From joost at sanguis.xs4all.nl Thu Sep 4 12:01:56 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Thu, 04 Sep 2008 18:01:56 +0200 Subject: [Retros] Probleemblad 2-2008 Message-ID: <48C00674.4040009@sanguis.xs4all.nl> R336 - Eyjolfur Eyjolfsson rSBqs1S1/p1pp1qp1/1pr1pp2/8/7B/P7/P1PP1PPP/R2QKbsR (15+14) +---+---+---+---+---+---+---+---+ |*R | S | B |*Q |*S | . | S | . | +---+---+---+---+---+---+---+---+ |*P | |*P |*P | . |*Q |*P | | +---+---+---+---+---+---+---+---+ | |*P |*R | . |*P |*P | | . | +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | | +---+---+---+---+---+---+---+---+ | | . | | . | | . | | B | +---+---+---+---+---+---+---+---+ | P | | . | | . | | . | | +---+---+---+---+---+---+---+---+ | P | . | P | P | | P | P | P | +---+---+---+---+---+---+---+---+ | R | | . | Q | K |*B |*S | R | +---+---+---+---+---+---+---+---+ SPG 17.0 R337 - Jorge Lois, Roberto Osorio rB1q1bsr/p1Rp1pkp/1psp1p2/2p2P2/5K2/5S2/PPPS1PPP/3B4 (13+15) +---+---+---+---+---+---+---+---+ |*R | B | |*Q | |*B |*S |*R | +---+---+---+---+---+---+---+---+ |*P | | R |*P | . |*P |*K |*P | +---+---+---+---+---+---+---+---+ | |*P |*S |*P | |*P | | . | +---+---+---+---+---+---+---+---+ | . | |*P | | . | P | . | | +---+---+---+---+---+---+---+---+ | | . | | . | | K | | . | +---+---+---+---+---+---+---+---+ | . | | . | | . | S | . | | +---+---+---+---+---+---+---+---+ | P | P | P | S | | P | P | P | +---+---+---+---+---+---+---+---+ | . | | . | B | . | | . | | +---+---+---+---+---+---+---+---+ SPG 19.0 R338 - Henryk Grudzinski, Falk Tippmann rs2k1sr/4b3/b3q3/8/1p1p1p1p/p1p1p1p1/PPPPPPPP/RSBQKBSR (16+16) +---+---+---+---+---+---+---+---+ |*R |*S | | . |*K | . |*S |*R | +---+---+---+---+---+---+---+---+ | . | | . | |*B | | . | | +---+---+---+---+---+---+---+---+ |*B | . | | . |*Q | . | | . | +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | | +---+---+---+---+---+---+---+---+ | |*P | |*P | |*P | |*P | +---+---+---+---+---+---+---+---+ |*P | |*P | |*P | |*P | | +---+---+---+---+---+---+---+---+ | P | P | P | P | P | P | P | P | +---+---+---+---+---+---+---+---+ | R | S | B | Q | K | B | S | R | +---+---+---+---+---+---+---+---+ SPG 14.0, Sentinelles R339 - Vlaicu Crisan, Paul Raican 8/p7/7K/2s1p3/1ss5/8/8/8 (1+5) +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | +---+---+---+---+---+---+---+---+ |*P | | . | | . | | . | | +---+---+---+---+---+---+---+---+ | | . | | . | | . | | K | +---+---+---+---+---+---+---+---+ | . | |*S | |*P | | . | | +---+---+---+---+---+---+---+---+ | |*S |*S | . | | . | | . | +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | | +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | | +---+---+---+---+---+---+---+---+ -1 & h#1, Helpretractor, Circe Assassin b) a7->d7 R340 - Klaus Wenda 5qBR/5P1R/5P2/4B3/4p3/4p2k/4p2p/4K2b (7+7) +---+---+---+---+---+---+---+---+ | | . | | . | |*Q | B | R | +---+---+---+---+---+---+---+---+ | . | | . | | . | P | . | R | +---+---+---+---+---+---+---+---+ | | . | | . | | P | | . | +---+---+---+---+---+---+---+---+ | . | | . | | B | | . | | +---+---+---+---+---+---+---+---+ | | . | | . |*P | . | | . | +---+---+---+---+---+---+---+---+ | . | | . | |*P | | . |*K | +---+---+---+---+---+---+---+---+ | | . | | . |*P | . | |*P | +---+---+---+---+---+---+---+---+ | . | | . | | K | | . |*B | +---+---+---+---+---+---+---+---+ -7 & #1, Proca retractor, Anticirce Joost From joost at sanguis.xs4all.nl Sat Sep 6 06:58:49 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Sat, 06 Sep 2008 12:58:49 +0200 Subject: [Retros] Probleemblad 2-2008 In-Reply-To: <48C00674.4040009@sanguis.xs4all.nl> References: <48C00674.4040009@sanguis.xs4all.nl> Message-ID: <48C26269.2090605@sanguis.xs4all.nl> > R338 - Henryk Grudzinski, Falk Tippmann > rs2k1sr/4b3/b3q3/8/1p1p1p1p/p1p1p1p1/PPPPPPPP/RSBQKBSR (16+16) > SPG 14.0, Sentinelles This is dedicated to J?rg Burkhalter. Joost From joost at sanguis.xs4all.nl Mon Sep 8 02:21:09 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Mon, 8 Sep 2008 08:21:09 +0200 (CEST) Subject: [Retros] Probleemblad 2-2008 In-Reply-To: <48C00674.4040009@sanguis.xs4all.nl> References: <48C00674.4040009@sanguis.xs4all.nl> Message-ID: <20080908082002.H52708@router.joost.localnet> > R336 - Eyjolfur Eyjolfsson > rSBqs1S1/p1pp1qp1/1pr1pp2/8/7B/P7/P1PP1PPP/R2QKbsR (15+14) Typing error, the piece on d8 should be a king. The correct FEN is: rSBks1S1/p1pp1qp1/1pr1pp2/8/7B/P7/P1PP1PPP/R2QKbsR Joost From abrobecker at yahoo.com Mon Sep 8 05:21:58 2008 From: abrobecker at yahoo.com (Alain BROBECKER) Date: Mon, 8 Sep 2008 02:21:58 -0700 (PDT) Subject: [Retros] Retros Digest, Vol 47, Issue 2 In-Reply-To: Message-ID: <361280.14252.qm@web56202.mail.re3.yahoo.com> Dear retro-fans, A new version of length records in "Last single moves" problems is available here: http://abrobecker.free.fr/chess/lengths.pdf Since the last time i posted, new problems are: B4b/2 by Michael Grushko A15/10 by Thierry Le Gleuher A23/41 by Dmitrij Baibikov A24/49 by Dmitrij Baibikov B24/50 by Dmitrij Baibikov C17/16 by Dmitrij Baibikov C23/50 by Dmitrij Baibikov C24/54 by Dmitrij Baibikov D16/7 by Dmitrij Baibikov D25/45 by Dmitrij Baibikov D26/49 by Dmitrij Baibikov E23/4 by Dmitrij Baibikov Please report any error and advertise it as widely as possible. best regards, Alain Alain Brobecker (abrobecker at yahoo.com) |_ _ _ |_ http://abrobecker.free.fr/ |_)(_|(_|| ) of Arm's Tech From otto at janko.at Fri Sep 12 16:05:58 2008 From: otto at janko.at (Otto Janko) Date: Fri, 12 Sep 2008 22:05:58 +0200 Subject: [Retros] Update of the Retro Corner Message-ID: <000001c91512$fa0c1420$4a00a8c0@ww300.siemens.net> Dear Retro Friend, After a long time the Retro Corner has been updated today: A) Retro Problems: Probleemblad, Jan-Mar 2008 Probleemblad, Apr-Jun 2008 Die Schwalbe, No. 228, December 2007 Die Schwalbe, No. 229, February 2008 Die Schwalbe, No. 230, April 2008 Die Schwalbe, No. 231, June 2008 Die Schwalbe, No. 232, August 2008 feenschach, No. 166, December 2006 feenschach, No. 168, Summer 2007 StrateGems, No. 42, Apr-Jun 2008 StrateGems, No. 43, Jul-Sep 2008 The Problemist, March 2008 The Problemist, May 2008 The Problemist, July 2008 B) Retro Glossary: Messigny Chess Hydra Circe Sentinel Chess (Sentry Chess) K?ko Chess (Contact Chess) Locust Hamster 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 Fri Sep 12 16:30:19 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Fri, 12 Sep 2008 22:30:19 +0200 Subject: [Retros] Originals from Silvio Baier's article In-Reply-To: <48AFEDE6.5080606@sanguis.xs4all.nl> References: <48AFEDE6.5080606@sanguis.xs4all.nl> Message-ID: <48CAD15B.8080207@sanguis.xs4all.nl> Joost de Heer schreef: > All originals are by SB. He tried to show economical representations of > the Pronkin theme (a piece is captured, and a promoted piece takes its > place on the homesquare). > > Economy criteria used: > - The number of unthematic captures should be minimal (ideally 0) > - The number of moves should be minimal > - The number of officers on their homesquare should be as large as possible I've found improvements for s, QR and RR (one more piece at home), and RB (one less move). All these are C+. s(11.0;): rsbqkbsr/ppp1pppp/8/5B2/4PB2/1Q2P3/PPP2PPP/RS2K1SR QR(15,5;25): 1sbqkb1r/1pp1p1pp/8/2p2p2/1r5s/1p6/1PP1PPPP/RSBQKBSR RR(15,5;25): rsbqkb2/1pp1ppp1/8/1p1p4/4r3/2s3p1/1PPPPPP1/RSBQKBSR RB(15,5;22): rs2k1s1/ppp3p1/1rp2p2/4p2b/6p1/bq6/PPP1PPP1/RSBQKBSR Joost From joost at sanguis.xs4all.nl Sat Sep 13 06:46:59 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Sat, 13 Sep 2008 12:46:59 +0200 Subject: [Retros] Originals from Silvio Baier's article In-Reply-To: <48CAD15B.8080207@sanguis.xs4all.nl> References: <48AFEDE6.5080606@sanguis.xs4all.nl> <48CAD15B.8080207@sanguis.xs4all.nl> Message-ID: <48CB9A23.7090100@sanguis.xs4all.nl> > RB(15,5;22): rs2k1s1/ppp3p1/1rp2p2/4p2b/6p1/bq6/PPP1PPP1/RSBQKBSR RB(15,5;23): rs2k1s1/ppp2pp1/1rp5/4p2b/6pb/1q6/PPP1PPP1/RSBQKBSR Joost From abrobecker at yahoo.com Mon Sep 15 05:10:13 2008 From: abrobecker at yahoo.com (Alain BROBECKER) Date: Mon, 15 Sep 2008 02:10:13 -0700 (PDT) Subject: [Retros] Lengths records, again In-Reply-To: Message-ID: <971431.87515.qm@web56203.mail.re3.yahoo.com> Dear retro fans, Thierry Le Gleuher corrected some piece counting in the length records: http://abrobecker.free.fr/chess/lengths.pdf regards, Alain Alain Brobecker (abrobecker at yahoo.com) |_ _ _ |_ http://abrobecker.free.fr/ |_)(_|(_|| ) of Arm's Tech From liskov at im.bas-net.by Mon Sep 15 06:55:37 2008 From: liskov at im.bas-net.by (Valery Liskovets) Date: Mon, 15 Sep 2008 13:55:37 +0300 Subject: [Retros] PRA & RS: Jurmala-2008 vs Piran-1958 References: <000001c91512$fa0c1420$4a00a8c0@ww300.siemens.net> Message-ID: <48CE3F28.8A2F46D8@im.bas-net.by> Dear retro-friends, (Retro-)Article 16 of the Codex was radically modified at the 51st Meeting of the PCCC in Jurmala (Latvia) on Sept. 6, 2008 (mostly due to efforts of W.Keym and b.ellinghoven). See http://www.saunalahti.fi/~stniekat/pccc/codex.htm#b19 Valery L. "Article 16 - Castling and En-passant capture (1) Castling convention. Castling is permitted unless it can be proved that it is not permissible. (2) En-passant convention. An en-passant capture on the first move is permitted only if it can be proved that the last move was the double step of the pawn which is to be captured [20]. (3) Partial Retrograde Analysis (PRA) convention. Where the rights to castle and/or to capture en-passant are mutually dependent, the solution consists of several mutually exclusive parts. All possible combinations of move rights, taking into account the castling convention and the en-passant convention, form these mutually dependent parts. In the special case where White's right to castle excludes Black's right to castle (and vice versa), an alternative is possible: the party exercising this right first is entitled to castle (Retro Strategy (RS) convention). (4) Other conventions should be expressly stipulated, for example if in the course of the solution an en-passant capture has to be legalised by subsequent castling (a posteriori convention AP)." From joost at sanguis.xs4all.nl Mon Sep 15 07:37:40 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Mon, 15 Sep 2008 13:37:40 +0200 (CEST) Subject: [Retros] PRA & RS: Jurmala-2008 vs Piran-1958 In-Reply-To: <48CE3F28.8A2F46D8@im.bas-net.by> References: <000001c91512$fa0c1420$4a00a8c0@ww300.siemens.net> <48CE3F28.8A2F46D8@im.bas-net.by> Message-ID: <20080915133635.N71069@router.joost.localnet> Has anyone made a comparison between the previous article and the current one? Joost From otto at janko.at Mon Sep 15 07:49:11 2008 From: otto at janko.at (Otto Janko) Date: Mon, 15 Sep 2008 13:49:11 +0200 Subject: [Retros] Another update of the Retro Corner Message-ID: <000301c91729$1434c370$3900a8c0@ww300.siemens.net> Another update of the Retro Corner: - Orbit, No. 37 & No. 38, 2008 - Ph?nix, No. 157, Dec. 2006 - Ph?nix, No. 161, Apr. 2007 - Ph?nix, No. 164, Jul. 2007 - Ph?nix, No. 168, Dec. 2007 What is still missing on the Retro Corner? Thema Danicum 124ff diagrammes 127-137,139ff Europe Echecs 422, 466, 469 Phenix Apr.2006, Apr.2008ff Probleemblad Jan.2005-Jul.2006, Jul.2008ff The Problemist Jan.1999-Jan.2000, May.2000, Sep.2000-Mar.2002 Jul.2002-Sep-2002, Jan.2004-Mar.2003, Sep.2003-Nov.2003 May.2004-Sep.2006, Jan.2008, Sep.2008ff Die Schwalbe 1-147, 233ff StrateGems 5, 44ff Thema Danicum 1-80, 124ff ~?tt?~ From Nicolas.Dupont at math.univ-lille1.fr Mon Sep 15 08:23:02 2008 From: Nicolas.Dupont at math.univ-lille1.fr (Nicolas.Dupont at math.univ-lille1.fr) Date: Mon, 15 Sep 2008 14:23:02 +0200 (CEST) Subject: [Retros] Another update of the Retro Corner In-Reply-To: <000301c91729$1434c370$3900a8c0@ww300.siemens.net> References: <000301c91729$1434c370$3900a8c0@ww300.siemens.net> Message-ID: <2750.81.20.215.22.1221481382.squirrel@mathwebmail.univ-lille1.fr> > What is still missing on the Retro Corner? Backhome chess in the Retro Glossary ? Nicolas. From liskov at im.bas-net.by Mon Sep 15 09:20:38 2008 From: liskov at im.bas-net.by (Valery Liskovets) Date: Mon, 15 Sep 2008 16:20:38 +0300 Subject: [Retros] PRA & RS: Jurmala-2008 vs Piran-1958 References: <000001c91512$fa0c1420$4a00a8c0@ww300.siemens.net> <48CE3F28.8A2F46D8@im.bas-net.by> <20080915133635.N71069@router.joost.localnet> Message-ID: <48CE6125.703106F1@im.bas-net.by> For the first time: - "PRA" and "RS" are introduced and defined; - PRA doesn't need to be stipulated. VL Joost de Heer wrote: > Has anyone made a comparison between the previous article and the current > one? > > Joost > > _______________________________________________ > Retros mailing list > Retros at janko.at > http://www.pairlist.net/mailman/listinfo/retros From mri_two at t-online.de Mon Sep 15 09:44:38 2008 From: mri_two at t-online.de (Mario Richter) Date: Mon, 15 Sep 2008 15:44:38 +0200 Subject: [Retros] PRA & RS: Jurmala-2008 vs Piran-1958 References: <000001c91512$fa0c1420$4a00a8c0@ww300.siemens.net><48CE3F28.8A2F46D8@im.bas-net.by> <20080915133635.N71069@router.joost.localnet> Message-ID: <001501c91739$32bf6ab0$0100a8c0@he2p306> Joost wrote: > Has anyone made a comparison between the previous article and the current > one? Here is the text of article 16 as of November 2007: Article 16 - Dependent Moves (1) Castling is deemed to be permissible unless it can be proved that it is not permissible. An en-passant capture is permissible on the first move only if it can be proved that the last move was the double-step of the pawn to be captured. (*20) (2) In case of mutual dependency of catling rights of each party, the party exercising this right first is entitled to do so. Other conventions (which also affect other rights to move) should be expressly stipulated, for exam- ple: (a) If an en-passant capture in the course of the solu- tion has to be legalized by a subsequent castling (for example AP). (b) If several possibilities that result in several solu- tions are to be distinguished in the retro play, i.e. in the proof game or in some parts of it, then these pos- sibilities are called retro-variants (for example RV). (*20) In determining the permissibility of these features, account must be taken of which party is to move first. Regards, mario From pascal.wassong at free.fr Mon Sep 15 16:02:34 2008 From: pascal.wassong at free.fr (Pascal Wassong) Date: Mon, 15 Sep 2008 22:02:34 +0200 Subject: [Retros] Another update of the Retro Corner In-Reply-To: <000301c91729$1434c370$3900a8c0@ww300.siemens.net> (Otto Janko's message of "Mon\, 15 Sep 2008 13\:49\:11 +0200") References: <000301c91729$1434c370$3900a8c0@ww300.siemens.net> Message-ID: <877i9d41ph.fsf@free.fr> Hello, I checked in my collection of Europe Echecs the 3 numbers that are missing: 422 contains the judgment by Wolfgang Dittmann for 1991 - 1992. It contains no originals. 466 contains an article by Michel Caillaud, about Andr? Hazebrouck. It contains no originals. I don't have N?469. At that time, I bought Europe Echecs only when it contained retro problems. As this is the moment where Andr? Hazebrouck stopped the column in Europe Echecs, and just some month before the column completely disappeared, I think that issu 469 didn't contain any originals. The last number I have is 471, which is the last number containing originals. Pascal >>>>> "Otto" == Otto Janko writes: Otto> Another update of the Retro Corner: - Orbit, No. 37 & Otto> No. 38, 2008 - Ph?nix, No. 157, Dec. 2006 - Ph?nix, No. 161, Otto> Apr. 2007 - Ph?nix, No. 164, Jul. 2007 - Ph?nix, No. 168, Otto> Dec. 2007 Otto> What is still missing on the Retro Corner? Otto> Thema Danicum 124ff diagrammes 127-137,139ff Europe Echecs Otto> 422, 466, 469 Phenix Apr.2006, Apr.2008ff Probleemblad Otto> Jan.2005-Jul.2006, Jul.2008ff The Problemist Otto> Jan.1999-Jan.2000, May.2000, Sep.2000-Mar.2002 Otto> Jul.2002-Sep-2002, Jan.2004-Mar.2003, Sep.2003-Nov.2003 Otto> May.2004-Sep.2006, Jan.2008, Sep.2008ff Die Schwalbe 1-147, Otto> 233ff StrateGems 5, 44ff Thema Danicum 1-80, 124ff Otto> ~?tt?~ Otto> _______________________________________________ Retros Otto> mailing list Retros at janko.at Otto> http://www.pairlist.net/mailman/listinfo/retros From t.legleuher at hotmail.fr Tue Sep 16 15:25:15 2008 From: t.legleuher at hotmail.fr (Thierry LE GLEUHER) Date: Tue, 16 Sep 2008 21:25:15 +0200 Subject: [Retros] Another update of the Retro Corner In-Reply-To: <000301c91729$1434c370$3900a8c0@ww300.siemens.net> References: <000301c91729$1434c370$3900a8c0@ww300.siemens.net> Message-ID: Exceptionally there is no regular unpublished problem in Ph?nix 150. Between Ph?nix 146 and Ph?nix 153 we can find only: Unpublished problems from Messigny 2005 in Ph?nix 148-149 (February-March 2006)Awards (retro 1995-96 and retro 2000) in Ph?nix 150 (April 2006) Sincerely Thierry > From: otto at janko.at> To: retros at janko.at> Date: Mon, 15 Sep 2008 13:49:11 +0200> Subject: [Retros] Another update of the Retro Corner> > Another update of the Retro Corner:> > - Orbit, No. 37 & No. 38, 2008 > - Ph?nix, No. 157, Dec. 2006 > - Ph?nix, No. 161, Apr. 2007 > - Ph?nix, No. 164, Jul. 2007 > - Ph?nix, No. 168, Dec. 2007 > > What is still missing on the Retro Corner?> > Thema Danicum 124ff> diagrammes 127-137,139ff> Europe Echecs 422, 466, 469> Phenix Apr.2006, Apr.2008ff> Probleemblad Jan.2005-Jul.2006, Jul.2008ff> The Problemist Jan.1999-Jan.2000, May.2000, Sep.2000-Mar.2002> Jul.2002-Sep-2002, Jan.2004-Mar.2003, Sep.2003-Nov.2003> May.2004-Sep.2006, Jan.2008, Sep.2008ff> Die Schwalbe 1-147, 233ff> StrateGems 5, 44ff> Thema Danicum 1-80, 124ff> > ~?tt?~> > _______________________________________________> Retros mailing list> Retros at janko.at> http://www.pairlist.net/mailman/listinfo/retros _________________________________________________________________ T?l?phonez gratuitement ? tous vos proches avec Windows Live Messenger? !? T?l?chargez-le maintenant ! http://www.windowslive.fr/messenger/1.asp -------------- next part -------------- An HTML attachment was scrubbed... URL: From Eric.Angelini at kntv.be Thu Sep 18 07:53:24 2008 From: Eric.Angelini at kntv.be (Eric Angelini) Date: Thu, 18 Sep 2008 13:53:24 +0200 Subject: [Retros] Another update of the Retro Corner Message-ID: Pascal : > I don't have N?469. At that time, I bought Europe Echecs only when it contained retro problems. As this is the moment where Andr? Hazebrouck stopped the column in Europe Echecs, and just some month before the column completely disappeared, I think that issue 469 didn't contain any originals. ... I confirm -- I have the number 469 under my eyes and there is no "originals page" -- only a... crossword p.67 ! Best, ?. -----Message d'origine----- De : retros-bounces at janko.at [mailto:retros-bounces at janko.at] De la part de Pascal Wassong Envoy? : lundi 15 septembre 2008 22:03 ? : The Retrograde Analysis Mailing List Objet : Re: [Retros] Another update of the Retro Corner Hello, I checked in my collection of Europe Echecs the 3 numbers that are missing: 422 contains the judgment by Wolfgang Dittmann for 1991 - 1992. It contains no originals. 466 contains an article by Michel Caillaud, about Andr? Hazebrouck. It contains no originals. I don't have N?469. At that time, I bought Europe Echecs only when it contained retro problems. As this is the moment where Andr? Hazebrouck stopped the column in Europe Echecs, and just some month before the column completely disappeared, I think that issu 469 didn't contain any originals. The last number I have is 471, which is the last number containing originals. Pascal >>>>> "Otto" == Otto Janko writes: Otto> Another update of the Retro Corner: - Orbit, No. 37 & Otto> No. 38, 2008 - Ph?nix, No. 157, Dec. 2006 - Ph?nix, No. 161, Otto> Apr. 2007 - Ph?nix, No. 164, Jul. 2007 - Ph?nix, No. 168, Otto> Dec. 2007 Otto> What is still missing on the Retro Corner? Otto> Thema Danicum 124ff diagrammes 127-137,139ff Europe Echecs Otto> 422, 466, 469 Phenix Apr.2006, Apr.2008ff Probleemblad Otto> Jan.2005-Jul.2006, Jul.2008ff The Problemist Otto> Jan.1999-Jan.2000, May.2000, Sep.2000-Mar.2002 Otto> Jul.2002-Sep-2002, Jan.2004-Mar.2003, Sep.2003-Nov.2003 Otto> May.2004-Sep.2006, Jan.2008, Sep.2008ff Die Schwalbe 1-147, Otto> 233ff StrateGems 5, 44ff Thema Danicum 1-80, 124ff Otto> ~?tt?~ Otto> _______________________________________________ Retros Otto> mailing list Retros at janko.at Otto> http://www.pairlist.net/mailman/listinfo/retros _______________________________________________ Retros mailing list Retros at janko.at http://www.pairlist.net/mailman/listinfo/retros From Eric.Angelini at kntv.be Thu Sep 18 08:02:21 2008 From: Eric.Angelini at kntv.be (Eric Angelini) Date: Thu, 18 Sep 2008 14:02:21 +0200 Subject: [Retros] Another update of the Retro Corner (2) Message-ID: ... the only retro-content of EE 469 is a 3-page paper about ? Messigny -- Championnat de France de solutions d'analyses r?trogrades ?... starting with an "in?dit" from Pascal Wassong --> [Colorier les pi?ces (7+0)], followed by another "in?dit" from J. Beasley --> [Proof Game in 8.0 moves]. At the end of the paper there is a first prize pb from P. Leroy -- > [Mesigny 1998, "Plus courte partie justi- ficative en 15.0 coups (12+15)"] Best, ?. -----Message d'origine----- De : Eric Angelini Envoy? : jeudi 18 septembre 2008 13:53 ? : 'The Retrograde Analysis Mailing List' Objet : RE: [Retros] Another update of the Retro Corner Pascal : > I don't have N?469. At that time, I bought Europe Echecs only when it contained retro problems. As this is the moment where Andr? Hazebrouck stopped the column in Europe Echecs, and just some month before the column completely disappeared, I think that issue 469 didn't contain any originals. ... I confirm -- I have the number 469 under my eyes and there is no "originals page" -- only a... crossword p.67 ! Best, ?. -----Message d'origine----- De : retros-bounces at janko.at [mailto:retros-bounces at janko.at] De la part de Pascal Wassong Envoy? : lundi 15 septembre 2008 22:03 ? : The Retrograde Analysis Mailing List Objet : Re: [Retros] Another update of the Retro Corner Hello, I checked in my collection of Europe Echecs the 3 numbers that are missing: 422 contains the judgment by Wolfgang Dittmann for 1991 - 1992. It contains no originals. 466 contains an article by Michel Caillaud, about Andr? Hazebrouck. It contains no originals. I don't have N?469. At that time, I bought Europe Echecs only when it contained retro problems. As this is the moment where Andr? Hazebrouck stopped the column in Europe Echecs, and just some month before the column completely disappeared, I think that issu 469 didn't contain any originals. The last number I have is 471, which is the last number containing originals. Pascal >>>>> "Otto" == Otto Janko writes: Otto> Another update of the Retro Corner: - Orbit, No. 37 & Otto> No. 38, 2008 - Ph?nix, No. 157, Dec. 2006 - Ph?nix, No. 161, Otto> Apr. 2007 - Ph?nix, No. 164, Jul. 2007 - Ph?nix, No. 168, Otto> Dec. 2007 Otto> What is still missing on the Retro Corner? Otto> Thema Danicum 124ff diagrammes 127-137,139ff Europe Echecs Otto> 422, 466, 469 Phenix Apr.2006, Apr.2008ff Probleemblad Otto> Jan.2005-Jul.2006, Jul.2008ff The Problemist Otto> Jan.1999-Jan.2000, May.2000, Sep.2000-Mar.2002 Otto> Jul.2002-Sep-2002, Jan.2004-Mar.2003, Sep.2003-Nov.2003 Otto> May.2004-Sep.2006, Jan.2008, Sep.2008ff Die Schwalbe 1-147, Otto> 233ff StrateGems 5, 44ff Thema Danicum 1-80, 124ff Otto> ~?tt?~ Otto> _______________________________________________ Retros Otto> mailing list Retros at janko.at Otto> http://www.pairlist.net/mailman/listinfo/retros _______________________________________________ Retros mailing list Retros at janko.at http://www.pairlist.net/mailman/listinfo/retros From liskov at im.bas-net.by Fri Sep 19 05:30:21 2008 From: liskov at im.bas-net.by (Valery Liskovets) Date: Fri, 19 Sep 2008 12:30:21 +0300 Subject: [Retros] PRA & RS: Jurmala-2008 vs Piran-1958 References: <000001c91512$fa0c1420$4a00a8c0@ww300.siemens.net> <48CE3F28.8A2F46D8@im.bas-net.by> <20080915133635.N71069@router.joost.localnet> Message-ID: <48D3712D.A729CF89@im.bas-net.by> Joost de Heer wrote: > Has anyone made a comparison between the previous article and the current > one? For comparison, we should now, apparently, stipulate not applying the PRA-convention (Art.16.3) to ordinary helpmate problems like the following: P.R. Orlik, 1978 [P0534191] W: Ke1 Ra1 Rh1; B: Kg2 Rc2 Rg3 Sd4 Se4 (3+5) h#2 b) bKb3 a) 1.Rf2 0-0-0 2.Rgf3 Rdg1#; b) 1.Rgc3 0-0 2. Kb2 Rfb1#. Valery L. From raosorio at fibertel.com.ar Fri Sep 19 06:54:49 2008 From: raosorio at fibertel.com.ar (raosorio at fibertel.com.ar) Date: Fri, 19 Sep 2008 07:54:49 -0300 Subject: [Retros] PRA & RS: Jurmala-2008 vs Piran-1958 Message-ID: <7c69272814c7.48d35ac9@fibertel.com.ar> Hi friends, I see the following points: 1) From the very beggining, we should note that the Code in art 2 establishes "A chess composition consists usually of a POSITION on the chess board". So, it does not refer to a DIAGRAM (which is just a distribution of pieces on the board) but to a POSITION. the Code does not define what is it, but it is well establish that a position is diagram+ rights. If we start from here, then there are two completely different situations: a) A helpmate position where both O-O and O-O-O are posible but mutually exclusive and there are two potential solutions based one to one on each of them. Since the problem starts from a "position" , the first solution the solver shows determines the choice of the used castling right and the other one is not posible starting from the same "position" (unless RVs were mentioned). b) A twinned problem like P.R. Orlik, 1978 [P0534191]. Twins start by nature from different positions since the distribution of pieces on the board are not the same, so they result from different proofgames. Therefore, the a) and b) solutions in this type of problems have no special considerations. 2) In any problem, the initial position and all the intermidiate ones during the solution sequence have to be legal. So, why is the "RS convention" necessary? Isn't it obvious that, if black and white castling rights are mutually exclusive, then any side is abble to do it but after one of them doing it the other has no more the right (since it would be illegal)? Best, Roberto ----- Mensaje original ----- De: Valery Liskovets Fecha: Viernes, Septiembre 19, 2008 6:30 am Asunto: Re: [Retros] PRA & RS: Jurmala-2008 vs Piran-1958 > Joost de Heer wrote: > > > Has anyone made a comparison between the previous article and > the current > > one? > > For comparison, we should now, apparently, stipulate not applying > the PRA-convention (Art.16.3) to ordinary helpmate problems > like the following: P.R. Orlik, 1978 [P0534191] > W: Ke1 Ra1 Rh1; B: Kg2 Rc2 Rg3 Sd4 Se4 (3+5) h#2 b) bKb3 > a) 1.Rf2 0-0-0 2.Rgf3 Rdg1#; b) 1.Rgc3 0-0 2. Kb2 Rfb1#. > > Valery L. > > From mvalg at velucchi.it Sat Sep 20 05:26:04 2008 From: mvalg at velucchi.it (MValg. - H&Sc.) Date: Sat, 20 Sep 2008 11:26:04 +0200 Subject: [Retros] ktsolver - Just a Knight's Tour problem solver Message-ID: ktsolver - Just a Knight's Tour problem solver http://ktsolver.sourceforge.net/ best .marioV -- Mario Velucchi via Emlia, 106 I-56121 Pisa - ITALY mvalg at velucchi.it - http://www.velucchi.it tel +39.3487366652 / +39.050502400 fax +39.06233238786 / +39.05061431159 ---------------------------------------------------------------------------- ---------------------------- Software Analyst and Developer / Computer Mathematician Combinatorics / Number Theory Algorithms field of research Coder - Database Coder - Web Coder / Windows and Linux Environment Maths & Chess columnist and author ---------------------------------------------------------------------------- ---------------------------- http://www.velucchi.it/enjoyments/ http://eBrain.go.to -------------- next part -------------- An HTML attachment was scrubbed... URL: From mvalg at velucchi.it Sun Sep 21 16:52:25 2008 From: mvalg at velucchi.it (MValg. - H&Sc.) Date: Sun, 21 Sep 2008 22:52:25 +0200 Subject: [Retros] Checkers Is Solved - Science 14 September 2007 Message-ID: Checkers Is Solved Science 14 September 2007: Vol. 317. no. 5844, pp. 1518 - 1522 http://www.sciencemag.org/cgi/content/abstract/1144079?ijkey=jVmVcXy2/NTnY&k eytype=ref&siteid=sci best .marioV -- Mario Velucchi via Emlia, 106 I-56121 Pisa - ITALY mvalg at velucchi.it - http://www.velucchi.it tel +39.3487366652 / +39.050502400 fax +39.06233238786 / +39.05061431159 ---------------------------------------------------------------------------- --------------------- Software Analyst and Developer / Computer Mathematician Combinatorics / Number Theory Algorithms field of research Coder - Database Coder - Web Coder / Windows and Linux Environment Maths & Chess columnist and author / Problem Solver ---------------------------------------------------------------------------- --------------------- http://www.velucchi.it/enjoyments http://www.velucchi.it/eBrain -------------- next part -------------- An HTML attachment was scrubbed... URL: From mvalg at velucchi.it Thu Sep 25 05:47:48 2008 From: mvalg at velucchi.it (MValg. - H&Sc.) Date: Thu, 25 Sep 2008 11:47:48 +0200 Subject: [Retros] 1st problemistic meeting in Milano 6, 7 e 8 dicembre - chess problems Message-ID: Thanks to the availability of the Company Scacchistica Milanese we can organize a rally problemistic in December 2008 at the St. Ambrose bridge (or bridge dell'Immacolata outside Milan ;-)). 6/7/8 December 2008 1st problemistic meeting of Sant'Ambrogio All composers, Solver, fans of problems and studies, Italy and the world are invited to participate in the 1st problemistic meeting of Sant'Ambrogio at the Milanese Scacchistica from Saturday 6 to Monday 8 December 2008 in conjunction with the 29th international tournament Crespi. On December 7 will be held, as tradition now, the Italian Championship solution fast. The remainder of the program is free, and it is an opportunity to find among fans of chess composition. It provides for a presentation of the world of problem players, mini conferences argument problemistic, tournaments and other composition that will be defined later. You can not miss! We expect December 6 in Milan! Here is a map with Google's SSM headquarters, hotels and subway stops http://tinyurl.com/5em45v The two closest hotels http://www.nh-hotels.com/nh/en/hotels/italy/milan/nh-concordia.html http://www.hotelstjohn.it/ Given the proximity to the line 1 (red) metro, is of course possible to find a hotel in other areas. Announcement and details are now on site for http://www.eteroscacco.it/esp/santambrogio_ita.html For information, details, hotels and so on. Mail to: Marco Bonavoglia marco.bonavoglia AT poste.it Stefano Galletti stegal67 AT hotmail.com best .marioV -- Mario Velucchi via Emlia, 106 I-56121 Pisa ? ITALY mvalg at velucchi.it - http://www.velucchi.it tel +39.3487366652 / +39.050502400 fax +39.06233238786 / +39.05061431159 -------------------------------------------------------------------------------- ------------------------------------------------------ Software Analyst and Developer / Computer Mathematician Combinatorics / Number Theory / Cryptography / Theory of Algorithms Coder - Database Coder - Web Coder / Windows and Linux Environment Maths & Chess Columnist and Author / Problem Solver / Detective of Mysterious or Inexplicable Facts -------------------------------------------------------------------------------- ------------------------------------------------------ http://www.velucchi.it/enjoyments http://www.velucchi.it/eBrain -----Messaggio originale----- Da: Marco Bonavoglia [ mailto:marco.bonavoglia at poste.it] Inviato: marted? 23 settembre 2008 16.26 A: Itaprob (E-mail) Oggetto: [itaprob] Raduno a Milano 6,7 e 8 dicembre Grazie alla disponibilit? della Societ? Scacchistica Milanese siamo in grado di organizzare un raduno problemistico a dicembre 2008 in occasione del ponte di Sant'Ambrogio (o ponte dell'Immacolata fuori Milano ;-) ). 6/7/8 dicembre 2008 1? incontro problemistico di Sant'Ambrogio Tutti i compositori, solutori, appassionati di problemi e di studi, dall'Italia e dal mondo, sono invitati a partecipare al 1? incontro problemistico di Sant'Ambrogio presso la Scacchistica Milanese da sabato 6 a luned? 8 dicembre 2008 in concomitanza col 29? torneo internazionale Crespi. Il 7 dicembre si terr?, come ormai tradizione, il Campionato Italiano di soluzione veloce. Per il resto il programma ? libero, ed ? un'occasione di ritrovarsi fra appassionati della composizione scacchistica. Sono previste una presentazione del mondo del problema ai giocatori, mini conferenze di argomento problemistico, tornei di composizione e altro che verr? definito in seguito. Non potete mancare! Vi aspettiamo il 6 dicembre a Milano! Qui una mappa Google con la sede della SSM, alberghi e fermate del metr? http://tinyurl.com/5em45v I due alberghi pi? vicino http://www.nh-hotels.com/nh/en/hotels/italy/milan/nh-concordia.html http://www.hotelstjohn.it/ Data la vicinanza con la linea 1 (rossa) del metr?, ? ovviamente possibile trovare un albergo in altre zone. Bando e dettagli sono presenti per ora sul sito http://www.eteroscacco.it/esp/santambrogio_ita.html Per ogni informazione, dettagli, alberghi ecc. scrivere a: Marco Bonavoglia marco.bonavoglia AT poste.it Stefano Galletti stegal67 AT hotmail.com -------------- next part -------------- An HTML attachment was scrubbed... URL: From joost at sanguis.xs4all.nl Tue Sep 30 11:16:54 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Tue, 30 Sep 2008 17:16:54 +0200 Subject: [Retros] The Problemist September 2008 Message-ID: <48E242E6.1090109@sanguis.xs4all.nl> R397v - Dragan Stojnic 4k2r/2p1ppsb/1p2p2Q/bP2S1S1/2P2pp1/2P2P2/2PR1PP1/R3K3 (13+12) +---+---+---+---+---+---+---+---+ | | . | | . |*K | . | |*R | +---+---+---+---+---+---+---+---+ | . | |*P | |*P |*P |*S |*B | +---+---+---+---+---+---+---+---+ | |*P | | . |*P | . | | Q | +---+---+---+---+---+---+---+---+ |*B | P | . | | S | | S | | +---+---+---+---+---+---+---+---+ | | . | P | . | |*P |*P | . | +---+---+---+---+---+---+---+---+ | . | | P | | . | P | . | | +---+---+---+---+---+---+---+---+ | | . | P | R | | P | P | . | +---+---+---+---+---+---+---+---+ | R | | . | | K | | . | | +---+---+---+---+---+---+---+---+ #2 R401 - Mark Thornton Dedicated to the memory of Tony Miles 3qkbs1/1ppppp2/2s4p/1p5p/4P3/2P5/1P1P1PPP/2Q1K1SR (11+13) +---+---+---+---+---+---+---+---+ | | . | |*Q |*K |*B |*S | . | +---+---+---+---+---+---+---+---+ | . |*P |*P |*P |*P |*P | . | | +---+---+---+---+---+---+---+---+ | | . |*S | . | | . | |*P | +---+---+---+---+---+---+---+---+ | . |*P | . | | . | | . |*P | +---+---+---+---+---+---+---+---+ | | . | | . | P | . | | . | +---+---+---+---+---+---+---+---+ | . | | P | | . | | . | | +---+---+---+---+---+---+---+---+ | | P | | P | | P | P | P | +---+---+---+---+---+---+---+---+ | . | | Q | | K | | S | R | +---+---+---+---+---+---+---+---+ PG 11.0 R402 - Nicolas Dupont Dedicated to Andrei Frolkin & Dmitri Pronkin 1s2b2q/1p1s1p2/1prp1k1b/5pr1/8/3p1p2/1P1P1Pp1/RSBQKBSR (11+16) +---+---+---+---+---+---+---+---+ | |*S | | . |*B | . | |*Q | +---+---+---+---+---+---+---+---+ | . |*P | . |*S | . |*P | . | | +---+---+---+---+---+---+---+---+ | |*P |*R |*P | |*K | |*B | +---+---+---+---+---+---+---+---+ | . | | . | | . |*P |*R | | +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | +---+---+---+---+---+---+---+---+ | . | | . |*P | . |*P | . | | +---+---+---+---+---+---+---+---+ | | P | | P | | P |*P | . | +---+---+---+---+---+---+---+---+ | R | S | B | Q | K | B | S | R | +---+---+---+---+---+---+---+---+ PG 27.5 F2667 - Charles Frankiss r1b1qbs1/pp1spppR/2b4P/8/8/3p1S2/PPPPPPP1/RSBQKB1k (16+14) +---+---+---+---+---+---+---+---+ |*R | . |*B | . |*Q |*B |*S | . | +---+---+---+---+---+---+---+---+ |*P |*P | . |*S |*P |*P |*P | R | +---+---+---+---+---+---+---+---+ | | . |*B | . | | . | | P | +---+---+---+---+---+---+---+---+ | . | | . | | . | | . | | +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | +---+---+---+---+---+---+---+---+ | . | | . |*P | . | S | . | | +---+---+---+---+---+---+---+---+ | P | P | P | P | P | P | P | . | +---+---+---+---+---+---+---+---+ | R | S | B | Q | K | B | . |*K | +---+---+---+---+---+---+---+---+ PG 10.0 (Annan chess) PS2108F - Guy Sobrecases rsbqkb1r/pppppspp/8/6B1/3P1P2/2SB1S2/PPP1P2P/2RQ2RK (15+15) +---+---+---+---+---+---+---+---+ |*R |*S |*B |*Q |*K |*B | |*R | +---+---+---+---+---+---+---+---+ |*P |*P |*P |*P |*P |*S |*P |*P | +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | +---+---+---+---+---+---+---+---+ | . | | . | | . | | B | | +---+---+---+---+---+---+---+---+ | | . | | P | | P | | . | +---+---+---+---+---+---+---+---+ | . | | S | B | . | S | . | | +---+---+---+---+---+---+---+---+ | P | P | P | . | P | . | | P | +---+---+---+---+---+---+---+---+ | . | | R | Q | . | | R | K | +---+---+---+---+---+---+---+---+ PG 11.5 Annan chess: If a unit (including king) is directly in front of another unit of its own side (one rank higher for white, lower for black) it does not move with its usual power but instead of the (original!) power of the unit behind it. From joost at sanguis.xs4all.nl Tue Sep 30 11:26:27 2008 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Tue, 30 Sep 2008 17:26:27 +0200 Subject: [Retros] The Problemist, september 2008 (part 2) Message-ID: <48E24523.9050502@sanguis.xs4all.nl> I missed one: PS2104F - Zolt?n Laborczi, G?bor Tar 8/1p2p3/B4b2/p7/kPpp4/p1p5/7r/R3K3 (4+10) +---+---+---+---+---+---+---+---+ | | . | | . | | . | | . | +---+---+---+---+---+---+---+---+ | . |*P | . | |*P | | . | | +---+---+---+---+---+---+---+---+ | B | . | | . | |*B | | . | +---+---+---+---+---+---+---+---+ |*P | | . | | . | | . | | +---+---+---+---+---+---+---+---+ |*K | P |*P |*P | | . | | . | +---+---+---+---+---+---+---+---+ |*P | |*P | | . | | . | | +---+---+---+---+---+---+---+---+ | | . | | . | | . | |*R | +---+---+---+---+---+---+---+---+ | R | | . | | K | | . | | +---+---+---+---+---+---+---+---+ h#2 2.1;1.1 (AP) From Nicolas.Dupont at math.univ-lille1.fr Tue Sep 30 11:54:17 2008 From: Nicolas.Dupont at math.univ-lille1.fr (Nicolas.Dupont at math.univ-lille1.fr) Date: Tue, 30 Sep 2008 17:54:17 +0200 (CEST) Subject: [Retros] The Problemist September 2008 In-Reply-To: <48E242E6.1090109@sanguis.xs4all.nl> References: <48E242E6.1090109@sanguis.xs4all.nl> Message-ID: <1648.195.146.241.203.1222790057.squirrel@mathwebmail.univ-lille1.fr> R402 is cooked... I will try to correct it for the next issue. Nicolas.