proofgame in 22.0 R286 - Martin van Essen 6s1/1pp1Pp2/3pr2S/5P1p/1spK1kPp/2P2b2/1PP5/2b3rq (8+15) -1 black & h#1 Probleemblad 5-2005 (Sep-Oct) R287 - Eyjolfur Eyjolfsson 1sbqkbsr/3ppppp/8/8/8/8/2PPPPPP/RrBQKBSR (13+13) SPG 6.5 (2 solutions) R288 - Unto Heinonen 3s2S1/p4p1p/q2p1p1k/rpp1Bb2/1b1P2Qr/2s1P3/PPP2P2/RS2K1SR (14+15) SPG 22.5 R289 - Andrei Kornilov 2bb1SBq/ppPrrP2/2pppKpk/5p1p/8/P7/1P3PPP/8 (10+14) Release the position R290 - Dmitri Baibikov 7B/1G2P3/P3pkP1/5g1b/3PPRqQ/3pK1rB/1p1P2Rr/6bS (14+10) Add pieces for a legal position (b7, f5=Giraffe=(1,4)-jumper) R291 - Wolfgang Dittmann b1r4k/6pP/1K3PpP/8/Pp6/6P1/5P1b/6B1 (8+7) -9 & #1, Proca retractor, Anticirce Probleemblad 6-2005 (Nov-Dec) R292 - Eyjolfur Eyjolfsson 7R/ppp2ppp/4p3/6b1/qQBksrbB/2SP4/1PP2PPP/1SR1K3 (14+13) SPG 17.5 R293 - Kostas Prentos, Endrei Frolkin rsb2bsr/p2ppqpp/R1p2Q2/1p2SK2/8/P3P3/P1kPBP1P/RSB5 (14+15) SPG 17.5 R294 - Satoshi Hashimoto Ksbqkbsr/pp2pp1p/2pr4/QB2S1p1/2Pp2P1/P4P2/1P1PP2P/R1B3SR (16+16) SPG 24.0 R295 - Rustam Ubaidullaev rs1QKB1R/3p1pp1/1pp1p1s1/7p/pP2r2P/3PPPPB/P1P5/RSbqkbS1 (16+16) SPG 25.5 R296 - Nicolas Dupont 2b1q3/3ps1p1/s6b/6k1/3r4/brs1K1p1/1PPP2PP/RSBQ1BSR (13+13) SPG 27.5 R297 - Wolfgang Dittmann 8/b1P5/k7/p3S3/6p1/3b2pp/1P1p4/2s4K (4+9) -5 & #1, Proca retractor, Anticirce From retromode at web.de Wed Dec 3 07:43:13 2008 From: retromode at web.de (=?iso-8859-15?Q?Bernd_Gr=E4frath?=) Date: Wed, 03 Dec 2008 13:43:13 +0100 Subject: [Retros] Probleemblad 2005 Message-ID: <1354149339@web.de> Dear retro-friends, I was/am the judge for the retros of Probleemblad 2005. It may be of interest to you that I wrote and sent my report in May 2006 (sic!), and it still has not been published... I also was/am the judge for the retros of Probleemblad 2006, and I wrote and sent that report in the summer of 2007 (sic!). I wonder when these awards will ever be published. I am writing this note so that no-one thinks that I am responsible for this regrettable state of affairs. Best wishes, Bernd > -----Urspr?ngliche Nachricht----- > Von: "Joost de Heer" > Gesendet: 03.12.08 00:19:41 > An: The Retrograde Analysis Mailing List > Betreff: [Retros] Probleemblad 2005 > Probleemblad 2005 is still missing from the retro corner. Here are the > originals from those issues. Hope I didn't make too many typing errors.... > > Probleemblad 1-2005 (Jan-Feb) > > R268 - Unto Heinonen > rsbq1b2/ppppp3/5p1s/7p/P5rk/1P1P4/1P3PP1/SBQKBSRR (14+15) > SPG 18.5 > > R269 - Jorge Lois, Roberto Osorio > rsbq1b2/1p1pp1p1/1k3pr1/2p3ps/4BBQ1/1P1PPP2/1PP4P/RSR1S1K1 (15+15) > SPG 20.0 > > R270 - Martin van Essen > 8/8/5pP1/8/2S2k1p/5p1P/5SPK/6BR (8+4) > -1 & s#1 > > R271 - Roberto Osorio > 1rbqks1r/pppppppp/4S3/8/8/8/PPPPPPPP/SRBQKB1R (16+14) > -3 & #1, Proca retractor, Relay chess with retroanalysis > > R272 - Klaus Wenda > 2bB4/2P3S1/1P1k3b/8/8/6r1/8/4K3 (5+4) > -4 & #1, Proca retractor, Anticirce > > R273 - Wolfgang Dittmann > 8/8/2kr1P2/3b3B/3p3p/2P2PB1/P1K2R1p/1S6 (9+6) > -5 & #1, Proca retractor, Anticirce > > Probleemblad 2-2005 (Mar-Apr) > > R274 - Francois Labelle, Joost de Heer > rsbqkbsr/pp1p1ppp/8/8/8/8/PP1P1PPP/RSBQKBSR (14+14) > SPG 7.0 (2 solutions) > > R275 - Mario Parrinello > 2b3B1/1pspk2p/1p1p1r2/2pr4/5p1s/1P2P3/1PP1PP2/1SBQK1SR (13+13) > SPG 19.5 > > R276 - Jorge Lois, Roberto Osorio > rsbqkbsr/pppppppp/B1Q5/8/P3P3/2S5/3PKPPP/RSB4R (14+16) > Exact proofgame in 15.0, Andernach chess > > Probleemblad 3-2005 (May-Jun) > > R277 - Peter van den Heuvel > r1bqk3/ppppbpRp/8/8/8/8/P1P1PPPP/1r1QKBSR (12+12) > SPG 10.0 > > R278 - Unto Heinonen > In memoriam Jan Hannelius > 2b1k3/2p1s2P/s1rpp2Q/p1q1p3/1br1p3/7B/1PPP1P1P/1SB1K1SR (13+14) > SPG 17.0 > > R279 - Michel Caillaud > 3sb3/2qrspp1/3k4/2pp3r/8/6b1/1P2PPPp/RSBQKBSR (12+13) > SPG 19.5 > > R280 - Michel Caillaud > 1s6/p2p1p2/5kb1/p6p/4s3/4b1r1/P2P1rP1/RSBQKBSR (11+12) > SPG 19.5 > > R281 - Nicolas Dupont, Michel Caillaud > rsbqkbsQ/2ppp1pp/4B3/6K1/P5R1/S1P2P1P/4PB1S/7R (13+12) > SPG 20.0 > > R282 - Klaus Wenda > 4S3/bs5s/4p3/p2P2qr/r7/3K4/1pp2p2/2Bk4 (4+12) > -7 & #1, Proca retractor, Anticirce Cheylan > > Probleemblad 4-2005 (Jul-Aug) > > R283 - Eyjolfur Eyjolfsson > rs1qkbR1/p1pppp2/1p6/7p/8/8/PPPPQP2/RSB1KBS1 (13+12) > SPG 7.0 (2 solutions) > > R284 - Thierry le Gleuher > 4bS2/p1p3p1/1s1p4/1p1s1r2/kr1Q1p2/q7/1PPP1PPP/RSB1K1SR (14+13) > SPG 20.5 > > R285c - Reto Aschwanden > rsb1kbsr/Rp1R1ppp/pQ6/7P/7K/1Pp1P1P1/P1B3P1/B5S1 (13+13) > Exact proofgame in 22.0 > > R286 - Martin van Essen > 6s1/1pp1Pp2/3pr2S/5P1p/1spK1kPp/2P2b2/1PP5/2b3rq (8+15) > -1 black & h#1 > > Probleemblad 5-2005 (Sep-Oct) > > R287 - Eyjolfur Eyjolfsson > 1sbqkbsr/3ppppp/8/8/8/8/2PPPPPP/RrBQKBSR (13+13) > SPG 6.5 (2 solutions) > > R288 - Unto Heinonen > 3s2S1/p4p1p/q2p1p1k/rpp1Bb2/1b1P2Qr/2s1P3/PPP2P2/RS2K1SR (14+15) > SPG 22.5 > > R289 - Andrei Kornilov > 2bb1SBq/ppPrrP2/2pppKpk/5p1p/8/P7/1P3PPP/8 (10+14) > Release the position > > R290 - Dmitri Baibikov > 7B/1G2P3/P3pkP1/5g1b/3PPRqQ/3pK1rB/1p1P2Rr/6bS (14+10) > Add pieces for a legal position (b7, f5=Giraffe=(1,4)-jumper) > > R291 - Wolfgang Dittmann > b1r4k/6pP/1K3PpP/8/Pp6/6P1/5P1b/6B1 (8+7) > -9 & #1, Proca retractor, Anticirce > > Probleemblad 6-2005 (Nov-Dec) > > R292 - Eyjolfur Eyjolfsson > 7R/ppp2ppp/4p3/6b1/qQBksrbB/2SP4/1PP2PPP/1SR1K3 (14+13) > SPG 17.5 > > R293 - Kostas Prentos, Endrei Frolkin > rsb2bsr/p2ppqpp/R1p2Q2/1p2SK2/8/P3P3/P1kPBP1P/RSB5 (14+15) > SPG 17.5 > > R294 - Satoshi Hashimoto > Ksbqkbsr/pp2pp1p/2pr4/QB2S1p1/2Pp2P1/P4P2/1P1PP2P/R1B3SR (16+16) > SPG 24.0 > > R295 - Rustam Ubaidullaev > rs1QKB1R/3p1pp1/1pp1p1s1/7p/pP2r2P/3PPPPB/P1P5/RSbqkbS1 (16+16) > SPG 25.5 > > R296 - Nicolas Dupont > 2b1q3/3ps1p1/s6b/6k1/3r4/brs1K1p1/1PPP2PP/RSBQ1BSR (13+13) > SPG 27.5 > > R297 - Wolfgang Dittmann > 8/b1P5/k7/p3S3/6p1/3b2pp/1P1p4/2s4K (4+9) > -5 & #1, Proca retractor, Anticirce > _______________________________________________ > Retros mailing list > Retros at janko.at > http://www.pairlist.net/mailman/listinfo/retros > _______________________________________________________________________ Sensationsangebot verl?ngert: WEB.DE FreeDSL - Telefonanschluss + DSL f?r nur 16,37 Euro/mtl.!* http://dsl.web.de/?ac=OM.AD.AD008K13805B7069a From ralphmerridew at gmail.com Wed Dec 3 18:27:13 2008 From: ralphmerridew at gmail.com (Mark Tilford) Date: Wed, 3 Dec 2008 18:27:13 -0500 Subject: [Retros] Die Schwalbe Heft 234, Nov-Dec 2008 In-Reply-To: <49353369.3040703@sanguis.xs4all.nl> References: <49353369.3040703@sanguis.xs4all.nl> Message-ID: On Tue, Dec 2, 2008 at 8:08 AM, Joost de Heer wrote: > 13941 - Thierry le Gleuher > k4b1s/pppRpp1b/3p2p1/5pK1/5P1S/3P1P1B/PPP2PPB/4Sr2 (14+13) > +---+---+---+---+---+---+---+---+ > |*K | . | | . | |*B | |*S | > +---+---+---+---+---+---+---+---+ > |*P |*P |*P | R |*P |*P | . |*B | > +---+---+---+---+---+---+---+---+ > | | . | |*P | | . |*P | . | > +---+---+---+---+---+---+---+---+ > | . | | . | | . |*P | K | | > +---+---+---+---+---+---+---+---+ > | | . | | . | | P | | S | > +---+---+---+---+---+---+---+---+ > | . | | . | P | . | P | . | B | > +---+---+---+---+---+---+---+---+ > | P | P | P | . | | P | P | B | > +---+---+---+---+---+---+---+---+ > | . | | . | | S |*R | . | | > +---+---+---+---+---+---+---+---+ > #1 (Who?) Is it assumed that the 50 move rule is automatically used? Otherwise, it's possible to flip parity using the black rook at f1. From joost at sanguis.xs4all.nl Wed Dec 3 19:16:02 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Thu, 04 Dec 2008 01:16:02 +0100 Subject: [Retros] Die Schwalbe Heft 234, Nov-Dec 2008 In-Reply-To: <49353369.3040703@sanguis.xs4all.nl> References: <49353369.3040703@sanguis.xs4all.nl> Message-ID: <49372142.20101@sanguis.xs4all.nl> > 13940 - Arno T?ngler > A: ss1b4/p3P3/2PrRr2/ssrkBRP1/1Kb2q2/P2PrP2/1r6/1Bs3b1 (11+16) > B: ss6/4P3/2PrRr2/2rkBRP1/1Kb2q2/P2PrP2/1r6/1Bs3b1 (11+12) > +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ > |*S |*S | |*B | | . | | . | |*S |*S | | . | | . | | . | > +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ > |*P | | . | | P | | . | | | . | | . | | P | | . | | > +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ > | | . | P |*R | R |*R | | . | | | . | P |*R | R |*R | | . | > +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ > |*S |*S |*R |*K | B | R | P | | | . | |*R |*K | B | R | P | | > +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ > | | K |*B | . | |*Q | | . | | | K |*B | . | |*Q | | . | > +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ > | P | | . | P |*R | P | . | | | P | | . | P |*R | P | . | | > +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ > | |*R | | . | | . | | . | | |*R | | . | | . | | . | > +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ > | . | B |*S | | . | |*B | | | . | B |*S | | . | |*B | | > +---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+ > ser-A->B 320 The correct position of B is: ss6/4P3/2PrRr2/KBrk1RP1/P1bB1q2/3PrP2/1r6/2s3b1 (11+12) +---+---+---+---+---+---+---+---+ |*S |*S | | . | | . | | . | +---+---+---+---+---+---+---+---+ | . | | . | | P | | . | | +---+---+---+---+---+---+---+---+ | | . | P |*R | R |*R | | . | +---+---+---+---+---+---+---+---+ | K | B |*R |*K | . | R | P | | +---+---+---+---+---+---+---+---+ | P | . |*B | B | |*Q | | . | +---+---+---+---+---+---+---+---+ | . | | . | P |*R | P | . | | +---+---+---+---+---+---+---+---+ | |*R | | . | | . | | . | +---+---+---+---+---+---+---+---+ | . | |*S | | . | |*B | | +---+---+---+---+---+---+---+---+ >> 13941 - Thierry le Gleuher >> k4b1s/pppRpp1b/3p2p1/5pK1/5P1S/3P1P1B/PPP2PPB/4Sr2 (14+13) #1 >> (Who?) > Is it assumed that the 50 move rule is automatically used? Yes, if white can prove that, if black claims to have the move, at least 100 halfmoves without capture, pawn move or castling have occurred, the position is a draw, and black can't mate. The same for black if white claims to have the move. From joost at sanguis.xs4all.nl Thu Dec 4 06:29:39 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Thu, 04 Dec 2008 12:29:39 +0100 Subject: [Retros] Probleemblad 2006 Message-ID: <4937BF23.2070701@sanguis.xs4all.nl> And a few issues from 2006 are missing. Here they are. Probleemblad 1-2006 (Jan-Feb) R298 - Mario Parrinello rsbqkbsr/p1p1ppp1/1pp5/7p/2R2K1P/2P5/PP1SSPP1/R7 (11+16) SPG 12.0 R299 - G. Shinkarenko, V. Shevshenko Dedicated to L. Lyubashevski rsbqk1s1/r1pp2p1/pp6/3Sp2p/7P/PP6/R1PP1PP1/RS1K4 (12+14) SPG 15.0 R300 - Roberto Osorio, Jorge Lois 3Sk3/p2p3p/pQs5/6ps/P1pP2Rb/2P3P1/r1PP3p/1S2KB1R (13+12) SPG 23.5 R301 - Thierry le Gleuher 1q5B/1Pp2pp1/P1p1p3/5k2/2b1p3/2P1P3/1P2PP2/R3K1b1 (10+10) h#2 Duplex R302 - Joost de Heer 1rb1k1r1/p2psp1p/2s5/1qp1p3/8/8/1PPPPbPP/RSBQKBSR (10+10) SPG 10.0, Extinction chess Extinction chess: There are no royal pieces. The first player who doesn't have pieces of all types loses the game. Pawns may promote to any other type of piece, including kings. Probleemblad 2-2006 (Mar-Apr) R303 - Paul Raican r3s3/pp1pp2p/2pBp1p1/1k1s4/3P4/5S2/P1PPP1PP/RSrQKB1R (15+13) SPG 21.0 R304 - Andrei Kornilov, Andrei Frolkin 2BbSqRB/1ppr1r1k/3ppKRP/5ppp/5P2/8/PpPP1PP1/8 (13+13) Release the position R305 - 4QSBR/pp5p/kB6/8/KPPS2p1/1rb2P2/Pp1P1PR1/7b (14+9) -4 & #1, Proca retractor R306 - Klaus Wenda 7S/4sBb1/8/4P1P1/8/k7/1S6/1QB1K3 (8+3) -2 & s#1, Proca retractor, Anticirce Calvet Probleemblad 3-2006 (May-Jun) R307 - Andrei Frolkin, Kostas Prentos 8/p4kp1/pqsb1psB/6pP/4b3/3s1r2/PPPK1P1P/RS1B1QSR (14+13) SPG 22.5 R308 - Unto Heinonen 1rBQKBsR/p2p2S1/s3p3/1p3ppp/P7/S3PP2/1PP3PP/r1bqkbR1 (15+15) SPG 29.0 R309 - Guus Rol Dedicated to R.J. Aumann and T.C. Schelling r3ks1R/p2p1ppB/P1pP2pb/4p1Pr/2Q4p/1P5K/7P/8 (9+13) #7 R310 - Vlaicu Crisan, Klaus Wenda 7B/8/6k1/4B3/8/4Pp2/7b/4K2r (4+4) -16 & s#1, Proca retractor, Anticirce Cheylan R304c - Andrei Kornilov, Andrei Frolkin 2BbS2B/1pprrQRk/3ppKRP/5ppp/5P2/8/PpPP1PP1/8 (14+12) Release the position R311 - Unto Heinonen kr6/1pp2pp1/1p4p1/4p3/4sb2/2S5/1PP1PP2/R5K1 (7+11) SPG 16.5 R312 - Thierry le Gleuher 1q3br1/P2ppppP/s1p1bP1s/1pp2br1/1P6/8/2PP2P1/2KR3k (9+16) SPG 28.5 R313 - Andrei Kornilov 1 1 1 3 1 1 1 2 5 3 +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ 1| | | | | | | | | +---+---+---+---+---+---+---+---+ 2| | | | | | | | | +---+---+---+---+---+---+---+---+ 1| | | | | | | | | +---+---+---+---+---+---+---+---+ 2 3| | | | | | | | | +---+---+---+---+---+---+---+---+ 1 3| | | | | | | | | +---+---+---+---+---+---+---+---+ 1 2| | | | | | | | | +---+---+---+---+---+---+---+---+ 1 2| | | | | | | | | +---+---+---+---+---+---+---+---+ a) Determine the occupied squares (Using the Paint By Numbers method) b) Add on these squares 2 kings, 1 white bishop and 16 pawns (10+9). c) Orientate the board From joost at sanguis.xs4all.nl Thu Dec 4 15:30:45 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Thu, 04 Dec 2008 21:30:45 +0100 Subject: [Retros] The Problemist 2004 Message-ID: <49383DF5.5070209@sanguis.xs4all.nl> The Problemist seems to miss a lot of issues. Here are the missing issues from 2004: TP may 2004: R348 - Stefano Galletti 3P2p1/4P1p1/kPQ3p1/6p1/KPp3p1/5b2/1P4p1/RP6 (9+9) Rotate 90 degrees and #1. Which way? R349F - Dmitri Baibikov 8/1p2p2p/1P5P/1p4P1/BrPP4/1Qqp4/KSkrPP2/gRBbb2s (13+13) Release the position (grasshopper a1) b) nightrider a1 R350 - Unto Heinonen bqkbsrrs/2pp1p1p/6P1/8/1P2S2B/5B2/P1PPPP1P/RS1QK2R (16+12) SPG 17.0 R337v - ?rp?d Moln?r (TP july 2003) r3k2B/1s2pppP/4s2r/6P1/S7/1P5Q/pPP2P2/bb2K2R (11+11) s#2 (Maximum) b) bPe6 F2297 - Wolfgang Dittmann 2q5/r7/8/2S2r2/1p1p3b/2k2p1p/1p1sP3/R1B3K1 (5+11) -4 & #1, Proca retractor, Anticirce Cheylan TP July 2004: R351 - Michael Grushko Dedicated to John Rice 1skr1bsr/pb2pppp/2p5/2p5/8/8/1PPPPPP1/RSBQKBSR (14+14) SPG 8.0 R352 - Charles Frankiss rsb1kb1r/ppp1pp1B/7s/3p3s/5P1R/7S/PPPP3q/RSBQK2R (14+15) SPG 12.0 R345v - Cedric Lytton 1s2kbsr/1pp1pp1p/8/8/p6r/6Pb/1PP2PP1/SBQKBSRR (13+13) PS1353F - Marco Bonavoglia rsb1k2r/pppp1p1p/3b1pp1/7s/8/5B2/PPPPSPPq/RSBQ1RK1 (14+16) SPG 13.0 PS1354F - Marco Bonavoglia rsbqkbsr/ppp1pppp/8/8/3p4/3P4/PPPSPPPP/2BQKBSR (15+16) PG 5.0 (Einstein) RP Sep. 2004 R353 - Eyjolfur Eyjolfsson rsbSkbsr/p2ppppp/8/8/8/8/PPP2PPP/RSBQKBSR (15+13) SPG 6.5 (2 solutions) R354 - Mario Parrinello b5s1/p1pq2p1/rs6/1p6/k2r4/7p/PPP1P2P/RSBQKBSR (13+12) SPG 18.0 R342v - Paul Raican rsbqk1s1/pppSpp1P/1B1R1pp1/Q7/2B1S3/1PP1P3/1PP1KP2/2b5 (14+14) SPG 25.0 TP November 2004: R355 - Nicolas Dupont s1qb2r1/2s1pp2/3pp2p/3rpb2/p3k3/8/3PPP1P/RSBQKBSR (12+15) SPG 28.0 R356 - Alexander Yarosh kBbKQs2/b1p1pp2/pprpr3/3q4/8/8/2PPPPP1/8 (8+13) Add 6 units and #1 (try) From Pastmaker at aol.com Fri Dec 5 23:30:43 2008 From: Pastmaker at aol.com (Pastmaker at aol.com) Date: Fri, 5 Dec 2008 23:30:43 EST Subject: [Retros] Die Schwalbe Heft 234, Nov-Dec 2008 Message-ID: as we found out a while ago, in the rules of chess castling is not relevant. ************** Stay in touch with ALL of your friends: update your AIM, Bebo, Facebook, and MySpace pages with just one click. The NEW AOL.com. (http://www.aol.com/?optin=new-dp&icid=aolcom40vanity&ncid=emlcntaolcom00000012) -------------- next part -------------- An HTML attachment was scrubbed... URL: From abrobecker at yahoo.com Mon Dec 8 05:37:47 2008 From: abrobecker at yahoo.com (Alain BROBECKER) Date: Mon, 8 Dec 2008 02:37:47 -0800 (PST) Subject: [Retros] Die Schwalbe Heft 234, Nov-Dec 2008 In-Reply-To: Message-ID: <438471.74729.qm@web56201.mail.re3.yahoo.com> >> 13947 - Alain Brobecker >> Find the unique game in monochromatic chess that ends with 5.Qc6-e8# >> >> 13948 - Alain Brobecker >> Find the unique game in monochromatic chess that ends with 5... Be7xPd6# > > >Mistranslation > >13947 - Alain Brobecker >Which exact proofgame in monochromatic chess ends with 5. Qc6-e8#? > >13948 - Alain Brobecker >Which exact proofgame in monochromatic chess ends with 5. .. Be7xPd6#? When sending it to Thomas i wrote: Find the unique game in monochromatic chess terminating with 5.Qc6-e8# Find the unique game in monochromatic chess terminating with 5... Be7xPd6# What would be the difference between both? cu, Alain Alain Brobecker (abrobecker at yahoo.com) |_ _ _ |_ http://abrobecker.free.fr/ |_)(_|(_|| ) of Arm's Tech From joost at sanguis.xs4all.nl Mon Dec 8 06:04:19 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Mon, 08 Dec 2008 12:04:19 +0100 Subject: [Retros] Die Schwalbe Heft 234, Nov-Dec 2008 In-Reply-To: <438471.74729.qm@web56201.mail.re3.yahoo.com> References: <438471.74729.qm@web56201.mail.re3.yahoo.com> Message-ID: <493CFF33.7030103@sanguis.xs4all.nl> Alain BROBECKER wrote: >>> 13947 - Alain Brobecker >>> Find the unique game in monochromatic chess that ends with 5.Qc6-e8# >>> >>> 13948 - Alain Brobecker >>> Find the unique game in monochromatic chess that ends with 5... Be7xPd6# >> >> Mistranslation >> >> 13947 - Alain Brobecker >> Which exact proofgame in monochromatic chess ends with 5. Qc6-e8#? >> >> 13948 - Alain Brobecker >> Which exact proofgame in monochromatic chess ends with 5. .. Be7xPd6#? > > When sending it to Thomas i wrote: > Find the unique game in monochromatic chess terminating with 5.Qc6-e8# > Find the unique game in monochromatic chess terminating with 5... Be7xPd6# > > What would be the difference between both? In the wording of Die Schwalbe, IMO, you can have more final positions with last move Qc6-e8#, but only one of them has a unique proofgame. Welche eindeutige Beweistpartie im monochromen Schach ended mit 5. Dc6-e8#/5...Le7:Bd6#? Joost From liskov at im.bas-net.by Mon Dec 15 10:33:48 2008 From: liskov at im.bas-net.by (Valery Liskovets) Date: Mon, 15 Dec 2008 17:33:48 +0200 Subject: [Retros] Obsolete text of the acting FIDE Laws of Chess References: <438471.74729.qm@web56201.mail.re3.yahoo.com> <493CFF33.7030103@sanguis.xs4all.nl> Message-ID: <494678DC.96D81839@im.bas-net.by> Dear retro-friends, Let me pay your attention to the discrepancy between the wording of the (2005) FIDE Laws of Chess as they are CURRENTLY represented (since July (?) 2007) at the FIDE website http://www.fide.com/component/handbook/?id=124&view=article and at http://www.janko.at/Retros/Glossary/FideLaws2004.htm (or http://www.janko.at/Retros/Glossary/FideLaws2004C ). This is _not_ a new edition: merely, AFAIK, the former text at the official FIDE site (slightly) differed from the adopted one... In particular the discrepancies are concerned with Art. 3.7.d (on e.p.), 3.8.ii(2) (on castling) and 4.3 (on touching pieces). The distinctions have been scrutinized at the Chess Chat Forum http://www.chesschat.org/showthread.php?t=6605 . Experts claim there that the current text is authentic. "Doveryay no proveryay" [Trust but check], as President Ronald Reagan used to say in Russian. Valery Liskovets From otto at janko.at Mon Dec 15 11:56:42 2008 From: otto at janko.at (Otto Janko) Date: Mon, 15 Dec 2008 17:56:42 +0100 Subject: [Retros] Obsolete text of the acting FIDE Laws of Chess In-Reply-To: <494678DC.96D81839@im.bas-net.by> References: <438471.74729.qm@web56201.mail.re3.yahoo.com><493CFF33.7030103@sanguis.xs4all.nl> <494678DC.96D81839@im.bas-net.by> Message-ID: <259AC4638398478E9DA7C8F8DE5DC633@ww300.siemens.net> Hi ALL, The question is: Which rules apply for the time from 2004 until now? IMHO the *published* rules are valid, no matter whether they are wrong or not. At least this is the case for 'normal' laws, because the public can follow only published rules. FIDE has a post on their webiste announcing the corrected version. http://www.fide.com/news.asp?id=1399 ... this link does not work! (not found) ~?tt?~ > -----Original Message----- > From: retros-bounces at janko.at > [mailto:retros-bounces at janko.at] On Behalf Of Valery Liskovets > Sent: Monday, December 15, 2008 4:34 PM > To: The Retrograde Analysis Mailing List > Subject: [Retros] Obsolete text of the acting FIDE Laws of Chess > > Dear retro-friends, > > Let me pay your attention to the discrepancy between the wording > of the (2005) FIDE Laws of Chess as they are CURRENTLY represented > (since July (?) 2007) at the FIDE website > http://www.fide.com/component/handbook/?id=124&view=article > and at > http://www.janko.at/Retros/Glossary/FideLaws2004.htm > (or http://www.janko.at/Retros/Glossary/FideLaws2004C ). > This is _not_ a new edition: merely, AFAIK, the former text at > the official FIDE site (slightly) differed from the adopted one... > > In particular the discrepancies are concerned with Art. 3.7.d > (on e.p.), 3.8.ii(2) (on castling) and 4.3 (on touching pieces). > The distinctions have been scrutinized at the Chess Chat Forum > http://www.chesschat.org/showthread.php?t=6605 . > Experts claim there that the current text is authentic. > > "Doveryay no proveryay" [Trust but check], as President Ronald Reagan > used to say in Russian. > > Valery Liskovets > > _______________________________________________ > Retros mailing list > Retros at janko.at > http://www.pairlist.net/mailman/listinfo/retros > From mri_two at t-online.de Wed Dec 17 00:43:53 2008 From: mri_two at t-online.de (Mario Richter) Date: Wed, 17 Dec 2008 06:43:53 +0100 Subject: [Retros] Retro_snippets_001 - Schnoebelen Promotion Message-ID: <001301c9600a$723bc930$0100a8c0@he2p306> Dear Retrofans, more and more chess problem sources have been digitized and are now available to a broader public. Sometimes one can fill gaps in the knowledge about certain chess problem aspects (Valery Liskovets' article about forced e.p. in 'Die Schwalbe', October 2008 is a good example), sometimes even some surprising new facts can be discovered. So here is one, which is about 'Schnoebelen promotions'. Our Retro Wiki (http://retrowiki.janko.at/index.php/Schnoebelen ) gives the following definition: "A promotee is captured on its promotion square without having moved after the promotion." The Wiki doesn't explain, why it is named 'Schnoebelen'. The answer is simple: It is named after Philippe Schnoebelen, who has introduced this idea in the area of Proof Games. In his own words: (s. http://www.lsv.ens-cachan.fr/~phs/perso.php ) "I invented what is now called 'The Schnoebelen Promotion Theme' in chess problems. Rather than describe the theme and spoil all the fun, I'd rather let you solve the following puzzle: Ph. Schnoebelen Probleemblad 09/1996 a b c d e f g h +---+---+---+---+---+---+---+---+ | |*n |*n | B | |*r | | . | 8 +---+---+---+---+---+---+---+---+ | . | |*p |*p | . |*p | . | | 7 +---+---+---+---+---+---+---+---+ | | . | |*k | | . | | . | 6 +---+---+---+---+---+---+---+---+ |*p | | . | | . | | . |*p | 5 +---+---+---+---+---+---+---+---+ | | . |*q | . | | . | | Q | 4 +---+---+---+---+---+---+---+---+ | . | | . | | P | |*p |*r | 3 +---+---+---+---+---+---+---+---+ | | P | P | . | | P | P | P | 2 +---+---+---+---+---+---+---+---+ | R | N | . | | K | B | N | R | 1 (14+12) +---+---+---+---+---+---+---+---+ a b c d e f g h 1nnB1r2/2pp1p2/3k4/p6p/2q4Q/4P1pr/1PP2PPP/RN2KBNR Invent a legal chess game that reaches the above position just after Black's 15th move. " So far Philippe about his idea. [Interestingly, in a comment to the solution (presented at problem 3075 at http://www.janko.at/Retros/Probleemblad/Solutions.htm) the theme is explained as "Hyper-Frolkin theme where Frolkin promotees do not move at all between promotion and capture."] But as already Johann Wolfgang von Goethe knew: (Faust. Part II) MEPHISTOPHELES. Original, fahr hin in deiner Pracht! - Wie w?rde dich die Einsicht kr?nken: Wer kann was Dummes, wer was Kluges denken, Das nicht die Vorwelt schon gedacht! - Go forth in splendour, you primal man! - How could insight harm you, ever: Who can think of stupid things or clever, That past ages didn't, long ago, understand. (and of course Goethe too was anticipated, e.g. by Publius Terentius Afer, ~185-159 B.C.: "Nullumst iam dictum quod non sit dictum prius." [Nothing is ever said that has not been said before.]). When studying the August 1948 issue of the 'Fairy Chess Review' (Vol.7 No.1, available at http://problem64.beda.cz/silo/fcr_1_1948.pdf), I came across the following short article in the section "5-Minute Papers" (page 94): ## Start of quotation ####################################### No.117 The captured promoted piece never moved By Dr. Ing. L.Ceriani, Milan Here is a quite new, and I believe very difficult idea in retrograde analysis. It is required to show in the retro developement of a position that a Pawn has promoted to a definite piece, has stood unmoved as the piece for at least one turn, and has dis- appeared captured on the promotion square. The difficulty lies in the second condition mainly, for if the capture were immediate nothing could deter- mine the nature of the piece. After prolonged research, I obtained Nos. 7743-4. No. 7743 +---+---+---+---+---+---+---+---+ | | . |*n | R | R | N | |*n | 8 +---+---+---+---+---+---+---+---+ | . |*k | N |*p | K | P | P | P | 7 +---+---+---+---+---+---+---+---+ |*r | P |*b | P |*p |*p |*p |*p | 6 +---+---+---+---+---+---+---+---+ |*p |*p | . |*p | . | | . | P | 5 +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | 4 +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | | 3 +---+---+---+---+---+---+---+---+ | P | . | | . | | . | | . | 2 +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | | 1 (12+13) +---+---+---+---+---+---+---+---+ a b c d e f g h 2nRRN1n/1kNpKPPP/rPbPpppp/pp1p3P/8/8/P7/8 No. 7744 +---+---+---+---+---+---+---+---+ | | K | |*q | |*b | | . | 8 +---+---+---+---+---+---+---+---+ |*n |*p | Q |*p |*k | P | P | | 7 +---+---+---+---+---+---+---+---+ |*r | P | B | R |*p |*r |*p | . | 6 +---+---+---+---+---+---+---+---+ |*p |*p | . |*p | . |*p | . | | 5 +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | 4 +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | | 3 +---+---+---+---+---+---+---+---+ | P | . | | P | | P | | . | 2 +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | | 1 (10+14) +---+---+---+---+---+---+---+---+ a b c d e f g h 1K1q1b2/npQpkPP1/rPBRprp1/pp1p1p2/8/8/P2P1P2/8 What were the last moves in each of these? [... solution omitted in case you want do it for yourself. If you have difficulties in finding the solutions, see Henrik Juel's analysis in the PDB: www.softdecc.de/pdb/search.pdb?expression=PROBID='P0005073', www.softdecc.de/pdb/search.pdb?expression=PROBID='P0005071', ] The theme is not very fruitful: I think it is impossible to use a Q as theme piece, but I hope the R may be used. Another possibility is later defer- ment of the capture. ## End of quotation ####################################### As the developement shows, Ceriani was at least partially wrong with his assumptions. The theme is very fruitful, Rooks can be the thematical piece too (e.g. www.softdecc.de/pdb/search.pdb?expression=PROBID='P1067871'), and using fairy conditions, both unique immediate captures and even Schnoebelen Queens have been presented, for the latter s. e.g. Kostas Prentos & Andrey Frolkin Eteroscacco 1/2007 1. Honourable Mention SPG 16.5, Multicapture Chess +---+---+---+---+---+---+---+---+ |*r |*n |*b |*q |*k |*b |*n |*r | 8 +---+---+---+---+---+---+---+---+ |*p |*p |*p |*p |*p | | . | | 7 +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | 6 +---+---+---+---+---+---+---+---+ | P | | . | | . | | . | P | 5 +---+---+---+---+---+---+---+---+ | | . | | P | | R | | R | 4 +---+---+---+---+---+---+---+---+ | . | | . | | N | | . | N | 3 +---+---+---+---+---+---+---+---+ | | P | | . | | K | | . | 2 +---+---+---+---+---+---+---+---+ | . | | . | | . | | B | B | 1 (11+13) +---+---+---+---+---+---+---+---+ a b c d e f g h rnbqkbnr/ppppp3/8/P6P/3P1R1R/4N2N/1P3K2/6BB (s. http://www.eteroscacco.it/esp/verdetti_0607.html#vret ) Some open questions: - Which was the very first PG showing a Schnoebelen promotion? - And which was the very first PG showing a Schnoebelen Queen? - Using fairy conditions, has a Schnoebelen-AUW already been realized? - Longest move difference between promotion and capture? - What was the outcome of the Thematical Tourney, announced by L.Ceriani in the above quoted FCR article? (F.C.R. 13th TOURNEY, closing date: 31. December 1948) - should the Theme more correctly be called "Ceriani-Hyper-Frolkin-Schnoebelen-Promotion"? :-) Best regards, mario From retromode at web.de Wed Dec 17 07:37:47 2008 From: retromode at web.de (=?iso-8859-15?Q?Bernd_Gr=E4frath?=) Date: Wed, 17 Dec 2008 13:37:47 +0100 Subject: [Retros] Retro_snippets_001 - Schnoebelen Promotion Message-ID: <1379491406@web.de> Dear retro-friends, Mario asks: - And which was the very first PG showing a Schnoebelen Queen? Well, this can, of course, not be shown in an orthodox proof game. And I only know of one example in a fairy proof game, and that is my problem no. 1107 in Mat Plus No. 31 (Autumn 2008), using Circe. Best wishes, Bernd > -----Urspr?ngliche Nachricht----- > Von: "Mario Richter" > Gesendet: 17.12.08 06:44:10 > An: "Retros Mailing List" > Betreff: [Retros] Retro_snippets_001 - Schnoebelen Promotion > Dear Retrofans, > > more and more chess problem sources have been digitized > and are now available to a broader public. > > Sometimes one can fill gaps in the knowledge about certain > chess problem aspects (Valery Liskovets' article about > forced e.p. in 'Die Schwalbe', October 2008 is a good example), > sometimes even some surprising new facts can be discovered. > > > So here is one, which is about 'Schnoebelen promotions'. > > > Our Retro Wiki (http://retrowiki.janko.at/index.php/Schnoebelen ) > gives the following definition: > > "A promotee is captured on its promotion square > without having moved after the promotion." > > The Wiki doesn't explain, why it is named 'Schnoebelen'. > > The answer is simple: > It is named after Philippe Schnoebelen, who has introduced this > idea in the area of Proof Games. > > In his own words: > (s. http://www.lsv.ens-cachan.fr/~phs/perso.php ) > > "I invented what is now called 'The Schnoebelen Promotion Theme' > in chess problems. > Rather than describe the theme and spoil all the fun, I'd rather > let you solve the following puzzle: > > Ph. Schnoebelen > Probleemblad 09/1996 > > a b c d e f g h > +---+---+---+---+---+---+---+---+ > | |*n |*n | B | |*r | | . | 8 > +---+---+---+---+---+---+---+---+ > | . | |*p |*p | . |*p | . | | 7 > +---+---+---+---+---+---+---+---+ > | | . | |*k | | . | | . | 6 > +---+---+---+---+---+---+---+---+ > |*p | | . | | . | | . |*p | 5 > +---+---+---+---+---+---+---+---+ > | | . |*q | . | | . | | Q | 4 > +---+---+---+---+---+---+---+---+ > | . | | . | | P | |*p |*r | 3 > +---+---+---+---+---+---+---+---+ > | | P | P | . | | P | P | P | 2 > +---+---+---+---+---+---+---+---+ > | R | N | . | | K | B | N | R | 1 (14+12) > +---+---+---+---+---+---+---+---+ > a b c d e f g h > > 1nnB1r2/2pp1p2/3k4/p6p/2q4Q/4P1pr/1PP2PPP/RN2KBNR > > Invent a legal chess game that reaches the above position > just after Black's 15th move. " > > So far Philippe about his idea. > > > [Interestingly, in a comment to the solution > (presented at problem 3075 at > http://www.janko.at/Retros/Probleemblad/Solutions.htm) > the theme is explained as "Hyper-Frolkin theme where Frolkin > promotees do not move at all between promotion and capture."] > > > But as already Johann Wolfgang von Goethe knew: > (Faust. Part II) > MEPHISTOPHELES. > Original, fahr hin in deiner Pracht! - > Wie w?rde dich die Einsicht kr?nken: > Wer kann was Dummes, wer was Kluges denken, > Das nicht die Vorwelt schon gedacht! - > > Go forth in splendour, you primal man! - > How could insight harm you, ever: > Who can think of stupid things or clever, > That past ages didn't, long ago, understand. > > (and of course Goethe too was anticipated, e.g. by > Publius Terentius Afer, ~185-159 B.C.: "Nullumst iam > dictum quod non sit dictum prius." [Nothing is ever > said that has not been said before.]). > > > > > When studying the August 1948 issue of the > 'Fairy Chess Review' (Vol.7 No.1, available at > http://problem64.beda.cz/silo/fcr_1_1948.pdf), > I came across the following short article in the section > "5-Minute Papers" (page 94): > > ## Start of quotation ####################################### > > No.117 > The captured promoted piece never moved > By Dr. Ing. L.Ceriani, Milan > > Here is a quite new, and I believe very difficult > idea in retrograde analysis. It is required to show > in the retro developement of a position that a Pawn > has promoted to a definite piece, has stood unmoved > as the piece for at least one turn, and has dis- > appeared captured on the promotion square. The > difficulty lies in the second condition mainly, for > if the capture were immediate nothing could deter- > mine the nature of the piece. After prolonged > research, I obtained Nos. 7743-4. > > No. 7743 > > +---+---+---+---+---+---+---+---+ > | | . |*n | R | R | N | |*n | 8 > +---+---+---+---+---+---+---+---+ > | . |*k | N |*p | K | P | P | P | 7 > +---+---+---+---+---+---+---+---+ > |*r | P |*b | P |*p |*p |*p |*p | 6 > +---+---+---+---+---+---+---+---+ > |*p |*p | . |*p | . | | . | P | 5 > +---+---+---+---+---+---+---+---+ > | | . | | . | | . | | . | 4 > +---+---+---+---+---+---+---+---+ > | . | | . | | . | | . | | 3 > +---+---+---+---+---+---+---+---+ > | P | . | | . | | . | | . | 2 > +---+---+---+---+---+---+---+---+ > | . | | . | | . | | . | | 1 (12+13) > +---+---+---+---+---+---+---+---+ > a b c d e f g h > > 2nRRN1n/1kNpKPPP/rPbPpppp/pp1p3P/8/8/P7/8 > > > > No. 7744 > > +---+---+---+---+---+---+---+---+ > | | K | |*q | |*b | | . | 8 > +---+---+---+---+---+---+---+---+ > |*n |*p | Q |*p |*k | P | P | | 7 > +---+---+---+---+---+---+---+---+ > |*r | P | B | R |*p |*r |*p | . | 6 > +---+---+---+---+---+---+---+---+ > |*p |*p | . |*p | . |*p | . | | 5 > +---+---+---+---+---+---+---+---+ > | | . | | . | | . | | . | 4 > +---+---+---+---+---+---+---+---+ > | . | | . | | . | | . | | 3 > +---+---+---+---+---+---+---+---+ > | P | . | | P | | P | | . | 2 > +---+---+---+---+---+---+---+---+ > | . | | . | | . | | . | | 1 (10+14) > +---+---+---+---+---+---+---+---+ > a b c d e f g h > > 1K1q1b2/npQpkPP1/rPBRprp1/pp1p1p2/8/8/P2P1P2/8 > > What were the last moves in each of these? > > [... solution omitted in case you want do it for > yourself. If you have difficulties in finding the > solutions, see Henrik Juel's analysis in the PDB: > www.softdecc.de/pdb/search.pdb?expression=PROBID='P0005073', > www.softdecc.de/pdb/search.pdb?expression=PROBID='P0005071', > ] > > The theme is not very fruitful: I think it is > impossible to use a Q as theme piece, but I hope the > R may be used. Another possibility is later defer- > ment of the capture. > > > ## End of quotation ####################################### > > > As the developement shows, Ceriani was at least partially > wrong with his assumptions. > > The theme is very fruitful, Rooks can be the thematical piece too > (e.g. www.softdecc.de/pdb/search.pdb?expression=PROBID='P1067871'), > and using fairy conditions, both unique immediate captures and > even Schnoebelen Queens have been presented, for the latter s. e.g. > > Kostas Prentos & Andrey Frolkin > Eteroscacco 1/2007 > 1. Honourable Mention > SPG 16.5, Multicapture Chess > +---+---+---+---+---+---+---+---+ > |*r |*n |*b |*q |*k |*b |*n |*r | 8 > +---+---+---+---+---+---+---+---+ > |*p |*p |*p |*p |*p | | . | | 7 > +---+---+---+---+---+---+---+---+ > | | . | | . | | . | | . | 6 > +---+---+---+---+---+---+---+---+ > | P | | . | | . | | . | P | 5 > +---+---+---+---+---+---+---+---+ > | | . | | P | | R | | R | 4 > +---+---+---+---+---+---+---+---+ > | . | | . | | N | | . | N | 3 > +---+---+---+---+---+---+---+---+ > | | P | | . | | K | | . | 2 > +---+---+---+---+---+---+---+---+ > | . | | . | | . | | B | B | 1 (11+13) > +---+---+---+---+---+---+---+---+ > a b c d e f g h > > rnbqkbnr/ppppp3/8/P6P/3P1R1R/4N2N/1P3K2/6BB > > (s. http://www.eteroscacco.it/esp/verdetti_0607.html#vret ) > > > > Some open questions: > > - Which was the very first PG showing a Schnoebelen promotion? > > - And which was the very first PG showing a Schnoebelen Queen? > > - Using fairy conditions, has a Schnoebelen-AUW already been > realized? > > - Longest move difference between promotion and capture? > > - What was the outcome of the Thematical Tourney, announced by > L.Ceriani in the above quoted FCR article? > (F.C.R. 13th TOURNEY, closing date: 31. December 1948) > > - should the Theme more correctly be called > "Ceriani-Hyper-Frolkin-Schnoebelen-Promotion"? :-) > > > > Best regards, > > mario > > _______________________________________________ > Retros mailing list > Retros at janko.at > http://www.pairlist.net/mailman/listinfo/retros > ____________________________________________________________________ Psssst! Schon vom neuen WEB.DE MultiMessenger geh?rt? Der kann`s mit allen: http://www.produkte.web.de/messenger/?did=3123 From andrew at anselan.com Wed Dec 17 07:44:30 2008 From: andrew at anselan.com (andrew buchanan) Date: Wed, 17 Dec 2008 04:44:30 -0800 (PST) Subject: [Retros] Retro_snippets_001 - Schnoebelen Promotion In-Reply-To: <001301c9600a$723bc930$0100a8c0@he2p306> Message-ID: <672878.55510.qm@web303.biz.mail.mud.yahoo.com> Afer after Qohelet :-) "What has been will be again, what has been done will be done again; there is nothing new under the sun." (Ecclesiastes 1:9-14 NIV) "Most critical scholars suggest that Ecclesiastes was written around 250 BCE by a non-Hellenized intellectual in the milieu of the Temple in Jerusalem, though Seow of the Anchor Bible commentary argues that it dates to the Persian period. The latest possible date for it is set by the fact that Ben Sirach (written ca. 180 BCE) repeatedly quotes or paraphrases it, as from a canonic rather than a contemporary writing." (http://en.wikipedia.org/wiki/Ecclesiastes) ---------------------------------------------- But as already Johann Wolfgang von Goethe knew: (Faust. Part II) MEPHISTOPHELES. Original, fahr hin in deiner Pracht! - Wie w?rde dich die Einsicht kr?nken: Wer kann was Dummes, wer was Kluges denken, Das nicht die Vorwelt schon gedacht! - Go forth in splendour, you primal man! - How could insight harm you, ever: Who can think of stupid things or clever, That past ages didn't, long ago, understand. (and of course Goethe too was anticipated, e.g. by Publius Terentius Afer, ~185-159 B.C.: "Nullumst iam dictum quod non sit dictum prius." [Nothing is ever said that has not been said before.]). From joost at sanguis.xs4all.nl Wed Dec 17 08:20:13 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Wed, 17 Dec 2008 14:20:13 +0100 (CET) Subject: [Retros] Retro_snippets_001 - Schnoebelen Promotion In-Reply-To: <1379491406@web.de> References: <1379491406@web.de> Message-ID: > > Mario asks: - And which was the very first PG showing a Schnoebelen Queen? > > Well, this can, of course, not be shown in an orthodox proof game. And I only know of one example in a fairy proof game, and that is > my problem no. 1107 in Mat Plus No. 31 (Autumn 2008), using Circe. Dirk Borst made a Queen Schnoebelen with transmuting kings in Nunspeet a few years ago. It looked something like this: rs3qsr/ppp3pp/3p1p2/8/k7/Pb6/1PPPP1PP/RSBQKBSR SPG 6.0 Transmuting kings And the first King Schnoebelen is, as far as I know one I made in Nunspeet, in, I think, 2002. rnb4q/1p1pp2p/p1p2k2/3B1p2/2PPn3/4P3/PP4PP/RNbQK1NR SPG 10.0, Extinction chess Joost From Nicolas.Dupont at math.univ-lille1.fr Wed Dec 17 08:33:42 2008 From: Nicolas.Dupont at math.univ-lille1.fr (Nicolas.Dupont at math.univ-lille1.fr) Date: Wed, 17 Dec 2008 14:33:42 +0100 (CET) Subject: [Retros] Retro_snippets_001 - Schnoebelen Promotion In-Reply-To: References: <1379491406@web.de> Message-ID: <1653.81.20.209.175.1229520822.squirrel@mathwebmail.univ-lille1.fr> >> Mario asks: - And which was the very first PG showing a Schnoebelen Queen? >> Well, this can, of course, not be shown in an orthodox proof game. And I >> only know of one example in a fairy proof game, and that is >> my problem no. 1107 in Mat Plus No. 31 (Autumn 2008), using Circe. > > Dirk Borst made a Queen Schnoebelen with transmuting kings in Nunspeet a few years ago. It looked something like this: > > rs3qsr/ppp3pp/3p1p2/8/k7/Pb6/1PPPP1PP/RSBQKBSR > SPG 6.0 Transmuting kings > > And the first King Schnoebelen is, as far as I know one I made in Nunspeet, in, I think, 2002. > > rnb4q/1p1pp2p/p1p2k2/3B1p2/2PPn3/4P3/PP4PP/RNbQK1NR > SPG 10.0, Extinction chess > > Joost A "Schnoebelen AUW" is presented in Masand (R 203 Problemesis) If you want to collect every fairy pg with a Q-Schnoebelen, I constructed one last year in the Lortap Chrismas Tourney. rnb1r3/ppp2Q1p/3p1ppn/P4k2/3RP3/2q1b3/1PPP2PP/1NB1KBNR PG 12.0 Lortap (C+) Second Prize Nicolas. From joost at sanguis.xs4all.nl Wed Dec 17 08:43:11 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Wed, 17 Dec 2008 14:43:11 +0100 (CET) Subject: [Retros] Retro_snippets_001 - Schnoebelen Promotion In-Reply-To: References: <1379491406@web.de> Message-ID: http://www.france-echecs.com/index.php?mode=showComment&art=20050312223050791 This has Dirk's Queen Schnoebelen (Nunspeet 2002) and my King Schnoebelen (Nunspeet 2005, not 2002). Joost From joost at sanguis.xs4all.nl Wed Dec 17 14:05:10 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Wed, 17 Dec 2008 20:05:10 +0100 Subject: [Retros] Retro_snippets_001 - Schnoebelen Promotion In-Reply-To: References: <1379491406@web.de> Message-ID: <49494D66.5070508@sanguis.xs4all.nl> Joost de Heer schreef: > http://www.france-echecs.com/index.php?mode=showComment&art=20050312223050791 > > > This has Dirk's Queen Schnoebelen (Nunspeet 2002) and my King > Schnoebelen (Nunspeet 2005, not 2002). ...and mentions my King Schnoebelen... Joost From raosorio at fibertel.com.ar Wed Dec 17 18:32:42 2008 From: raosorio at fibertel.com.ar (raosorio at fibertel.com.ar) Date: Wed, 17 Dec 2008 20:32:42 -0300 Subject: [Retros] =?iso-8859-7?q?ROBERTO_OSORIO=A2s_55th_JUBILEE_TOURNEY_?= =?iso-8859-7?q?=28RO55JT=29?= Message-ID: <29abd4018024.494961ea@fibertel.com.ar> ROBERTO OSORIO?s 55th JUBILEE TOURNEY (RO55JT) Die Schwalbe and Orbit announce the Roberto Osorio?s 55th Jubilee Tourney for orthodox proofgames, Theme: Embracing non-contemporary twin pieces (see article at http://sanguis.xs4all.nl/chess/RO55JT.pdf ). Thanks Joost. The theme can be shown anywhere on the board and the diagram can show non standard material. Multiple phases allowed and very welcome. Evaluation: the problems will be evaluated as a balance of their thematic contents, originality and general quality. Please indicate the thematic moves in the solution. Closing date: june 30th 2009 Director: Jorge Lois Judge: Roberto Osorio Entries: to be sent to Jorge Lois indicating subject RO55JT. Award: the Award will be published simultaneously in Die Schwalbe and Orbit. The participants will receive a corresponding copy. From raosorio at fibertel.com.ar Wed Dec 17 19:05:33 2008 From: raosorio at fibertel.com.ar (raosorio at fibertel.com.ar) Date: Wed, 17 Dec 2008 21:05:33 -0300 Subject: [Retros] Retro_snippets_001 - Schnoebelen Promotion / the Pawn case Message-ID: <4b0908cc1ccee.4949699d@fibertel.com.ar> Dear friends, Here follows an antecedent of Pawn Schnoebelen, Roberto Osorio - RML february 16th 2006 rnb2bnk/pppp1p2/1q1p4/8/7p/2N5/PQP1P1PP/R1B1KBNR PG in 22 single moves Singular on GOS>> ---------------------------------------------------------------------------------- Solution, a) Stipulation: single box type II b)sequence: 1.- d4,h5 2.- d5,h4 3.- d6,exd6 4.- f4,Qf6 5.- f5,Qxb2 6.- f6,Qb6 7.- f6xg7,ke7 8.- g7xh8,Kf6(h8 can't be bishop or queen) 9.- Qd4+,Kg6(h8 can't be a knight) 10.- Qb2,Kh7(h8 can't be a rook) 11.- Nc8,Kxh8 (Schoenebelen pawn). Singular PG on GOS is not an stipulation but a master characteristic. Solution is unique not only in a given stipulation but in an extended space of many stipualtions. (the concept is explained in my february 2006 mails to the RML). the main idea is that the solver has to find not only the sequence but first of all the chess stipualtion (within a set of Geometrically Orthodox Stipulations, GOS). The above PG could be presented directly as "single box type II" and it would be correct, but this presentation is much weaker since the sequence is unique not only in the "single box type II" space but in an extended space of many stip?lations (which clear up the potential of "single box type II" to allow a Pawn Schnoebelen.) best, Roberto From joost at sanguis.xs4all.nl Wed Dec 17 18:31:19 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Thu, 18 Dec 2008 00:31:19 +0100 Subject: [Retros] Retro_snippets_001 - Schnoebelen Promotion / the Pawn case In-Reply-To: <4b0908cc1ccee.4949699d@fibertel.com.ar> References: <4b0908cc1ccee.4949699d@fibertel.com.ar> Message-ID: <49498BC7.3070105@sanguis.xs4all.nl> raosorio at fibertel.com.ar wrote: > Dear friends, > Here follows an antecedent of Pawn Schnoebelen, > > Roberto Osorio - RML february 16th 2006 > rnb2bnk/pppp1p2/1q1p4/8/7p/2N5/PQP1P1PP/R1B1KBNR > PG in 22 single moves Singular on GOS>> > ---------------------------------------------------------------------------------- > Solution, > a) Stipulation: single box type II > b)sequence: > 1.- d4,h5 2.- d5,h4 3.- d6,exd6 4.- f4,Qf6 5.- f5,Qxb2 6.- f6,Qb6 > 7.- f6xg7,ke7 8.- g7xh8,Kf6(h8 can't be bishop or queen) > 9.- Qd4+,Kg6(h8 can't be a knight) 10.- Qb2,Kh7(h8 can't be a rook) > 11.- Nc8,Kxh8 (Schoenebelen pawn). SB doesn't work that way. A pawn stays a pawn until a piece X is captured. Only then it's replaced by X. There's no 'looking back' to see if the black king would've been in a selfcheck were that pawn piece X. 1. f4 d5 2. f5 d4 3. f6 d3 4. fg7 dc2 5. gf8 Qd3 6. ed3 Kd7 7. Ke2 cd1=B[wQf8] is a perfectly legal sequence in SB II. After whites 5th move, ed1=B is an illegal move however (selfcheck). Joost From joost at sanguis.xs4all.nl Wed Dec 17 18:49:13 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Thu, 18 Dec 2008 00:49:13 +0100 Subject: [Retros] Retro_snippets_001 - Schnoebelen Promotion / the Pawn case In-Reply-To: <4b0908cc1ccee.4949699d@fibertel.com.ar> References: <4b0908cc1ccee.4949699d@fibertel.com.ar> Message-ID: <49498FF9.7060604@sanguis.xs4all.nl> By the way, with SingleBox, Schnoebelen promotions are trivial (and even simpler than that). Queen: rsq1kbsr/pp2pppp/3p4/8/8/8/P1PP1PPP/RSBbKBSR SPG 5.0 SingleBox Type1 All other Schnoebelen promotions in 5.0 are left as an exercise for the reader. Joost From Pastmaker at aol.com Wed Dec 17 22:37:27 2008 From: Pastmaker at aol.com (Pastmaker at aol.com) Date: Wed, 17 Dec 2008 22:37:27 EST Subject: [Retros] Retro_snippets_001 - Schnoebelen Promotion Message-ID: in assessing Ceriani's conclusion, was distinction made between things accomplished in a proof game context and things accomplished in an orthodox retro context? ************** A Good Credit Score is 700 or Above. See yours in just 2 easy steps! (http://pr.atwola.com/promoclk/100000075x1215047751x1200957972/aol?redir=http://www.freecreditreport.com/pm/default.aspx?sc=668072%26hmpgID=62%26 bcd=DecemailfooterNO62) -------------- next part -------------- An HTML attachment was scrubbed... URL: From joost at sanguis.xs4all.nl Thu Dec 18 01:05:11 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Thu, 18 Dec 2008 07:05:11 +0100 Subject: [Retros] Retro_snippets_001 - Schnoebelen Promotion In-Reply-To: References: Message-ID: <4949E817.1030104@sanguis.xs4all.nl> Pastmaker at aol.com wrote: > > in assessing Ceriani's conclusion, was distinction made between things > accomplished in a proof game context and things accomplished in an > orthodox retro context? In Ceriani's time, exact proofgames were virtually unknown, weren't they? Joost From raosorio at fibertel.com.ar Thu Dec 18 19:43:17 2008 From: raosorio at fibertel.com.ar (raosorio at fibertel.com.ar) Date: Thu, 18 Dec 2008 21:43:17 -0300 Subject: [Retros] Schnoebelen promotions / the Pawn case / Singular PGs Message-ID: <9351da0a1ba07.494ac3f5@fibertel.com.ar> Hi Joost, You wrote, 1) "By the way, with SingleBox, Schnoebelen promotions are trivial (and even simpler than that)". 2) "SB doesn't work that way. A pawn stays a pawn until a piece X is captured. Only then it's replaced by X. There's no 'looking back' to see if the black king would've been in a selfcheck were that pawn piece X". commenting the following PG that I presented, Roberto Osorio - RML february 16th 2006 rnb2bnk/pppp1p2/1q1p4/8/7p/2N5/PQP1P1PP/R1B1KBNR PG in 22 single moves Singular on GOS>> ---------------------------------------------------------------------------------- Solution, a) Stipulation: single box type II b)sequence: 1.- d4,h5 2.- d5,h4 3.- d6,exd6 4.- f4,Qf6 5.- f5,Qxb2 6.- f6,Qb6 7.- f6xg7,ke7 8.- g7xh8,Kf6(h8 can't be bishop or queen) 9.- Qd4+,Kg6(h8 can't be a knight) 10.- Qb2,Kh7(h8 can't be a rook) 11.- Nc8,Kxh8 (Schoenebelen pawn). I think that the following will clarify both points: 1) I agree that with SingleBox (SB) Schnoebelen promotions are trivial; but this PG is not just SB but a "Singular PG on GOS". Perhaps I should discussed the concept a bit more, since it was lightly presented two years ago. The basic definitions are, - Geometrically Orthodox Stipulations (GOS): the chess stipulations where the pieces' movements (from square to square) follows the FIDE rules in terms of its geometry (Orhodox, Madrasi, Koko, Single Box Type II,Lortap, Patrol, Multicapture, etc), but not necesarily in terms of oportunity (related to check situations). Two aspects could be identified in these stipulations compared to the orthodox one, a) Restriction: moves that are not feasible in the involved stipulation (for instance, under Madrasi paralysis) but they would be legal in orthodox chess. b) Potentiation: the opposal to a), i.e., moves that are legal in the stipulation but illegal in orthodox chess (this is always related to the King path as a result of the check power vanishing; for instance, a King moving to be in contact with an other side's queen wich is paralyzed in Madrasi). - GOS as an extended space: let's say that when we establish in orthodox chess "PG in 22 single moves", we are referring to the math space that includes all the legal sequences showing 22 single moves, asking to find within this space the "unique" sequence that reaches the position. To simplify the things, let's close the set and define GOS=(Orhodox, Madrasi, Koko, Single Box Type II, Lortap, Patrol, Multicapture), i.e., all these stipulations as part of the same space. Then, "PG in 22 single moves Singular on GOS" means that there is just one sequence PERTAINING TO A JUST ONE OF THESE STIPULATIONS that reaches the position in 22 single moves. Then, the solver has to find first which is the necesary stipulation and secondly the sequence. 2) After this explanation, it could be appreciated that the above PG HAS NO ORTHODOX SOLUTION (and no solution in any GOS stipulation other than SB type II); for this reason, it's "Singular". The comments in the solution ("h8 can't be bishop or queen", etc) are to explain "why" SB type II is indispensable to reach the position in 22 single moves. I see two interesting compositional lines based on "Singular PGs": a) paradoxical tries, as it was pointed out by Andrey Frolkin in 2006; b) stipulation twins / two solutions, a strong field. I have no example. It would be nice to see one. Best, Roberto From shaul613_1 at yahoo.com Sat Dec 20 14:59:39 2008 From: shaul613_1 at yahoo.com (Shaul Horwitz) Date: Sat, 20 Dec 2008 11:59:39 -0800 (PST) Subject: [Retros] obtaining Ceriani's books Message-ID: <752145.53565.qm@web53909.mail.re2.yahoo.com> I have tried to contact Dr. PierLuigi Molinari at +39-02-58309137, but was told that the number is not in service. ?Is there anyway to obtain Ceriani's books- maybe someone has an updated phone number? ?Thank you very much, -------------- next part -------------- An HTML attachment was scrubbed... URL: From Pastmaker at aol.com Sat Dec 20 22:50:12 2008 From: Pastmaker at aol.com (Pastmaker at aol.com) Date: Sat, 20 Dec 2008 22:50:12 EST Subject: [Retros] Retro_snippets_001 - Schnoebelen Promotion Message-ID: Ceriani's 1948 task challenge (promoted unit remains on promotion square for at least one move before being captured there), clearly proposed under orthodox retroanalysis (not proof game), was very interesting, and certainly difficult. I have intentionally refrained from looking at the examples Ceriani gave, and still have not looked as of writing this, so my apologies if the following realization was anticipated by Ceriani (or anyone else). I also apologize for the King in check in the diagram, and, of course, for any unsoundness. Ceriani 1948 task: [8/2pp1pp1/2p5/p7/P4PPP/2PPPRRp/1PrqkB2/2bbrBKN (14,13) Last 14 single moves?] Regards to all, Thomas Volet ************** A Good Credit Score is 700 or Above. See yours in just 2 easy steps! (http://pr.atwola.com/promoclk/100000075x1215047751x1200957972/aol?redir=http://www.freecreditreport.com/pm/default.aspx?sc=668072%26hmpgID =62%26bcd=DecemailfooterNO62) -------------- next part -------------- An HTML attachment was scrubbed... URL: From Jens.Guballa at online.de Mon Dec 22 06:36:23 2008 From: Jens.Guballa at online.de (Jens Guballa) Date: Mon, 22 Dec 2008 12:36:23 +0100 Subject: [Retros] Stuttgarter Zeitung: Christmas Contest Message-ID: <20081222123623.216709b8@zulu> Dear retro friends, the traditional chess solving contest of the "Stuttgarter Zeitung" has been published last Saturday. Here is my translated summary of the chess column by Harald Keilhack: Among the senders of correct solutions for problem A and B the following prices are drawn by lot: - a Falk navigation system E30 - an Apple i-Pod "nano" 4GB - a Panasonic micro wave "NN-K125M" Take care, that after the retraction, the removal or addition of a chess man a legal position occurs, and take care which side has the move, respectively can have the move. If black has no last move - as the case may be - he might checkmate. For the retractor problems B and E each party decides by itself if and by the case which chess man is uncaptured. In addition please check if more than one solution exists. Have fun solving and commenting! A: Werner Keym +---+---+---+---+---+---+---+---+ | Q | | | | | | | | +---+---+---+---+---+---+---+---+ | | K | | | | | | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ | | | | p | | | | | +---+---+---+---+---+---+---+---+ | | | | | | | R | | +---+---+---+---+---+---+---+---+ | | | | | | k | | | +---+---+---+---+---+---+---+---+ | | | | | R | | N | | +---+---+---+---+---+---+---+---+ | | | | | | | | N | +---+---+---+---+---+---+---+---+ [Q7/1K6/8/3p4/6R1/5k2/4R1N1/7N] Remove a chess man. Then checkmate in two moves. (6+2-1) B: G?nther Weeth +---+---+---+---+---+---+---+---+ | | | | | k | | | r | +---+---+---+---+---+---+---+---+ | | K | p | R | | | | | +---+---+---+---+---+---+---+---+ | | | | | | | | p | +---+---+---+---+---+---+---+---+ | | | | | N | P | | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ [4k2r/1KpR4/7p/4NP2/8/8/8/8] White retracts his last move and instead checkmates in two moves. (4+4) And now for the experts three additional problems. For E, it is important to keep the initiative by clever uncaptures with retroanalytic constraints. All senders of correct solutions will be published and they receive a book price. C: G?nther Weeth / Werner Keym +---+---+---+---+---+---+---+---+ | | | | | | K | | k | +---+---+---+---+---+---+---+---+ | | | | | | | | p | +---+---+---+---+---+---+---+---+ | | | | | P | | | | +---+---+---+---+---+---+---+---+ | | | | | | P | P | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ [5K1k/7p/4P3/5PP1/8/8/8/8] Add a pawn and an additional chess man, so that the last move giving check is unique. One solution is given: +bPd5, +wBa1. Unique last move was e5-e6+. (4+4+2) D: G?nther Weeth +---+---+---+---+---+---+---+---+ | n | | | | n | | | | +---+---+---+---+---+---+---+---+ | B | | p | p | | Q | p | p | +---+---+---+---+---+---+---+---+ | p | p | | P | | P | B | | +---+---+---+---+---+---+---+---+ | | | | K | p | P | | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ | | | N | k | | | | | +---+---+---+---+---+---+---+---+ | | | R | P | | P | | P | +---+---+---+---+---+---+---+---+ | | b | | | R | | | | +---+---+---+---+---+---+---+---+ [n3n3/B1pp1Qpp/pp1P1PB1/3KpP2/8/2Nk4/2RP1P1P/1b2R3] Add a black knight or bishop (JG: in German it is called "Leichtfigur", = light piece?), then checkmate in two moves. (13+11+1) E: G?nther Weeth / Werner Keym +---+---+---+---+---+---+---+---+ | | | | | k | b | K | Q | +---+---+---+---+---+---+---+---+ | | | p | R | p | | p | r | +---+---+---+---+---+---+---+---+ | p | | | p | | | | P | +---+---+---+---+---+---+---+---+ | P | p | P | | | p | | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ | | P | | | | | | P | +---+---+---+---+---+---+---+---+ | | | | | P | P | P | | +---+---+---+---+---+---+---+---+ | | | | | | B | | | +---+---+---+---+---+---+---+---+ [4kbKQ/2pRp1pr/p2p3P/PpP2p2/8/1P5P/4PPP1/5B2] White and black retract as less moves as possible, whereas black tries to defend, then checkmate in one move. (12+10) Send your solutions until 15. of January latest (post stamp) to: Stuttgarter Zeitung (Schach) Postfach 106032 70049 Stuttgart Germany Enjoy the contest. I wish you a Merry Christmas and all the best for the year 2009. Best regards Jens From francois.perruchaud at wanadoo.fr Mon Dec 22 09:47:56 2008 From: francois.perruchaud at wanadoo.fr (=?UTF-8?B?RnJhbsOnb2lzIFBlcnJ1Y2hhdWQ=?=) Date: Mon, 22 Dec 2008 15:47:56 +0100 Subject: [Retros] Absence (was: Stuttgarter Zeitung: Christmas Contest) Message-ID: <494FA89C.2070406@wanadoo.fr> An HTML attachment was scrubbed... URL: From francois.perruchaud at wanadoo.fr Mon Dec 22 09:58:15 2008 From: francois.perruchaud at wanadoo.fr (=?ISO-8859-1?Q?Fran=E7ois_Perruchaud?=) Date: Mon, 22 Dec 2008 15:58:15 +0100 Subject: [Retros] Absence (was: Absence (was: Stuttgarter Zeitung: Christmas Contest)) Message-ID: <494FAB07.1030809@wanadoo.fr> An HTML attachment was scrubbed... URL: From francois.perruchaud at wanadoo.fr Mon Dec 22 10:08:15 2008 From: francois.perruchaud at wanadoo.fr (=?ISO-8859-1?Q?Fran=E7ois_Perruchaud?=) Date: Mon, 22 Dec 2008 16:08:15 +0100 Subject: [Retros] Absence (was: Absence (was: Absence (was: Stuttgarter Zeitung: Christmas Contest))) Message-ID: <494FAD5F.6060705@wanadoo.fr> An HTML attachment was scrubbed... URL: From francois.perruchaud at wanadoo.fr Mon Dec 22 10:18:15 2008 From: francois.perruchaud at wanadoo.fr (=?ISO-8859-1?Q?Fran=E7ois_Perruchaud?=) Date: Mon, 22 Dec 2008 16:18:15 +0100 Subject: [Retros] Absence (was: Absence (was: Absence (was: Absence (was: Stuttgarter Zeitung: Christmas Contest)))) Message-ID: <494FAFB7.5050004@wanadoo.fr> An HTML attachment was scrubbed... URL: From francois.perruchaud at wanadoo.fr Mon Dec 22 10:28:15 2008 From: francois.perruchaud at wanadoo.fr (=?ISO-8859-1?Q?Fran=E7ois_Perruchaud?=) Date: Mon, 22 Dec 2008 16:28:15 +0100 Subject: [Retros] Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Stuttgarter Zeitung: Christmas Contest))))) Message-ID: <494FB20F.6080904@wanadoo.fr> An HTML attachment was scrubbed... URL: From joost at sanguis.xs4all.nl Mon Dec 22 10:32:08 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Mon, 22 Dec 2008 16:32:08 +0100 (CET) Subject: [Retros] Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Stuttgarter Zeitung: Christmas Contest))))) In-Reply-To: <494FB20F.6080904@wanadoo.fr> References: <494FB20F.6080904@wanadoo.fr> Message-ID: I have disabled Francois' account on the mailinglist due to a mailloop. Francois, when you're back, you can mail me, and I will enable your account again. Joost From francois.perruchaud at wanadoo.fr Mon Dec 22 10:38:15 2008 From: francois.perruchaud at wanadoo.fr (=?ISO-8859-1?Q?Fran=E7ois_Perruchaud?=) Date: Mon, 22 Dec 2008 16:38:15 +0100 Subject: [Retros] Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Stuttgarter Zeitung: Christmas Contest)))))) Message-ID: <494FB467.1000801@wanadoo.fr> An HTML attachment was scrubbed... URL: From francois.perruchaud at wanadoo.fr Mon Dec 22 12:34:42 2008 From: francois.perruchaud at wanadoo.fr (=?ISO-8859-1?Q?Fran=E7ois_Perruchaud?=) Date: Mon, 22 Dec 2008 18:34:42 +0100 Subject: [Retros] Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Stuttgarter Zeitung: Christmas Contest))))))) Message-ID: <494FCFB2.8070306@wanadoo.fr> An HTML attachment was scrubbed... URL: From francois.perruchaud at wanadoo.fr Mon Dec 22 12:45:07 2008 From: francois.perruchaud at wanadoo.fr (=?windows-1252?Q?Fran=E7ois_Perruchaud?=) Date: Mon, 22 Dec 2008 18:45:07 +0100 Subject: [Retros] Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Stuttgarter Zeitung: Christmas Contest)))))))) Message-ID: <494FD223.6050704@wanadoo.fr> An HTML attachment was scrubbed... URL: From francois.perruchaud at wanadoo.fr Mon Dec 22 12:55:04 2008 From: francois.perruchaud at wanadoo.fr (=?windows-1252?Q?Fran=E7ois_Perruchaud?=) Date: Mon, 22 Dec 2008 18:55:04 +0100 Subject: [Retros] Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Stuttgarter Zeitung: Christmas Contest))))))))) Message-ID: <494FD478.90604@wanadoo.fr> An HTML attachment was scrubbed... URL: From francois.perruchaud at wanadoo.fr Mon Dec 22 13:05:04 2008 From: francois.perruchaud at wanadoo.fr (=?windows-1252?Q?Fran=E7ois_Perruchaud?=) Date: Mon, 22 Dec 2008 19:05:04 +0100 Subject: [Retros] Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Absence (was: Stuttgarter Zeitung: Christmas Contest)))))))))) Message-ID: <494FD6D0.8070202@wanadoo.fr> An HTML attachment was scrubbed... URL: From francois.perruchaud at wanadoo.fr Mon Dec 22 15:15:05 2008 From: francois.perruchaud at wanadoo.fr (=?UTF-8?B?RnJhbsOnb2lzIFBlcnJ1Y2hhdWQ=?=) Date: Mon, 22 Dec 2008 21:15:05 +0100 Subject: [Retros] Bad loop In-Reply-To: <20081222123623.216709b8@zulu> References: <20081222123623.216709b8@zulu> Message-ID: <494FF549.8040507@wanadoo.fr> Dear retro friends, I feel very confused about the trouble I brought. The problem was a bad result of a test on my e-mail client Thunderbird. Strangely, I'm not absent ! A few weeks ago, I tested a filter to send back messages. The keyword was *test* in the "Subject" field. I tested the filter (It worked fine...), and ... completely forgot to delete it. Today, - my computer was on, Thunderbird was open and I had to leave, - Thunderbird received a message with the right keyword (Christmas con*test*), - unfortunately, it was a message from a mailing list. and the loop began... Do forgive my stupidity. I just hope it can give somebody an idea for a retro problem ! Regards, Fran?ois Perruchaud From Jens.Guballa at online.de Mon Dec 22 17:51:08 2008 From: Jens.Guballa at online.de (Jens Guballa) Date: Mon, 22 Dec 2008 23:51:08 +0100 Subject: [Retros] Bad loop In-Reply-To: <494FF549.8040507@wanadoo.fr> References: <20081222123623.216709b8@zulu> <494FF549.8040507@wanadoo.fr> Message-ID: <20081222235108.08afc5bd@zulu> Hello Fran?ois, Perruchaud schrieb: > Dear retro friends, > > I feel very confused about the trouble I brought. > The problem was a bad result of a test on my e-mail client > Thunderbird. Strangely, I'm not absent ! > A few weeks ago, I tested a filter to send back messages. The keyword > was *test* in the "Subject" field. > I tested the filter (It worked fine...), and ... completely forgot to > delete it. > Today, > - my computer was on, Thunderbird was open and I had to leave, > - Thunderbird received a message with the right keyword (Christmas > con*test*), > - unfortunately, it was a message from a mailing list. > and the loop began... > > Do forgive my stupidity. > I just hope it can give somebody an idea for a retro problem ! at least the retro contest was worth for something... :-) Never mind... Best regards Jens > > Regards, > Fran?ois Perruchaud > > _______________________________________________ > Retros mailing list > Retros at janko.at > http://www.pairlist.net/mailman/listinfo/retros From Jens.Guballa at online.de Tue Dec 23 08:58:48 2008 From: Jens.Guballa at online.de (Jens Guballa) Date: Tue, 23 Dec 2008 14:58:48 +0100 Subject: [Retros] Stuttgarter Zeitung: Christmas Contest In-Reply-To: <20081222123623.216709b8@zulu> References: <20081222123623.216709b8@zulu> Message-ID: <20081223145848.4ae5c4fc@zulu> Hi all, now the Christmas contest is online (in German only): http://www.kaniaverlag.de/htm/Weihnachts2008.html Best regards Jens From otto at janko.at Fri Dec 26 11:59:50 2008 From: otto at janko.at (Otto Janko) Date: Fri, 26 Dec 2008 17:59:50 +0100 Subject: [Retros] Update if the Retro Corner Message-ID: Dear Retro Friend, The Retro Corner has been updated today: . Stuttgarter Zeitung, Christmas Contest, 2008 . "Partial Retrograde Analysis" and "Retro Strategy" in the modified Codex (by Werner Keym, Meisenheim) More updates will follow in the next few days. Best Regards, - Otto Janko [mailto:otto at janko.at] [http://www.janko.at] -- Those who desire to give up freedom in order to gain security, - will not have, nor do they deserve, either one. [Benjamin Franklin] From joost at sanguis.xs4all.nl Sat Dec 27 07:16:41 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Sat, 27 Dec 2008 13:16:41 +0100 Subject: [Retros] StrateGems 45 (Jan-Mar 2009) Message-ID: <49561CA9.5040606@sanguis.xs4all.nl> R0140v - Ryan McCracken Dedicated to Paul Raican 8/8/8/8/8/8/3r4/B2r4 (1+2) Add wK, bK, 4 wP, 4 bP for a (6+7) IC P0236 - James Soliman rsBqkBsr/p1pppp1p/6p1/1p6/2P1S3/3P4/P4PPP/R1bQKbSR (14+16) SPG 9.0 P0237 - Michael Grushko r1B1r1SR/ppps1p1p/2k3p1/r7/8/2s5/P1PQPPPP/rSB1KBSR (16+13) SPG 9.5 Masand P0238 - Henryk Grudzinski r4rk1/pp1ppppp/8/2P5/8/5S2/P1P1PP1P/RB2K1BR (12+10) SPG 10.5 Take&make P0239 - James Soliman Q5sr/2pp1p1p/sp4rk/p1b1p3/2b4K/SP3P2/P1PPPP1P/R1B2BSR (16+14) SPG 15.5 P0240 - Thomas Sawyer, Ryan McCracken rqksKb1r/R1pppp1p/5s2/P5p1/8/2S2P2/1PPP1PPP/2BQ1BSR (16+13) SPG 16.0 P0241 - James Soliman 3s3R/1ppk1p2/B2p4/B1q1p3/b1Q1P2P/bP1P2P1/1PP2P2/1S2K1Sr (15+11) SPG 17.0 P0242 - Gianni Donati rs1q1rsk/B1pppp1p/1pS2p2/5R2/P7/2P4P/1PP1P2P/1S2K1QR (14+13) SPG 18.0 P0243 - Itamar Faybish 6ss/qbkr2b1/pppppppp/7r/7P/6P1/4P3/RS2K1S1 (7+16) SPG 21.0 Solutions: R0146 - Keith a) With black to move, the position is stalemate, a draw. With white to move, the black king came to b1 through d1 and e2. In monochromatic chess, the white king didn't have to move to allow this. So white wins with 1. OO. b) wRc2 is the promoted wPg2. Since wSb1 never moved, the only lightsquared white piece bPh3 could have captured is the white queen. The other capture must've been the white h-pawn captured en passant. No other light-suqared black pawn could have gotten to the 3rd rank, let alone promote. In order for wPg2 to promote, it had to capture 4 black pieces. wPd3 captured a black piece on d3, another lightsquared piece. bRa8 and bBc8 account for at most two of these captures. If all other captures were whitesquared pieces, they would have been bPf7, bPh7 and bSg8, but this is impossible since bPh3 is either the f- or h-pawn. So one of the other 3 captures was an ep capture. So at least two ep-captures occurred. R0147 - Wenda/Crisan -1. Kg3xBh2[wKe1] Bg1-h2 -2. Bg2xQh3[wBf1] Qh1-h3 -3. Kf2-g3 Bh2-g1 -4. Ke1-f2 Bg1-h2 -5. Kf2xSf3[wKe1] Bh2-g1 -6. Qe3-a7 and 1. Bh3 Qf1# R0148 - Crisan -1. Kg2xRh3[+bRa8,-bBa8] Rf3-h3 -2. Kg3-g2 Rf4-f3 -3. Kf3-g3 Re4-f4 -4. Kf4-f3 Re5-e4 -5. Ke4-f4 Rd5-e5 -6. Ke5-e4 Rd6-d5 -7. Kd5-e5 Rc6-d6 -8. Kd6-d5 Rc7-c6 -9. Kc6-d6 Rb7-c7 -10. Sd6-e8 & 1. Kb7[+bRa8,-bBa8]# P0213v - de Heer 1. e4 a5 2. Qf3 Ra7 3. Qf6 exf6 4. e5 Bc5 5. e6 d6 6. e7 Kd7 7. Kd1 Kc6 8. e8=Q+ Kb6 9. Qe1 Ne7 10. Ke2 Ka6 11. Qd1 Bb6 12. Ke1# P0223 - Belcsak 1. e4 d5 2. ed5[S] Be6[S] 3. Se7[B] Sd7[P] 4. Bf8[R] Sf8[B] 5. Se2[P] Se7[P] P0224 - Buchanan 1. h4 e5 2. h5 Ke7 3. h6 Kf6 4. hxg7 Kg5 5. Nh3+ Kh4 6. gxf8=Q Qg5 7. Qxc8 Nf6 8. Qxc7 Rc8 9. Qxe5 Rc4 10. Qh2 Rg4 11. Ng1# P0225 - Buchanan 1. h4 e6 2. h5 Ke7 3. h6 Qe8 4. hxg7 h5 5. g4 h4 6. g5 h3 7. g6 Kf6 8. gxh8=Q+ Kg5 9. Qe5+ Kh4 10. g7 Ne7 11. g8=R h2 12. Rg2 Ng6 13. Qxh2# P0226 - Soliman 1. a4 c5 2. Ra3 Qc7 3. Rh3 Qxh2 4. Rxh7 Qxh7 5. Rh3 g5 6. Ra3 Bg7 7. b3 Bb2 8. Ra1 Ba3 9. Bb2 c4 10. Bxh8 c3 11. Bd4 f6 12. Bxa7 Kf7 13. Bxb8 Rxa4 14. Bf4 Rxf4 15. d4 P0227 - Osorio, Lois 1. c4 Nf6 2. Qa4 Ne4 3. Qa6 bxa6 4. Nc3 Bb7 5. Nd1 Bd5 6. cxd5 Nc6 7. d6 Qb8 8. dxc7 Nd8 9. c8=Q Qg3 10. Qc2 Nc3 11. e4 Qxg2 12. Bc4 Qg3 13. d3 Qb8 14. Bf4 Nc6 15. Bc7 Qd8 16. f4 Nb8 P0228 - Minerva 1. d4 Nc6 2. d5 Nd4 3. d6 Nxe2 4. dxe7 Nxg1 5. exf8=N Qh4 6. Nxd7 Qa4 7. Nf6+ Nxf6 8. Qd8+ Kxd8 9. Bf4 Bh3 10. Nd2 Bc8 11. O-O-O Bh3 12. g4 Qe8 13. Kb1 Qe1 14. Ne4+ Nd7 15. Bc1 Qa5 16. Rxd7+ Ke8 17. Rxf7 Qh5 18. g5 Bc8 19. Rf5 Qd1 20. f3 Qd8 Cooked by Radovan Tomasevic: 1. d4 Nc6 2. d5 Nd4 3. d6 Nxe2 4. dxe7 Nxg1 5. exf8=R+ Ke7 6. Nc3 Nh6 7. Bxh6 Nh3 8. Ne4 Ng1 9. Rxf7+ Ke8 10. Qxd7+ Bxd7 11. O-O-O Bh3 12. Rdd7 Bxd7 13. Kb1 Bh3 14. Bc1 Bc8 15. g4 Qd1 16. Rf5 Qd8 17. g5 Qd1 18. f3 Qd8 P0229 - Dupont 1. b4 e5 2. b5 e4 3. b6 e3 4. bxa7 b5 5. a4 b4 6. a5 b3 7. Ra4 b2 8. Na3 b1=N 9. a6 Nc3 10. dxc3 exf2+ 11. Kd2 f5 12. e4 f4 13. Bc4 f3 14. Ke3 f1=N+ 15. Kf4 Ng3 16. hxg3 d5 17. Rh6 d4 18. Rd6 d3 19. Be6 d2 20. Kf5 dxc1=N 21. Qd4 Nd3 22. cxd3 f2 23. Nc2 fxg1=N 24. Na1 Nh3 25. gxh3 From G.A.Rol at umcutrecht.nl Tue Dec 30 06:00:16 2008 From: G.A.Rol at umcutrecht.nl (Rol, Guus) Date: Tue, 30 Dec 2008 12:00:16 +0100 Subject: [Retros] On the Jumanji convention In-Reply-To: References: Message-ID: The new article 16 in the Codex - section (3) of which I baptized tongue in cheek as "the Jumanji convention" - offers loads of material for discussion. Werner Keym's clarification in the Retro Corner provides the necessary background for its correct application. Careful reading reveals that it provides not just one but two new meta-rules (meta-conventions if you like), a fancy term for describing "rules about rules". The first one says that "depending on rights analysis one must apply either the RS or the PRA approach to solving the problem", the second one that "in some of these cases the choice for RS or PRA further depends on which one provides the most technically correct and content rich solution to the problem". For the sake of simplicity one wonders why not just one these meta-rules would suffice to achieve the objective of article 16 section (3). The author explains that choosing between the RS and PRA approach in mutually exclusive castling situations has proven to be self-evident, but he omits claiming why this is not true for the other right combinations. Actually, I am pretty sure the choice is just as easy there and there is always the escape route in the RS/PRA addition to the stipulation. Example IV (Ceriani) shows "2 mutually exclusive castlings (black and white) and one e.p". Is this so different from showing "1 white castling mutually exlusive with either of the black castlings" or "2 mutually exclusive white castlings and an e.p. move" that it warrants treatment by a different meta-rule? No, it is not, and anyone new to this field would immediately agree to that. Which points us to the political source of the distinction. In retro chess history "mutually exclusive castling", like Excalibur after many battles, has become the pre-eminent mythical retro-object, apparently deserving of a deus ex machina convention all of its own. This is even stranger when you consider that article 16, section (1) just by itself generates the mutually exclusive castling phenomenon without the slightest need to ever identify such a relationship. The new article 16, with its historical ballast, will only contaminate the logical character of the retro-space by inserting an arbitrary distinction and this may deter potential participants in composing and solving retro-problems. Article 16, section (3) has been named "the PRA convention", probably since it reintroduced the obsoleted PRA term. I will not discuss the rationale behind the renovated terminolgy at this point, but it should be noted that section (3) is mainly dedicated to "the separation of RS and PRA logics". The pendulum has swung from the mundane mind (the what you can get away with RS-logic) to the scientific mind (the conditional truth PRA/RV-logic). In doing so, once again the opportunity has been missed for a principle based generic approach to the logics. PRA has been specifically restricted to handle the castling and e.p. cases only, ignoring the potential of repetition and 50M rules/conventions. More importanly, it does not consider the scalability of retro-logics into fairy-areas. Look e.g. at the implications of evaluating "castling rights" in Circe in conjunction with the resurrection of rooks! Not mentioning "variable pieces" or "fuddled men" etc which will totally take your head off. Isn't it funny that most of the chess rules are comfortably replicated across the fairy-domain, but when it comes to transforming the retro-logics, the required toolkit seems to be completely missing? Guus Rol. -----Oorspronkelijk bericht----- Van: retros-bounces at janko.at [mailto:retros-bounces at janko.at] Namens Otto Janko Verzonden: vrijdag 26 december 2008 18:00 Aan: Retros Onderwerp: [Retros] Update if the Retro Corner Dear Retro Friend, The Retro Corner has been updated today: . Stuttgarter Zeitung, Christmas Contest, 2008 . "Partial Retrograde Analysis" and "Retro Strategy" in the modified Codex (by Werner Keym, Meisenheim) More updates will follow in the next few days. Best Regards, - Otto Janko [mailto:otto at janko.at] [http://www.janko.at] -- Those who desire to give up freedom in order to gain security, - will not have, nor do they deserve, either one. [Benjamin Franklin] _______________________________________________ Retros mailing list Retros at janko.at http://www.pairlist.net/mailman/listinfo/retros