From joost at sanguis.xs4all.nl Thu Jan 1 17:09:55 2009 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Thu, 01 Jan 2009 23:09:55 +0100 Subject: [Retros] StrateGems 45 (Jan-Mar 2009) In-Reply-To: <49561CA9.5040606@sanguis.xs4all.nl> References: <49561CA9.5040606@sanguis.xs4all.nl> Message-ID: <495D3F33.2050102@sanguis.xs4all.nl> Joost de Heer schreef: > 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 Typing error. This should be 'add wK, bK, 4wP, 2bP for a (6+5) IC'. From mvalg at velucchi.it Thu Jan 1 19:11:10 2009 From: mvalg at velucchi.it (Mario Velucchi) Date: Fri, 2 Jan 2009 01:11:10 +0100 Subject: [Retros] This month we consider a pair of problems involving chess pieces (no pawns) and polyominoes. Message-ID: <29b3a48a0901011611q5a28c200gef24855607554ba5@mail.gmail.com> *This month we consider a pair of problems involving chess pieces (no pawns) and polyominoes. * http://www.stetson.edu/~efriedma/mathmagic/ -- best .marioV -- Mario Velucchi via Emlia, 106 I-56121 Pisa ? ITALY mvalg at velucchi.it http://www.velucchi.it phone +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/dblog http://www.velucchi.it/enjoyments http://www.velucchi.it/eBrain -------------- next part -------------- An HTML attachment was scrubbed... URL: From otto at janko.at Fri Jan 2 04:20:48 2009 From: otto at janko.at (Otto Janko) Date: Fri, 2 Jan 2009 10:20:48 +0100 Subject: [Retros] New Year's Update of the Retro Corner Message-ID: Dear Retro Friend, I'm pleased to inform you about the New Year's update of the Retro Corner: A) Recent Retro Problems: Die Schwalbe, No. 233, October 2008 Die Schwalbe, No. 234, December 2008 Probleemblad, Jul-Sep 2008 StrateGems, No. 44, Oct-Dec 2008 The Problemist, September 2008 The Problemist, November 2008 StrateGems, No. 45, Jan-Mar 2009 B) Older Retro Problems: Probleemblad, Jan-Feb 2005 (incl. solutions) Probleemblad, Mar-Apr 2005 (incl. solutions) Probleemblad, May-Jun 2005 (incl. solutions) Probleemblad, Jul-Aug 2005 (incl. solutions) Probleemblad, Sep-Oct 2005 (incl. solutions) Probleemblad, Nov-Dec 2005 (incl. solutions) Probleemblad, Jan-Feb 2006 Probleemblad, Mar-Apr 2006 Probleemblad, May-Jun 2006 Probleemblad, Jul-Aug 2006 The Problemist, May 2004 The Problemist, July 2004 The Problemist, September 2004 The Problemist, November 2004 C) Solutions added: StrateGems, No. 43, Jul-Sep 2008 Many thanks to Joost who provided almost all promblems (mostly on the Retro Mailing List). 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 andrew at anselan.com Fri Jan 2 04:30:20 2009 From: andrew at anselan.com (andrew at anselan.com) Date: Fri, 2 Jan 2009 09:30:20 +0000 Subject: [Retros] New Year's Update of the Retro Corner Message-ID: <1544618375-1230888592-cardhu_decombobulator_blackberry.rim.net-1033594625-@bxe087.bisx.produk.on.blackberry> Can I take this opportunity to give a big New Year thank you to Otto and Joost for all their work maintaining and extending our site. It is truly appreciated. Cheers Andy ------Original Message------ From: Otto Janko Sender: retros-bounces at janko.at To: Retros ReplyTo: The Retrograde Analysis Mailing List Subject: [Retros] New Year's Update of the Retro Corner Sent: 2 Jan 2009 11:20 AM Dear Retro Friend, I'm pleased to inform you about the New Year's update of the Retro Corner: A) Recent Retro Problems: Die Schwalbe, No. 233, October 2008 Die Schwalbe, No. 234, December 2008 Probleemblad, Jul-Sep 2008 StrateGems, No. 44, Oct-Dec 2008 The Problemist, September 2008 The Problemist, November 2008 StrateGems, No. 45, Jan-Mar 2009 B) Older Retro Problems: Probleemblad, Jan-Feb 2005 (incl. solutions) Probleemblad, Mar-Apr 2005 (incl. solutions) Probleemblad, May-Jun 2005 (incl. solutions) Probleemblad, Jul-Aug 2005 (incl. solutions) Probleemblad, Sep-Oct 2005 (incl. solutions) Probleemblad, Nov-Dec 2005 (incl. solutions) Probleemblad, Jan-Feb 2006 Probleemblad, Mar-Apr 2006 Probleemblad, May-Jun 2006 Probleemblad, Jul-Aug 2006 The Problemist, May 2004 The Problemist, July 2004 The Problemist, September 2004 The Problemist, November 2004 C) Solutions added: StrateGems, No. 43, Jul-Sep 2008 Many thanks to Joost who provided almost all promblems (mostly on the Retro Mailing List). 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 Sent from my BlackBerry? wireless device From joost at sanguis.xs4all.nl Fri Jan 2 09:55:25 2009 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Fri, 02 Jan 2009 15:55:25 +0100 Subject: [Retros] Probleemblad 4-2008 (oct-dec) Message-ID: <495E2ADD.2030209@sanguis.xs4all.nl> R345 - Itamar Faybish r1bqkbnr/2pppppp/P7/8/p7/4P3/1P1P1PPP/2B1K1NR (11+14) Exact proofgame in 8.5 (C+) [Not a shortest proofgame!] R346 - Nicolas Dupont rn2kbn1/1p1pppp1/2R3p1/2pr4/5P2/1P6/1PPPPNP1/1NBQKR2 (14+13) Proofgame in 17.5 (C+) R347 - Silvio Baier rnbqkbnr/1pB1pp1p/1Pp5/1RQ1R3/1K5P/1PP1P3/B1P2P1P/1N4N1 (16+13) Proofgame in 25.0 (C+) R348 - Harry Goldsteen 8/8/p7/PPPp4/krpP4/NNKPPP2/1p2rp1P/BRqqb3 (13+11) Mate? (Is the position legal? If so, what was the last move?) Solutions 2008-2 R336 - Eyjolfsson 1. Nf3 Nc6 2. Ne5 Nd4 3. Nc6 Nxe2 4. Nb8 Ng1 5. Bd3 b6 6. Bxh7 Ba6 7. Be4 Rh6 8. Bb7 Rc6 9. Nc3 e6 10. Nd5 Ba3 11. Ne7 Nf6 12. Ng8 Qe7 13. bxa3 Kd8 14. Bb2 Ne8 15. Bf6 Bf1 16. Bh4 f6 17. Bc8 Qf7 Belfort-theme R337 - Lois, Osorio 1. e4 c5 2. Qf3 Nc6 3. Qf6 gxf6 4. Ke2 Bh6 5. Kf3 Bxd2 6. Be2 Ba5 7. Bf4 Kf8 8. Bb8 Kg7 9. Kf4 Qf8 10. Nf3 Bd8 11. Rd1 b6 12. Rd6 Ba6 13. Nbd2 Bc4 14. Re1 Be6 15. Bd1 Bf5 16. exf5 exd6 17. Re8 Be7 18. Rc8 Qd8 19. Rc7 Bf8 The black queen and bishop exchange places twice. *R338 - Grudzinski, Tippmann Intention: 1. h4 g5 2. hg5 e6 3. Rh7 Ba3 4. Rf7 Bb4[+a3] 5. Rd7 Be7[+b4] 6. Rc7 Qd4 7. Rb7 Qc3[+d4] 8. Ra7 Qg3[+c3] 9. Ra6 Qg5[+g3] 10. Re6[+a6] Qf4[+g5] 11. Rh6 Qe3[+f4] 12. Rh4 Ba6 13. Rh2[+h4] gh4 14. Rh1[+h2] Qe6[+e3] Cooked by Eddy van Beers: 1. e3 e6 2. Qh5 Qh4 3. Qh7 f5 4. Qf5 d5 5. Qd5 Qg3[+h4] 6. Qb7 Qf4[+g3] 7. Qa7 Qb4[+f4] 8. Qc7 Qa3[+b4] 9. Qg7 Qc3[+a3] 10. Qf6 Qd4[+c3] 11. Qe6 Be7 12. Qc4 Ba6 13. Qe2 Qe3[+d4] 14. Qd1[+e2] Qe6[+e3] *R339 - Crisan, Raican a) Retract -1. Ra1*Pa7 Kb5*Rc5[+Ra1,-Sa1] and 1. Ka4 Ra5# b) Retract -1. Qd1*Pd7 Kd4*Qc5[+Qd1,-Bd1] and 1. Kd3 Qd4# a) is cooked: -1. Qa6/Qb8*Pa7 Kd5-c5 and 1. e4 Qd6# R340 - Wenda -1. Kf3xBg2[+Ke1]! Qc8-f8 -2. Rh4-h7 Bf1-g2 -3. g7-g8=B Bg2-f1 -4. g6-g7 Bf1-g2 -5. g5-g6 Bg2-f1 -6. g4-g5 Bf1-g2 -7. g2-g4 and 1. Bxh2[+Bc1]# It might be for the first time that one sees a white retro-Excelsior with underpromotion in a defensive retractor (Author). [And one helpmate with minimal retro content:] H815 - Vladislav Nefyedov 5r2/5p2/2p1pP2/s1p1prp1/4k3/4p1b1/4Ps2/4K2R (4+13) h#3 (2.1;1.1;1.1) From peter.fayers at virgin.net Sun Jan 4 06:55:30 2009 From: peter.fayers at virgin.net (peter.fayers at virgin.net) Date: Sun, 4 Jan 2009 11:55:30 +0000 (GMT) Subject: [Retros] New Year's update to Retro Corner Message-ID: <1199089612.144811.1231070130700.JavaMail.mail@webmail06> An HTML attachment was scrubbed... URL: From joost at sanguis.xs4all.nl Sun Jan 4 07:06:12 2009 From: joost at sanguis.xs4all.nl (Joost de Heer) Date: Sun, 04 Jan 2009 13:06:12 +0100 Subject: [Retros] Solutions on the retro-corner Message-ID: <4960A634.9000401@sanguis.xs4all.nl> As you may have noticed, there are a lot of solutions missing on the retro corner. I'm currently working through the pile of magazines I have and sending the solutions to Otto for inclusion on the website to remedy this lack. Probleemblad is now nearly finished, and Die Schwalbe is next on the planning. For the future updates on the mailinglist, I will also send the solutions printed in that magazine (as I've done now for the latest Probleemblad and Strategems originals). Joost From otto at janko.at Sun Jan 4 07:16:08 2009 From: otto at janko.at (Otto Janko) Date: Sun, 4 Jan 2009 13:16:08 +0100 Subject: [Retros] New Year's update to Retro Corner In-Reply-To: <1199089612.144811.1231070130700.JavaMail.mail@webmail06> References: <1199089612.144811.1231070130700.JavaMail.mail@webmail06> Message-ID: <4408F7C99076486DAF2A1966967544F2@ww300.siemens.net> Yes, I will provide a zip file as every year. I will do this after the new year's updates are completed (Joost is sending me constantly more input). ~?tt?~ _____ From: retros-bounces at janko.at [mailto:retros-bounces at janko.at] On Behalf Of peter.fayers at virgin.net Sent: Sunday, January 04, 2009 12:56 PM To: retros at janko.at Subject: [Retros] New Year's update to Retro Corner I echo the thank for all your hard work in 2008. Are we once again going to be able to download the entire site on a zip file? I find this very useful for doing research into problems on my laptop when I am unable to get online for any reason. Many thanks, Peter. Jan 2, 2009 12:15:47 PM, retros at janko.at wrote: Send Retros mailing list submissions to retros at janko.at To subscribe or unsubscribe via the World Wide Web, visit http://www.pairlist.net/mailman/listinfo/retros or, via email, send a message with subject or body 'help' to retros-request at janko.at You can reach the person managing the list at retros-owner at janko.at When replying, please edit your Subject line so it is more specific than "Re: Contents of Retros digest..." Today's Topics: 1. Re: StrateGems 45 (Jan-Mar 2009) (Joost de Heer) 2. This month we consider a pair of problems involving chess pieces (no pawns) and polyominoes. (Mario Velucchi) 3. New Year's Update of the Retro Corner (Otto Janko) 4. Re: New Year's Update of the Retro Corner (andrew at anselan.com) 5. Probleemblad 4-2008 (oct-dec) (Joost de Heer) ---------------------------------------------------------------------- Message: 1 Date: Thu, 01 Jan 2009 23:09:55 +0100 From: Joost de Heer Subject: Re: [Retros] StrateGems 45 (Jan-Mar 2009) To: The Retrograde Analysis Mailing List Message-ID: <495D3F33.2050102 at sanguis.xs4all.nl> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Joost de Heer schreef: > 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 Typing error. This should be 'add wK, bK, 4wP, 2bP for a (6+5) IC'. ------------------------------ Message: 2 Date: Fri, 2 Jan 2009 01:11:10 +0100 From: "Mario Velucchi" Subject: [Retros] This month we consider a pair of problems involving chess pieces (no pawns) and polyominoes. To: retros at janko.at, itaprob at velucchi.it Message-ID: <29b3a48a0901011611q5a28c200gef24855607554ba5 at mail.gmail.com> Content-Type: text/plain; charset="windows-1252" *This month we consider a pair of problems involving chess pieces (no pawns) and polyominoes. * http://www.stetson.edu/~efriedma/mathmagic/ -- best .marioV -- Mario Velucchi via Emlia, 106 I-56121 Pisa ? ITALY mvalg at velucchi.it http://www.velucchi.it phone +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/dblog http://www.velucchi.it/enjoyments http://www.velucchi.it/eBrain -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 3 Date: Fri, 2 Jan 2009 10:20:48 +0100 From: "Otto Janko" Subject: [Retros] New Year's Update of the Retro Corner To: "Retros" Message-ID: Content-Type: text/plain; charset="us-ascii" Dear Retro Friend, I'm pleased to inform you about the New Year's update of the Retro Corner: A) Recent Retro Problems: Die Schwalbe, No. 233, October 2008 Die Schwalbe, No. 234, December 2008 Probleemblad, Jul-Sep 2008 StrateGems, No. 44, Oct-Dec 2008 The Problemist, September 2008 The Problemist, November 2008 StrateGems, No. 45, Jan-Mar 2009 B) Older Retro Problems: Probleemblad, Jan-Feb 2005 (incl. solutions) Probleemblad, Mar-Apr 2005 (incl. solutions) Probleemblad, May-Jun 2005 (incl. solutions) Probleemblad, Jul-Aug 2005 (incl. solutions) Probleemblad, Sep-Oct 2005 (incl. solutions) Probleemblad, Nov-Dec 2005 (incl. solutions) Probleemblad, Jan-Feb 2006 Probleemblad, Mar-Apr 2006 Probleemblad, May-Jun 2006 Probleemblad, Jul-Aug 2006 The Problemist, May 2004 The Problemist, July 2004 The Problemist, September 2004 The Problemist, November 2004 C) Solutions added: StrateGems, No. 43, Jul-Sep 2008 Many thanks to Joost who provided almost all promblems (mostly on the Retro Mailing List). 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] ------------------------------ Message: 4 Date: Fri, 2 Jan 2009 09:30:20 +0000 From: andrew at anselan.com Subject: Re: [Retros] New Year's Update of the Retro Corner To: "The Retrograde Analysis Mailing List" Message-ID: <1544618375-1230888592-cardhu_decombobulator_blackberry.rim.net-1033594625-@ bxe087.bisx.produk.on.blackberry> Content-Type: text/plain; charset="Windows-1252" Can I take this opportunity to give a big New Year thank you to Otto and Joost for all their work maintaining and extending our site. It is truly appreciated. Cheers Andy ------Original Message------ From: Otto Janko Sender: retros-bounces at janko.at To: Retros ReplyTo: The Retrograde Analysis Mailing List Subject: [Retros] New Year's Update of the Retro Corner Sent: 2 Jan 2009 11:20 AM Dear Retro Friend, I'm pleased to inform you about the New Year's update of the Retro Corner: A) Recent Retro Problems: Die Schwalbe, No. 233, October 2008 Die Schwalbe, No. 234, December 2008 Probleemblad, Jul-Sep 2008 StrateGems, No. 44, Oct-Dec 2008 The Problemist, September 2008 The Problemist, November 2008 StrateGems, No. 45, Jan-Mar 2009 B) Older Retro Problems: Probleemblad, Jan-Feb 2005 (incl. solutions) Probleemblad, Mar-Apr 2005 (incl. solutions) Probleemblad, May-Jun 2005 (incl. solutions) Probleemblad, Jul-Aug 2005 (incl. solutions) Probleemblad, Sep-Oct 2005 (incl. solutions) Probleemblad, Nov-Dec 2005 (incl. solutions) Probleemblad, Jan-Feb 2006 Probleemblad, Mar-Apr 2006 Probleemblad, May-Jun 2006 Probleemblad, Jul-Aug 2006 The Problemist, May 2004 The Problemist, July 2004 The Problemist, September 2004 The Problemist, November 2004 C) Solutions added: StrateGems, No. 43, Jul-Sep 2008 Many thanks to Joost who provided almost all promblems (mostly on the Retro Mailing List). 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 Sent from my BlackBerry? wireless device ------------------------------ Message: 5 Date: Fri, 02 Jan 2009 15:55:25 +0100 From: Joost de Heer Subject: [Retros] Probleemblad 4-2008 (oct-dec) To: The Retrograde Analysis Mailing List Message-ID: <495E2ADD.2030209 at sanguis.xs4all.nl> Content-Type: text/plain; charset=ISO-8859-1; format=flowed R345 - Itamar Faybish r1bqkbnr/2pppppp/P7/8/p7/4P3/1P1P1PPP/2B1K1NR (11+14) Exact proofgame in 8.5 (C+) [Not a shortest proofgame!] R346 - Nicolas Dupont rn2kbn1/1p1pppp1/2R3p1/2pr4/5P2/1P6/1PPPPNP1/1NBQKR2 (14+13) Proofgame in 17.5 (C+) R347 - Silvio Baier rnbqkbnr/1pB1pp1p/1Pp5/1RQ1R3/1K5P/1PP1P3/B1P2P1P/1N4N1 (16+13) Proofgame in 25.0 (C+) R348 - Harry Goldsteen 8/8/p7/PPPp4/krpP4/NNKPPP2/1p2rp1P/BRqqb3 (13+11) Mate? (Is the position legal? If so, what was the last move?) Solutions 2008-2 R336 - Eyjolfsson 1. Nf3 Nc6 2. Ne5 Nd4 3. Nc6 Nxe2 4. Nb8 Ng1 5. Bd3 b6 6. Bxh7 Ba6 7. Be4 Rh6 8. Bb7 Rc6 9. Nc3 e6 10. Nd5 Ba3 11. Ne7 Nf6 12. Ng8 Qe7 13. bxa3 Kd8 14. Bb2 Ne8 15. Bf6 Bf1 16. Bh4 f6 17. Bc8 Qf7 Belfort-theme R337 - Lois, Osorio 1. e4 c5 2. Qf3 Nc6 3. Qf6 gxf6 4. Ke2 Bh6 5. Kf3 Bxd2 6. Be2 Ba5 7. Bf4 Kf8 8. Bb8 Kg7 9. Kf4 Qf8 10. Nf3 Bd8 11. Rd1 b6 12. Rd6 Ba6 13. Nbd2 Bc4 14. Re1 Be6 15. Bd1 Bf5 16. exf5 exd6 17. Re8 Be7 18. Rc8 Qd8 19. Rc7 Bf8 The black queen and bishop exchange places twice. *R338 - Grudzinski, Tippmann Intention: 1. h4 g5 2. hg5 e6 3. Rh7 Ba3 4. Rf7 Bb4[+a3] 5. Rd7 Be7[+b4] 6. Rc7 Qd4 7. Rb7 Qc3[+d4] 8. Ra7 Qg3[+c3] 9. Ra6 Qg5[+g3] 10. Re6[+a6] Qf4[+g5] 11. Rh6 Qe3[+f4] 12. Rh4 Ba6 13. Rh2[+h4] gh4 14. Rh1[+h2] Qe6[+e3] Cooked by Eddy van Beers: 1. e3 e6 2. Qh5 Qh4 3. Qh7 f5 4. Qf5 d5 5. Qd5 Qg3[+h4] 6. Qb7 Qf4[+g3] 7. Qa7 Qb4[+f4] 8. Qc7 Qa3[+b4] 9. Qg7 Qc3[+a3] 10. Qf6 Qd4[+c3] 11. Qe6 Be7 12. Qc4 Ba6 13. Qe2 Qe3[+d4] 14. Qd1[+e2] Qe6[+e3] *R339 - Crisan, Raican a) Retract -1. Ra1*Pa7 Kb5*Rc5[+Ra1,-Sa1] and 1. Ka4 Ra5# b) Retract -1. Qd1*Pd7 Kd4*Qc5[+Qd1,-Bd1] and 1. Kd3 Qd4# a) is cooked: -1. Qa6/Qb8*Pa7 Kd5-c5 and 1. e4 Qd6# R340 - Wenda -1. Kf3xBg2[+Ke1]! Qc8-f8 -2. Rh4-h7 Bf1-g2 -3. g7-g8=B Bg2-f1 -4. g6-g7 Bf1-g2 -5. g5-g6 Bg2-f1 -6. g4-g5 Bf1-g2 -7. g2-g4 and 1. Bxh2[+Bc1]# It might be for the first time that one sees a white retro-Excelsior with underpromotion in a defensive retractor (Author). [And one helpmate with minimal retro content:] H815 - Vladislav Nefyedov 5r2/5p2/2p1pP2/s1p1prp1/4k3/4p1b1/4Ps2/4K2R (4+13) h#3 (2.1;1.1;1.1) ------------------------------ _______________________________________________ Retros mailing list Retros at janko.at http://www.pairlist.net/mailman/listinfo/retros End of Retros Digest, Vol 52, Issue 1 ************************************* -------------- next part -------------- An HTML attachment was scrubbed... URL: From abrobecker at yahoo.com Mon Jan 5 05:27:03 2009 From: abrobecker at yahoo.com (Alain BROBECKER) Date: Mon, 5 Jan 2009 02:27:03 -0800 (PST) Subject: [Retros] Happy new year (was Re:New Year's update to Retro Corner) In-Reply-To: Message-ID: <896671.10594.qm@web56206.mail.re3.yahoo.com> > From: andrew at anselan.com > > Can I take this opportunity to give a big New Year thank > you to Otto and Joost for all their work maintaining and > extending our site. It is truly appreciated. Cheers Andy And may i join you in this opportunity? Thank you Otto and Joost for your work! Happy new year to all retroanalysts. Alain From olli.heimo at luukku.com Mon Jan 5 06:01:41 2009 From: olli.heimo at luukku.com (Olli Heimo) Date: Mon, 5 Jan 2009 13:01:41 +0200 (EET) Subject: [Retros] 2009 problem Message-ID: <1231153301829.olli.heimo.19791.JdZIAOhOFEwg-4ulKCd7Ew@luukku.com> I notice, that Noam Elkies has not sent his usual chess-mathematical problem for year 2009. Is it too difficult to get 2009 solutions in a chess problem. 2009 is really a difficult number, happy composing. Olli. From Eric.Angelini at kntv.be Mon Jan 5 06:01:29 2009 From: Eric.Angelini at kntv.be (Eric Angelini) Date: Mon, 5 Jan 2009 12:01:29 +0100 Subject: [Retros] 2009 problem Message-ID: > 2009 is really a difficult number, = (200*9) +(200+9) (c) Mensanator, rec.puzzles. Best, ?. From retromode at web.de Mon Jan 5 06:15:41 2009 From: retromode at web.de (=?iso-8859-15?Q?Bernd_Gr=E4frath?=) Date: Mon, 05 Jan 2009 12:15:41 +0100 Subject: [Retros] Celebration Message-ID: <1406477937@web.de> Dear retro-enthusiasts, many greeetings and thanks from me, too! By the way: I hope you all had a great celebration yesterday. (The 4th of January has been named the International Day of Chess Composition ? in case you didn't notice... Best wishes, Bernd > -----Urspr?ngliche Nachricht----- > Von: "Alain BROBECKER" > Gesendet: 05.01.09 11:27:34 > An: retros at janko.at > Betreff: [Retros] Happy new year (was Re:New Year's update to Retro Corner) > > From: andrew at anselan.com > > > > Can I take this opportunity to give a big New Year thank > > you to Otto and Joost for all their work maintaining and > > extending our site. It is truly appreciated. Cheers Andy > > And may i join you in this opportunity? > Thank you Otto and Joost for your work! > > Happy new year to all retroanalysts. > > Alain > > > > > _______________________________________________ > Retros mailing list > Retros at janko.at > http://www.pairlist.net/mailman/listinfo/retros > __________________________________________________________________ Deutschlands gr??te Online-Videothek schenkt Ihnen 12.000 Videos!* http://entertainment.web.de/de/entertainment/maxdome/index.html From juha_saukkola at hotmail.com Mon Jan 5 06:47:52 2009 From: juha_saukkola at hotmail.com (Juha Saukkola) Date: Mon, 5 Jan 2009 13:47:52 +0200 Subject: [Retros] 2009 problem In-Reply-To: References: Message-ID: 9*n + 9 + n = 10*n + 9 Not very big coincidence.. > Date: Mon, 5 Jan 2009 12:01:29 +0100 > From: Eric.Angelini at kntv.be > To: retros at janko.at > Subject: Re: [Retros] 2009 problem > > > > 2009 is really a difficult number, > > = (200*9) > +(200+9) > > (c) Mensanator, rec.puzzles. > > Best, > ?. > _______________________________________________ > Retros mailing list > Retros at janko.at > http://www.pairlist.net/mailman/listinfo/retros -------------- next part -------------- An HTML attachment was scrubbed... URL: From Eric.Angelini at kntv.be Mon Jan 5 08:17:52 2009 From: Eric.Angelini at kntv.be (Eric Angelini) Date: Mon, 5 Jan 2009 14:17:52 +0100 Subject: [Retros] 2009 problem Message-ID: > Not very big coincidence.. ... this was not my point -- but the idea to write 2009 with 200's and 9's in _that_ order is interesting. Try this: (200*8) +(200+8) ... and check that this is not 2008 ;-) Best, ?. -----Message d'origine----- De : retros-bounces at janko.at [mailto:retros-bounces at janko.at] De la part de Juha Saukkola Envoy? : lundi 5 janvier 2009 12:48 ? : retros at janko.at Objet : Re: [Retros] 2009 problem 9*n + 9 + n = 10*n + 9 Not very big coincidence.. > Date: Mon, 5 Jan 2009 12:01:29 +0100 > From: Eric.Angelini at kntv.be > To: retros at janko.at > Subject: Re: [Retros] 2009 problem > > > > 2009 is really a difficult number, > > = (200*9) > +(200+9) > > (c) Mensanator, rec.puzzles. > > Best, > ?. > _______________________________________________ > Retros mailing list > Retros at janko.at > http://www.pairlist.net/mailman/listinfo/retros From ageorge at amherst.edu Mon Jan 5 11:14:14 2009 From: ageorge at amherst.edu (Alexander George) Date: Mon, 5 Jan 2009 11:14:14 -0500 Subject: [Retros] On the Jumanji convention In-Reply-To: References: Message-ID: <91E03724-283C-43DC-804A-FDEE3A586688@amherst.edu> For some other thoughts about Article 16 and Werner Keym's discussion of it, you might be interested in my recent post in ChessProblem.net: http://chessproblem.net/viewtopic.php?f=10&t=290 Regards, Alexander George On Dec 30, 2008, at 6:00 AM, Rol, Guus wrote: > > > 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 > _______________________________________________ > Retros mailing list > Retros at janko.at > http://www.pairlist.net/mailman/listinfo/retros From elkies at math.harvard.edu Mon Jan 5 13:47:23 2009 From: elkies at math.harvard.edu (Noam Elkies) Date: Mon, 5 Jan 2009 13:47:23 -0500 (EST) Subject: [Retros] 2009 problem Message-ID: <20090105184723.B6FE7F757@abel.math.harvard.edu> Olli Heimo writes: > I notice, that Noam Elkies has not sent his usual chess-mathematical > problem for year 2009. Is it too difficult to get 2009 solutions [...] No it's not too hard -- I just forgot about it, partly because I no longer teach the chess-and-math seminar where I used my first such problem if memory serves. At least it's not too hard if one has no ambitions beyond the bare numerical task; here's an example that I cooked up over lunch, with little non-numerical content (C+ Popeye in about a minute): White Re5 Sb1 Bf6 Qd3 Kg3 Bf1 Sg1 Rh1 Pa4 Pb3 Pc2 Pd2 Pe4 Pf3 Pg2 Ph2 Black Rb8 Sa6 Bf5 Qe7 Ka8 Bf8 Sd8 Rh8 Pa7 Pb7 Pc7 Pd5 Pe6 Pf7 Pg7 Ph7 NDE 2009 +---a---b---c---d---e---f---g---h---+ | | 8 -K -R . -S . -B . -R 8 | | 7 -P -P -P . -Q -P -P -P 7 | | 6 -S . . . -P B . . 6 | | 5 . . . -P R -B . . 5 | | 4 P . . . P . . . 4 | | 3 . P . Q . P K . 3 | | 2 . . P P . . P P 2 | | 1 . S . . . B S R 1 | | +---a---b---c---d---e---f---g---h---+ dia12.5 16 + 16 (Shortest) proof game in 12.5 moves: how many solutions? Happy new year, --NDE From otto at janko.at Mon Jan 5 13:48:17 2009 From: otto at janko.at (Otto Janko) Date: Mon, 5 Jan 2009 19:48:17 +0100 Subject: [Retros] On the Jumanji convention In-Reply-To: <91E03724-283C-43DC-804A-FDEE3A586688@amherst.edu> References: <91E03724-283C-43DC-804A-FDEE3A586688@amherst.edu> Message-ID: <026A7C0F62F445F5ABF1FD2E0A810166@ww300.siemens.net> Hi Alexander, Can you grant me the permission to publics your article on the Retro Corner? 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] > -----Original Message----- > From: retros-bounces at janko.at > [mailto:retros-bounces at janko.at] On Behalf Of Alexander George > Sent: Monday, January 05, 2009 5:14 PM > To: The Retrograde Analysis Mailing List > Subject: Re: [Retros] On the Jumanji convention > > For some other thoughts about Article 16 and Werner Keym's > discussion > of it, you might be interested in my recent post in ChessProblem.net: > > http://chessproblem.net/viewtopic.php?f=10&t=290 > > Regards, > > Alexander George > > > > On Dec 30, 2008, at 6:00 AM, Rol, Guus wrote: > From afretro at yandex.ru Mon Jan 5 17:20:59 2009 From: afretro at yandex.ru (afretro) Date: Tue, 06 Jan 2009 01:20:59 +0300 Subject: [Retros] Celebration In-Reply-To: <1406477937@web.de> References: <1406477937@web.de> Message-ID: <289641231194059@webmail12.yandex.ru> Hi to all, Bernd wrote: > the way: I hope you all had a great celebration > yesterday. (The 4th of January has been named the > International Day of Chess Composition ? in case > you didn't notice... The day was quite intensely celebrated in Ukraine (at least in Dnepropetrovsk and Kiev). I am absolutely confident that we composers do deserve a holiday of our own. I would also like to join others in expressing my gratitude to Otto and Joost for the great job they are doing. Yours, Andrey 05.01.09, 14:15, "Bernd Gr?frath" : > Dear retro-enthusiasts, > many greeetings and thanks from me, too! > By the way: I hope you all had a great celebration yesterday. (The 4th of January has been named the International Day of Chess Composition ? in case you didn't notice... > Best wishes, > Bernd > > -----Urspr?ngliche Nachricht----- > > Von: "Alain BROBECKER" > > Gesendet: 05.01.09 11:27:34 > > An: retros at janko.at > > Betreff: [Retros] Happy new year (was Re:New Year's update to Retro Corner) > > > From: andrew at anselan.com > > > > > > Can I take this opportunity to give a big New Year thank > > > you to Otto and Joost for all their work maintaining and > > > extending our site. It is truly appreciated. Cheers Andy > > > > And may i join you in this opportunity? > > Thank you Otto and Joost for your work! > > > > Happy new year to all retroanalysts. > > > > Alain > > > > > > > > > > _______________________________________________ > > Retros mailing list > > Retros at janko.at > > http://www.pairlist.net/mailman/listinfo/retros > > > __________________________________________________________________ > Deutschlands gr??te Online-Videothek schenkt Ihnen 12.000 Videos!* > http://entertainment.web.de/de/entertainment/maxdome/index.html > _______________________________________________ > Retros mailing list > Retros at janko.at > http://www.pairlist.net/mailman/listinfo/retros -- ??????.????????. ?????? ???????? ? ??? ? ???????? ????? http://cards.yandex.ru/subscribe.xml From pastmaker at aol.com Mon Jan 5 18:41:57 2009 From: pastmaker at aol.com (pastmaker at aol.com) Date: Mon, 05 Jan 2009 18:41:57 -0500 Subject: [Retros] Celebration In-Reply-To: <289641231194059@webmail12.yandex.ru> References: <1406477937@web.de> <289641231194059@webmail12.yandex.ru> Message-ID: <8CB3DA6550EFA73-1380-6D1@WEBMAIL-MB13.sysops.aol.com> I am absolutely confident that we composers do deserve a holiday of ur own. Would?that be a day on which we do all the stuff that we should be doing on the other days? -----Original Message----- From: afretro To: retros at janko.at Sent: Mon, 5 Jan 2009 5:20 pm Subject: Re: [Retros] Celebration Hi to all, ernd wrote: the way: I hope you all had a great celebration yesterday. (The 4th of January has been named the International Day of Chess Composition ? in case you didn't notice... he day was quite intensely celebrated in Ukraine (at least in Dnepropetrovsk nd Kiev). I am absolutely confident that we composers do deserve a holiday of ur own. would also like to join others in expressing my gratitude to Otto and Joost or the great job they are doing. ours, ndrey 05.01.09, 14:15, "Bernd Gr?frath" : > Dear retro-enthusiasts, many greeetings and thanks from me, too! By the way: I hope you all had a great celebration yesterday. (The 4th of anuary has been named the International Day of Chess Composition ? in case you idn't notice... Best wishes, Bernd > -----Urspr?ngliche Nachricht----- > Von: "Alain BROBECKER" > Gesendet: 05.01.09 11:27:34 > An: retros at janko.at > Betreff: [Retros] Happy new year (was Re:New Year's update to Retro Corner) > > From: andrew at anselan.com > > > > Can I take this opportunity to give a big New Year thank > > you to Otto and20Joost for all their work maintaining and > > extending our site. It is truly appreciated. Cheers Andy > > And may i join you in this opportunity? > Thank you Otto and Joost for your work! > > Happy new year to all retroanalysts. > > Alain > > > > > _______________________________________________ > Retros mailing list > Retros at janko.at > http://www.pairlist.net/mailman/listinfo/retros > __________________________________________________________________ Deutschlands gr??te Online-Videothek schenkt Ihnen 12.000 Videos!* http://entertainment.web.de/de/entertainment/maxdome/index.html _______________________________________________ Retros mailing list Retros at janko.at http://www.pairlist.net/mailman/listinfo/retros -- ?????.????????. ?????? ???????? ? ??? ? ???????? ????? http://cards.yandex.ru/subscribe.xml ______________________________________________ etros mailing list etros at janko.at ttp://www.pairlist.net/mailman/listinfo/retros -------------- next part -------------- An HTML attachment was scrubbed... URL: From G.A.Rol at umcutrecht.nl Tue Jan 6 12:27:16 2009 From: G.A.Rol at umcutrecht.nl (Rol, Guus) Date: Tue, 6 Jan 2009 18:27:16 +0100 Subject: [Retros] On the Jumanji convention In-Reply-To: <91E03724-283C-43DC-804A-FDEE3A586688@amherst.edu> References: <91E03724-283C-43DC-804A-FDEE3A586688@amherst.edu> Message-ID: Alexander's first point is similar to my discussion of "rights terminology" of about a year ago. My approach was (and is) to separate the terminology connected to the proof game domain from the terminology in the action (solution) domain. The "right to castle" in a proof game is always beyond debate since the proof game is fully determined. For the RS action conventions I favored the more negotiable descriptor "castling license", as subject to withdrawal as you drivers license. "Castling permit" and "castling privilege" may be equally attractive substitute terms. The basic point is that the "proof game system" acts as a verification system for the "solution action system" - there must always be a proof game - but they need not run with identical properties on identical rule sets. In fact, article 16 quite cleverly avoids mentioning "castling rights" in clause 1 using "permissions" instead. This leaves room in article 3 to interpret the "right to castle" as a proof game property. After all, the partial objects in PRA consist of precisely those proof game groups where "castling rights" or "e.p. rights" are uniformly present. Only the RS part in the closing sentence of clause (3) which reads "the party exercising this right first" indicates that the separation of "rights" and "permissions" was not of the highest priority to its scribes. Or wasn't understood in the first place. The second point in Alexander's comment is an old favorite of his. It is true that FIDE should make an explicit allowance for the full analysis of all cases (which he calls CRAC). But even CRAC must be customized to control the administrative rules (repetitions and 50M). For one, some proof cases would certainly be immediate draws in the diagram position, and many others might draw after a reversible key-move for the same reason. Once you enter the denial or subordination of these attributes, you cannot avoid creating an administrative article 16 look-alike. Alexander is right though when he detects vagueness in article 16 "what does it mean to take into account a convention ..". The expression "take into account" is not accesible to logical evaluation and must be avoided in a pretty formal article. Fortunately we all know what is meant since we have been around for so long, but only for that reason! As I do not believe that CRAC can effectively avoid the reduction of "all cases", I can sympathize with the intent of article 16 part (3) to eliminate the "undesirable histories". The definitive justification can be found in the creative retrograde potential of article 16 compared to CRAC which is about a million to one. Allowing for CRAC should therefore not lead us into the temptation to reject the PRA and RS (and AP) logics. Finally, Alexander made a keen observation on the squaring of the "partial" attribute. "Partial Retrograde Analysis" is not now the "retrograde analysis of the parts" but it is only the "partial retrograde analysis of the parts". PRAP if you like. Guus Rol. -----Oorspronkelijk bericht----- Van: retros-bounces at janko.at [mailto:retros-bounces at janko.at] Namens Alexander George Verzonden: maandag 5 januari 2009 17:14 Aan: The Retrograde Analysis Mailing List Onderwerp: Re: [Retros] On the Jumanji convention For some other thoughts about Article 16 and Werner Keym's discussion of it, you might be interested in my recent post in ChessProblem.net: http://chessproblem.net/viewtopic.php?f=10&t=290 Regards, Alexander George _______________________________________________ Retros mailing list Retros at janko.at http://www.pairlist.net/mailman/listinfo/retros From G.A.Rol at umcutrecht.nl Wed Jan 7 09:32:34 2009 From: G.A.Rol at umcutrecht.nl (Rol, Guus) Date: Wed, 7 Jan 2009 15:32:34 +0100 Subject: [Retros] Article 16 and Ceriani's example In-Reply-To: <91E03724-283C-43DC-804A-FDEE3A586688@amherst.edu> References: <91E03724-283C-43DC-804A-FDEE3A586688@amherst.edu> Message-ID: [see in the Retro Corner: "Partial Retrograde Analysis" and "Retro Strategy" in the modified Codex by Werner Keym, Meisenheim] Werner Keym presents one of Ceriani's compositions as example 4 in his clarification to the new article 16 in the Codex. He makes the point that it is self-evident that this problem should be understood as a PRA problem rather than an RS problem since the PRA solution includes and exceeds the RS solution. I analyzed this problem a few years ago and concluded that neither the RS nor the PRA interpretation is satisfactory. Looking at Ceriani from a PRA standpoint we can readily observe that the on/off state of the white castling right 0-0 plays no relevant role in controlling the "PRA parts". The move 0-0 only serves to avoid the knight check in the variation where such is required. This becomes clear when you change wPc2 to c4. In spite of the fact that the white and black castlings are no longer mutually exclusive, the 2 partial solutions remain precisely the same. Instead of changing the Pawn position one might also place wKe1 on e2. Eliminating the white castling right altogether while simultaneously disabling the potential check still delivers the same partial solutions but this time Rf1 replaces 0-0 in one solution part. In RS, the opposite is true. Both suggested modifications to the PRA setting would make the RS solution fail. The e.p. state, so important in the PRA version, cannot be capitalized on (by convention) and therefore disappears from the picture. Removing bNa1 and moving wPb3 to a2 (and possibly a few other changes) creates a position which illustrates that the white castling choice is primarily motivated by the need to apply retro-strategy. The check escape is only the duplicate argument here. The comparison of the RS and RV approach tells us that the PRA solution only seemingly overlaps the RS solution. As seen from the previous analysis, the vital argument in the RS solution - mutual exclusivity of white and black castling rights - has zero significance in the PRA solution. The content of the white castling variants in the RS and the PRA approach can therefore not be considered "the same" and it becomes dubious to justify that Ceriani's problem is "obviously" PRA and not RS. Which in turn indicates that Cerinani's example may not be the most appropriate elucidation to article 16, clause(3). Another way to look at it is by conceiving Ceriani's creation as neither RS nor PRA. Possibly a twin of both logics, but not a very successful one considering the duplicate arguments and one identical key move. There are other ways to classify problems like these, and Valery Liskovets has made an earlier attempt at that. In due time I will give my own view but such is outside the current scope of evaluating the match between article 16 and Ceriani's 1960 composition. Guus Rol. From liskov at im.bas-net.by Fri Jan 9 06:52:20 2009 From: liskov at im.bas-net.by (Valery Liskovets) Date: Fri, 09 Jan 2009 13:52:20 +0200 Subject: [Retros] Article 16 and Ceriani's example References: <91E03724-283C-43DC-804A-FDEE3A586688@amherst.edu> Message-ID: <49673A74.F5CBF171@im.bas-net.by> A.Kornilov and me in the article "Die partielle Synthese in Retroproblemen", Die Schwalbe, 1986, h.99, 66-68, interpreted this famous controversial two-mover by L.Ceriani as a HYBRID stipulated "AL(&PF)" (where "AL" (ad libitum) is equivalent to "PRA, Typ Keym" and "PF" (post factum) is similar to "RS"). A TRIPLE retro-relationship: Bl castling [right] excludes W castling [right] but implies e.p. [right]. I.1.0-0! (0-0-0??); II.1.cxb6+ e.p.! Valery Liskovets Rol, Guus wrote: > [see in the Retro Corner: "Partial Retrograde Analysis" and "Retro > Strategy" in the modified Codex by Werner Keym, Meisenheim] > > Werner Keym presents one of Ceriani's compositions as example 4 in his > clarification to the new article 16 in the Codex. He makes the point > that it is self-evident that this problem should be understood as a PRA > problem rather than an RS problem since the PRA solution includes and > exceeds the RS solution. I analyzed this problem a few years ago and > concluded that neither the RS nor the PRA interpretation is > satisfactory. > > Looking at Ceriani from a PRA standpoint we can readily observe that the > on/off state of the white castling right 0-0 plays no relevant role in > controlling the "PRA parts". The move 0-0 only serves to avoid the > knight check in the variation where such is required. This becomes clear > when you change wPc2 to c4. In spite of the fact that the white and > black castlings are no longer mutually exclusive, the 2 partial > solutions remain precisely the same. Instead of changing the Pawn > position one might also place wKe1 on e2. Eliminating the white castling > right altogether while simultaneously disabling the potential check > still delivers the same partial solutions but this time Rf1 replaces 0-0 > in one solution part. > > In RS, the opposite is true. Both suggested modifications to the PRA > setting would make the RS solution fail. The e.p. state, so important in > the PRA version, cannot be capitalized on (by convention) and therefore > disappears from the picture. Removing bNa1 and moving wPb3 to a2 (and > possibly a few other changes) creates a position which illustrates that > the white castling choice is primarily motivated by the need to apply > retro-strategy. The check escape is only the duplicate argument here. > > The comparison of the RS and RV approach tells us that the PRA solution > only seemingly overlaps the RS solution. As seen from the previous > analysis, the vital argument in the RS solution - mutual exclusivity of > white and black castling rights - has zero significance in the PRA > solution. The content of the white castling variants in the RS and the > PRA approach can therefore not be considered "the same" and it becomes > dubious to justify that Ceriani's problem is "obviously" PRA and not RS. > Which in turn indicates that Cerinani's example may not be the most > appropriate elucidation to article 16, clause(3). > > Another way to look at it is by conceiving Ceriani's creation as neither > RS nor PRA. Possibly a twin of both logics, but not a very successful > one considering the duplicate arguments and one identical key move. > There are other ways to classify problems like these, and Valery > Liskovets has made an earlier attempt at that. In due time I will give > my own view but such is outside the current scope of evaluating the > match between article 16 and Ceriani's 1960 composition. > > Guus Rol. > _______________________________________________ > Retros mailing list > Retros at janko.at > http://www.pairlist.net/mailman/listinfo/retros From otto at janko.at Fri Jan 9 13:06:18 2009 From: otto at janko.at (Otto Janko) Date: Fri, 9 Jan 2009 19:06:18 +0100 Subject: [Retros] Another Update of the Retro Corner Message-ID: Dear Retro Friend, The Retro Corner has been updated several times in the last few days: a) Articles: Conventions In Retroanalysis (by Alexander George) The Constructivist Retroanalyst (by Alexander George) There Is No Place Like Home: Using Home Squares in SPGs (by Roberto Osorio & Andrey Frolkin) b) Recent Retro Problems: Probleemblad, Oct-Dec 2008 c) Solutions added: Probleemblad, all missing solutions 2001-2008 --- Probleemblad should now be complete, problems and solution - thanks to Joost! There are now about 4000 retro problems on the Retro Corner. You can download the complete Retro Corner and save it locally on your computer: http://www.janko.at/Retros/RetroCorner.zip (28 MB) This file will not be updated regularly. If you own the rights on an article with retro content and whish to have it published on the Retro Corner, please send mail to otto at janko.at (as Roberto did). 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 joaquimchessproblem at gmail.com Sat Jan 10 15:17:42 2009 From: joaquimchessproblem at gmail.com (Joaquim Crusats) Date: Sat, 10 Jan 2009 21:17:42 +0100 Subject: [Retros] =?iso-8859-1?q?a_problem_by_J=FAlius_Sunyer?= Message-ID: <953bd3d40901101217k7633a905q26838f3eedcf0cd7@mail.gmail.com> I need some help with a problem published by Dr. J?lius Sunyer in 1930. Jordi Breu, a Catalan composer now aged 81 is preparing a new home-made edition of "Selecci? dels Problemes compostos per Josep Paluzie" (in Catalan language, "Selection of Problems composed by Josep Paluzie") mostly for historical reasons so that some copies can be preserved in the National Library of Catalonia for future chess composers interested in the history of chess composition in Catalonia. The book includes the problems that "El Club d'Escacs Barcelona" (Barcelona Chess club) published in "Els Escacs a Catalunya" (Chess in Catalonia) in 1930 in a homage dedicated to Josep Paluzie. Among the problems there was the one below by J?lius Sunyer, another well-known Catalan composer of retros (as I have found out in the Retrograde Analysis Corner). The problem, which I did not find in the PDB Server, is the following: 8/pppppp1p/8/6N1/8/5P1P/P1NPPP1k/rb3Knn Add two white pieces (none of them on g3) and then white #1 ELS ESCACS A CATALUNYA, December,1930, pages 670-671. The solution by Sunyer was published in the same magazine, February 1931, p.718. Solution: Add a wBd1 and a wRg4 and 1.Rg2# The main ideas in Sunyer's solution are the following: Black played last, the only possible move was b1=B. All captures by black took place in black squares, thus the wB initially in f1 must still be on the board. Since it is not the piece that can deliver the mate it must be on d1 because when black promoted, the bRa1 couldn't be checking the wK. Now there is some reasoning to exclude a mate by the wQ. Owing to the fact that all the knights are still on the board, and given the pawn structure, the first capture had to be gxQf6. Since the wB on dark squares can not mate, the only possible solution is the one above. However, Dr Sunyer was very self critic about the need of the statement (none of them on g3). Paluzie wondered whether or not the problem could be improved. So I would be most grateful if you could comment on the following points: a) is the problem cooked? The initial position (including the two additional pieces) seems to be easily legal, b) has the problem been reprinted somewhere else? c) can you see any way to improve the problem keeping all the original content in such a way that a mate by a wQ cannot be initially ruled out (and ideally the mate by the wQ should be also unique as the intended one by the wR) without the need of any additional statement added to the stipulation? J.Breu would like to use the comments in the new edition of the booklet, but of course only if you agreed. Thanks in advance, Joaquim Crusats -------------- next part -------------- An HTML attachment was scrubbed... URL: From mvalg at velucchi.it Fri Jan 16 07:59:54 2009 From: mvalg at velucchi.it (Mario Velucchi) Date: Fri, 16 Jan 2009 13:59:54 +0100 Subject: [Retros] obtaining Ceriani's books Message-ID: <29b3a48a0901160459g3344069aj73d56240ab87908c@mail.gmail.com> *I forward Your message to Dr. PierLuigi Molinari, one more iIsend to you the news about a near-ready new book number 3, by Ceriani, I am a little connected to the project. best .marioV** ** From: Shaul Horwitz To: retros at janko.at Date: Sat, 20 Dec 2008 11:59:39 -0800 (PST) Subject: [Retros] obtaining Ceriani's books 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,* -- best .marioV -- Mario Velucchi via Emlia, 106 I-56121 Pisa ? ITALY mvalg at velucchi.it _ www.velucchi.it _ skype:velucchi phone +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 -------------------------------------------------------------------------------------------------------------- www.velucchi.it/enjoyments www.velucchi.it/eBrain www.velucchi.it/dBlog -------------- next part -------------- An HTML attachment was scrubbed... URL: From mvalg at velucchi.it Sun Jan 18 08:11:39 2009 From: mvalg at velucchi.it (Mario Velucchi) Date: Sun, 18 Jan 2009 14:11:39 +0100 Subject: [Retros] Outrageous Chess Problems by Burt Hochberg Message-ID: <29b3a48a0901180511r3bd7b23ehb45415da3b6648b7@mail.gmail.com> *Outrageous Chess Problems by Burt Hochberg* *http://www.chesscafe.com/text/review489.pdf* -- best .marioV -- Mario Velucchi via Emlia, 106 I-56121 Pisa ? ITALY mvalg at velucchi.it _ www.velucchi.it _ skype:velucchi phone +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 -------------------------------------------------------------------------------------------------------------- www.velucchi.it/enjoyments www.velucchi.it/eBrain www.velucchi.it/dBlog -------------- next part -------------- An HTML attachment was scrubbed... URL: From raosorio at fibertel.com.ar Sun Jan 25 07:10:42 2009 From: raosorio at fibertel.com.ar (raosorio at fibertel.com.ar) Date: Sun, 25 Jan 2009 09:10:42 -0300 Subject: [Retros] Orbit 39 Message-ID: Hi, These are the retro problems published in Orbit 39; solutions included at the end. (I) Leonid Borodatov (r3k3/2K5/8/3PPP2/2NpPpP1/3N 1P1P/4PB1p/R6R) H#2 * AP (14+5) (II) Leonid Borodatov (4k2r/8/1N5P/BPP3NP/qpP3P1/rp3B1P/RK4PR/8) H#2 AP (15+6) (III) Sergio Orce (Bn6/k7/P2P4/8/1K6/8/8/8) Retractor type Proca - 3 & #1 (4 + 2) (IV) Itamar Faybish (2R1kbnr/p1ppp1pp/8/8/8/PQ6/q2P1PPP/1NB1K1NR) PG 10.5 (12+11) C+ (V) Paul Raican (1n1qkbnr/rppppp1p/5P2/4pN1B/1P5P/NP2PR2/2PPK2B/8) PG 28.0 (13+14) C- (VI) Satoshi Hashimoto (6R1/5N2/1QP2P2/pppppppp/2PRB3/1P3P2/1P1KPPk1/2B2N2) PG 24.5 (16+9) C- (VII) Nicolas Dupont (3B1kB1/1b1np2p/1p4r1/3n4/2p2pq1/p2P2Pr/PP1bPK1P/RN1Q2NR) PG 21.5 (14+14) Antecedent (rnkq2nr/1pp2ppp/6P1/6QP/3PR1P1/4B2N/P3P1BN/1KR5) R. Aschwanden PG 20.0 Best, Roberto SOLUTIONS - Comments, Roberto Osorio (RO), Valery Liskovets (VL), Jorge Lois (JL) ----------------------------------------------------------------------------------------- I) 1.-, Kd6 2. Kd8, RxRa8# (set play) 1. f4xg3 e.p.! (retroplay 1. g2-g4, g3xQh2), Kc6 2. O-O-O! (argument for e.p.), Ra8# There is no waiting move and after ep, castling should be done to justify ep! WPs d, e and f captured 10 men, so 10+5+Ph7=16 and then white could not capture in his last move . h4xg3xh2 was impossible because the captured wB was the light squares one.. So, indeed, unless 000 is destroyed, the last moves could be only g2-g4 and g3xh2 (VL) / 1?.,Kd6? 2.Kd8 would not prove the e.p. capture right, a typical try (RO). II) 1.b4xc3 e.p.!, Bxc3 2. O-O!, h7# (Retroplay: 1. c2-c4!, c4xQb3 2.Qd3-b3, Rc3-a3) Again, 10 black men were captured and the balance is equivalent to the previous problem. The only one white retraction capable to keep the black castling right is 1. c2-c4! followed by the explained retroplay. A thematic couple of problems showing The e.p. & castling rights dependency (RO) / A pity that it doesn't contain a thematic try: an (illegal) mate without 00 after ep (VL). III) -1.c5xd6 e.p., d7-d5 -2. Ka5xb4, b5-b4 -3. Bc6xRa8! (.-3.Bc6?, Ka8xRa7!! shows that b7-b5 was not necessarily the last black move) and, 1. c5xb6 e.p.# (A) / A nice miniature that starts with an e.p. retraction and ends with an e.p. mate (RO). IV) 1.Pc2-c4 Pf7-f5 2.Pc4-c5 Pf5-f4 3.Pc5-c6 Pf4-f3 4.Pc6xb7 Pf3xe2 5.Pb7xc8=R Pe2xf1=B 6.Rc8xb8 Bf1-a6 7.Rb8xa8 Qd8-b8 8.Pa2-a3 Ba6-c8 9.Ra1-a2 Qb8xb2 10.Qd1-b3 Qb2xa2 11.Ra8xc8 Many Tourney themes in a short sequence: an officer captures an officer / Gianni Donatti 50th JT (switchback of a promoted piece from and to its promotion square) / Kostas Prentos 40th JT (a promoted piece is captured by an officer) / Messigny 2008 (a promoted piece is captured by another promoted piece) (RO). V) COOKED 1.Ph2-h4 Pa7-a5 2.Rh1-h3 Pa5-a4 3.Rh3-f3 Pa4-a3 4.Rf3-f6 Pg7xf6 5.Pb2-b4 Bf8-h6 6.Bc1-b2 Ke8-f8 7.Bb2-e5 Kf8-g7 8.Be5-h2 Bh6-f4 9.Pe2-e3 Sg8-h6 10.Qd1-h5 Qd8-g8 11.Qh5-e5 Pf6xe5 12.Bf1-e2 Kg7-f6 13.Be2-h5 Qg8xg2 14.Ke1-e2 Qg2-d5 15.Sg1-f3 Qd5-b3 16.Pa2xb3 Pa3-a2 17.Sb1-a3 Ra8-a7 18.Ra1-g1 Pa2-a1=Q 19.Rg1-g8 Qa1-g1 20.Rg8xc8 Qg1-g7 21.Rg8 Qf8 22.Rg3 Sg8 23.Sd4 Bh6 24.f4 Qd8 25.Rf3 Kg7 26.f5 Kf8 27.f6 Ke8 28.Sf5 Bf8. Queen-sarcophagus (A) / bQ Pronkin plus bK, bN and bB switchbacks; quite a term (sarcophagus) to refer to a Phenix piece standing on a square ?entombed? by its own army (RO). VI) 1. d4 a5 2. d5 Ra6 3. Qd4 Rb6 4. Sd2 Rb3 5. axb3 b5 6. Qb6 c5 7. Ra4 Sc6 8. dxc6 d5 9. Rd4 Bg4 10. c4 Bf3 11. gxf3 e5 12. Bh3 Ke7 13. Bf5 Kf6 14. Be4 Kg5 15. Sh3+ Kh4 16. Sg5 f5 17. Sf7 Kh3 18. Sf1 Kg2 19. h4 Qg5 20. hxg5 Sf6 21. gxf6 g5 22. Kd2 Bh6 23. Rxh6 Rg8 24. Rg6 h5 25. Rxg8. Black pawn double steps in alphabetical order; all black officers moved to be captured (A) / Nice added value (alphabetical order) on a well known task (displaced pawn line) (JL). VII) 1. Pf2-f4 Pb7-b5 2. Pf4-f5 Fc8-b7 3. Pf5-f6 Dd8-c8 4. Pf6xg7 Pf7-f5 5. Pc2-c4 Cg8-f6 6. Pg7-g8=F Ff8-h6 7. Pc4-c5 Re8-f8 8. Fg8-b3 Th8-g8 9. Pc5-c6 Tg8-g6 10.Pc6xd7 Pc7-c5 11. Pd7-d8=F Pc5-c4 12. Fd8-b6 Pa7xb6 13. Re1-f2 Ta8-a3 14. Fb3-a4 Ta3-h3 15. Pd2-d3 Pb5xa4 16. Fc1-f4 Pa4-a3 17. Ff4-c7 Fh6-d2 18. Pg2-g3 Pf5-f4 19. Ff1-g2 Dc8-g4 20. Fg2-d5 Cb8-d7 21. Fd5-g8 Cf6-d5 22. Fc7-d8. Two anti-Pronkin bishops from the same side. Cross captures (A) / See the R. Aschwanden?s antecedent: (1. h4 d5 2. h5 d4 3. Th4 d3 4. Sh3 dxc2 5. d4 a5 6. Dd2 a4 7. Dg5 a3 8. Le3 c1=L 9. f4 Ld2+ 10. Sxd2 axb2 11. Sf3 b1=L 12. Sh2 Lg6 13. f5 e5 14. fxg6 Lf5 15. 0-0-0 Lb1 16.Kxb1 e4 17. Txe4+ Kd7 18. g4 La3 19. Lg2 Lc1 20. Txc1 Kc8); the motivation here is that the (a) and (d) bP had to promote in order to be captured and after that there is no other square to capture the original bishops than the promotion ones. In the Dupont?s? problem the (a) and (b) bP had to make a cross capture in order to allow the bR to reach h3 in two moves (see ?Selected problems? to complete the discussion on this theme) (RO). From mvalg at velucchi.it Sun Jan 25 09:20:26 2009 From: mvalg at velucchi.it (Mario Velucchi) Date: Sun, 25 Jan 2009 15:20:26 +0100 Subject: [Retros] Proof game in 27 moves ... Message-ID: <29b3a48a0901250620l3ae6e0e7vf5980913c2f4ff90@mail.gmail.com> http://www.youtube.com/watch?v=Lr8mLumXXGA http://www.youtube.com/watch?v=BM0E0drec50 http://www.youtube.com/user/SHX153 http://www.youtube.com/user/vorojtsov http://shx153.blog.cz/ -- best .marioV -- Mario Velucchi via Emlia, 106 I-56121 Pisa ? ITALY mvalg at velucchi.it _ www.velucchi.it _ skype:velucchi phone +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 -------------------------------------------------------------------------------------------------------------- www.velucchi.it/enjoyments www.velucchi.it/eBrain www.velucchi.it/dBlog -------------- next part -------------- An HTML attachment was scrubbed... URL: From mvalg at velucchi.it Sun Jan 25 10:18:47 2009 From: mvalg at velucchi.it (MValg. - H&Sc.) Date: Sun, 25 Jan 2009 16:18:47 +0100 Subject: [Retros] =?utf-8?b?UmVrb3JkeSB2IHByb2Jsw6ltb3bDqW0gxaFhY2h1IC0g?= =?utf-8?b?0KjQsNGF0LzQsNGC0L3Ri9C1INC60L7QvNC/0L7Qt9C40YLQvtGA0Ysg?= =?utf-8?b?0LLRgdC10YUg0YHRgtGA0LDQvSwg0L7QsdGK0LXQtNC40L3Rj9C50YI=?= =?utf-8?b?0LXRgdGMIQ==?= Message-ID: Rekordy v probl?mov?m ?achu ????????? ??????????? ???? ?????, ?????????????! http://www.popovgl.narod.ru/ best .marioV -- Mario Velucchi via Emlia, 106 I-56121 Pisa ? ITALY mvalg at velucchi.it _ www.velucchi.it _ skype:velucchi phone +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 --------------------------------------------------------------------------------------------------- www.velucchi.it/enjoyments www.velucchi.it/eBrain www.velucchi.it/dBlog -------------- next part -------------- An HTML attachment was scrubbed... URL: From Jens.Guballa at online.de Sun Jan 25 16:45:48 2009 From: Jens.Guballa at online.de (Jens Guballa) Date: Sun, 25 Jan 2009 22:45:48 +0100 Subject: [Retros] Stuttgarter Zeitung: Christmas Contest In-Reply-To: <20081222123623.216709b8@zulu> References: <20081222123623.216709b8@zulu> Message-ID: <20090125224548.146b4061@zulu> Dear retro friends, here are the solutions for the Christmas Contest of the Stuttgarter Zeitung: I shortened the translation, the original text with some more comments given by the solver is available here (only in German): http://www.kaniaverlag.de/htm/Weihnachts2008.html#1 A: Obviously, -Ng2, then 1. Rgg2 and Qf8#. Indeed, there is another solution: -Pd5. Black has no last move and is in Zugzwang: 0. ... Ke2: 1. Qd8 Kf3/Kf1 2. Qd1# or 0. ... Kg4: 1. Qa5 Kf3/Kh3 2. Qh5. B: White retracts Kc8xPb7. The white king moved to c8 via d7/d8, thus black cannot castle anymore. Therefore the solution is 1. f5-f6 and 2. Rd8#. The retraction Kc8-b7 is not suffcient because the last black move could have been h7-h6 (or g7xh6), and thus black has the right to castle. C: Besides the given example (+wBa1, +bPd5, last move was e5-e6+) there are the following solutions: a) +bPg7, +wRg8: last move was f7xNg8=R#. The captures piece on g8 can be only a knight. b) +bPg6, +bBh6: last move was g7-g6+. c) +wPf4!, +wBa1: last moves were d5xPe6 e.p+, e7-e5, d4-d5+, e5xXf4. The pawn on f4 forbids the solution e5-e6+, because black has no last move in that case. D: Candidates for the last black move are only b7-b6 and e7-e5. After +Nc8 b7-b6 is illegal: Two promoted black pieces are on the board, but only one black pawn is missing. The position with e7-e5 is legal, bBf8 was captured on f8, the bRR and the bQ were captured by the white pawns. The black f-pawn captured the white knight and promoted on e1 or g1. Thus 1. f5xe6 e.p.+ h7xg6 2. Qf7xg6#. Second solution: +bBb8. Black has no last move and checkmates with 1... c7-c6+ 2. Kd5xe5 Bb8xd6#. The last move b7-b6? requires that the bBb1 is a promoted piece, but there are not enough white chess men missing. The white pawns a+b have not promoted (to be captured by the black f-pawn), as too less material is available for a cross capture of the pawns. And e7-e5? is not possible, because then the bBb8 must be a promoted piece (on a1/c1), but for that too much material is needed. Failing attempts: +bBc8?: Last move could be b7-b6, white b-pawn promoted (b6xRa7 and a7-a8=N), and the black f-pawn captured the two knights and promoted into the white squared bishop. +bBg8?: This position is only legal if black has the move, but in this case there is not checkmate. E: To give checkmate with Rd8# another piece must be uncaptured: 1. g5xBh6! (bishop has promoted on g1, three pieces were captured) f6-f5/a7-a6 (f7-f5? illegal due to white's king position, b6-b5? or b7xNa6? or e6xNf5? illegal due to missing material for the captures) 2. a4-a5 a7-a6/f6-f5 3. c2xBb3! Ba2xNb3+ (Ba2xBb3? is illegal because the square of the bishop has the wrong color) 4. Nd4-b3 (4. Na5-b3? Bb1-a2+ 5. Nb7-a5/Nc6-a5 leads to a retro stalemate) Bb1-a2+ 5. Ne6-d4 (5. Nc6-d4? leads to a retro stalemate, this trick was overlooked by several strong solvers) no retro stalemate (Ba2-b1), and now forward: 1. Rd7-d8#. Failing attempt: 1. a4-a5? b6-b5!! (1... b7xNa6? 2. Nb8xBa6 ... 3. Nc6-b8 and forward 1. Rd7-d8#; 1... e6xNf5? 2. Nd4-f5 a7-a6 3. Nc6xXd4 and forward 1. Rd7-d8#) and 2. c2xBb3? is illegal, because the captures must have been bBa2xNb3+, bPb7xNa6 and bPa7xBb6 (only this way the white rook can enter the black camp), but this requires that white has captured all black missing chess men, including the black h-pawn. But this pawn could not have left the h-file as the wRh1 is out of reach. 71 solver send their solutions, 45 of them made it to the drawing lot (problems A + B solved correctly). Here are the winners: 1. Irma Maurer, Rupertshofen (Falk navigation system) 2. Ronald Sch?fer, Aalen (Apple I-Pod) 3. Jens Guballa, Tamm (Panasonic mirco wave grill) Winner of the expert contest (solving all five problems correctly) are the following eleven solvers: Silvio Baier (Dresden), Dietmar Fauth (Munic), Andrey Frolkin (Kiew), Norbert Geisler (Munic), Jens Guballa (Tamm), Olli Heimo (Helsinki), Kurt Lorenz (Marbach), Thomas Lutzius (Stuttgart), Frank Moralee (Brough/England), Rolf Schreiber (Stuttgart), Klaus Wenda (Vienna). The following solvers were close to the correct solutions: Hans Bergmann (Aalen), Gerson Berlinger (Friedrichshall), Randolf Eilenberger (Dossenheim), Nils Empacher (Stuttgart), Martin Kummer (Karlsruhe), Markus Knapp (Gro?eicholzheim), Peter Michael (Goslar), Mario Richter (Berlin), Ronald Sch?fer (Aalen) and Bernd Schwarzkopf (Neuss). They all will also receive a book price. Best regards, Jens From mvalg at velucchi.it Thu Jan 29 02:47:04 2009 From: mvalg at velucchi.it (Mario Velucchi) Date: Thu, 29 Jan 2009 08:47:04 +0100 Subject: [Retros] Hesse: expeditions in the World Chess Message-ID: <29b3a48a0901282347r2873757au67df5106c507f3a0@mail.gmail.com> http://www.chessgate.de/buch_expeditionen.html * http://translate.google.com/translate?prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Fwww.chessgate.de%2Fbuch_expeditionen.html&sl=de&tl=en&history_state0= * Chessgate ------------------------------ Direkt zum Seiteninhalt Hauptmen? - Aktuell - B?cher - Impressum ------------------------------ Buch_Expeditionen [image: Cover 'Expeditionen in die Schachwelt'] Hesse: Expeditionen in die Schachwelt EURO 28,80 417 Seiten Gebunden 2. Auflage 2007 Deutsch ISBN-13: 978-3935748148 Leseprobe Leseprobe_Expeditionen.pdf ?ber das Buch Prof. Dr. Christian Hesse f?hrt den Leser mit diesem Buch zu faszinierenden Sehens-, Denk- und Merkw?rdigkeiten der Schachwelt. In vierundneunzig Expeditionen in Sachen Schach wird mit freundlichem Augenzwinkern und wohldosierter Nachdenklichkeit allerlei Tiefgr?ndiges, Leichtf??iges und Schwergewichtiges erkundet: Die Vielv?terstellung, der meist?bersch?tzte Zug, das schwerste Problem und auch getr?umte Gro?meisterpartien, brillante Fehler, schicksalhafte Z?ge, krasse Au?enseitersiege sind ein Teil der Impressionen - von imposant ?ber interessant bis geistreich und wundersch?n. Mit einem Vorwort von Wladimir Kramnik. ?ber den Autor Hesse promovierte an der Harvard University (USA) und lehrte an der University of California, Berkeley (USA). Seit 1991 ist er Professor f?r Mathematik an der Universit?t Stuttgart, seine Forschungsschwerpunkte liegen im Bereich der Wahrscheinlichkeitstheorie. In seiner Freizeit besch?ftigt er sich mit Schach und Literatur und betreibt Fitnesssport und Boxen in ?berschaubaren Ma?en. Zu seinen bevorzugten Helden in allen Lebenslagen geh?ren jene, die zu Boden gehen und wieder aufstehen, zu Boden gehen und wiederaufstehen, ... Sein Lieblingsmaler ist der Herbst, und schachlich gef?llt ihm Fu?balltrainer Felix Magaths Diktum, dass Schach - aufgrund der Figuren - auch eine Mannschaftssportart ist. Rezensionen "Hesses Expeditionen in die Schachwelt geh?rt zu den geistreichsten und lesenswertesten B?chern, die je ?ber das Schachspiel verfasst wurden." E.Strouhal, Der Standard "... Ich wette: Wer dieses Buch einmal gelesen hat, wird danach unmittelbar vom Schachvirus befallen werden. Obwohl als Weihnachtsgeschenk sicher hervorragend geeignet, werden wohl nur wenige Exemplare den Weg unter den Weihnachtsbaum finden. Denn wer w?rde so ein sch?nes Buch schon verschenken und nicht lieber selber behalten? Expeditionen in die Schachwelt wurde vom Chessgate Verlag publiziert, ist gebunden und besitzt die von diesem Verlag gewohnt gute und sorgf?ltige Verarbeitung und Aufmachung, inkl. eines n?tzlichen Registers. Ein Muss f?r alle Schachspieler und solche, die nie gedacht h?tten, mal selbst einer zu werden. ..." A.Schulz, ChessBase.de ------------------------------ ------------------------------ Zur?ck zum Seiteninhalt| Zur?ck zum Hauptmen? -- best .marioV -- Mario Velucchi via Emlia, 106 I-56121 Pisa ? ITALY mvalg at velucchi.it _ www.velucchi.it _ skype:velucchi phone +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 -------------------------------------------------------------------------------------------------------------- www.velucchi.it/enjoyments www.velucchi.it/eBrain www.velucchi.it/dBlog -------------- next part -------------- An HTML attachment was scrubbed... URL: