56 problem(s) found in 2452 milliseconds (displaying 56 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND S='Phenix' AND K='Eindeutige Beweispartie'] [download as LaTeX]
1. Sf3 f5 2. Sd4 Kf7 3. Sb5 Kg6 4. Sd6 exd6 5. e4 Le7 6. e5 Lh4 7. e6 Df6 8. e7 Dxb2 9. e8=S Se7 10. Lc4 Tf8 11. 0-0 Tf6 12. f3 Kh5 13. Te1 Th6 14. Lf7+ Sg6 15. Te7 Dxc1 16. De1 Dxd2 17. De6 dxe6 18. Td7 Dg5 19. Sxg7#
Cook: 1. d4 g5 2. Sf3 Lg7 3. e4 Lxd4 4. e5 Lxb2 5. Dd6 exd6 6. e6 f5 7. e7 Kf7 8. e8=S Se7 9. Sxg5+ Kg6 10. Lc4 Kh5 11. 0-0 Tg8 12. Te1 Tg6 13. f3 Th6 14. Lf7+ Sg6 15. Te7 Lf6 16. Se6 dxe6 17. Td7 Lh4 18. Lg5 Dxg5 19. Sg7#
Cook: 1. d4 g5 2. Sf3 Lg7 3. e4 Lxd4 4. e5 Lxb2 5. Dd6 exd6 6. e6 f5 7. e7 Kf7 8. e8=S Se7 9. Sxg5+ Kg6 10. Lc4 Kh5 11. 0-0 Tg8 12. Te1 Tg6 13. f3 Th6 14. Lf7+ Sg6 15. Te7 Lf6 16. Se6 dxe6 17. Td7 Lh4 18. Lg5 Dxg5 19. Sg7#
Keywords: Unique Proof Game, Castling, Promotion
Genre: Retro
FEN: rnb5/pppR1BNp/3pp1nr/5pqk/7b/5P2/P1P3PP/RN4K1
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2006-10-15 more...
Genre: Retro
FEN: rnb5/pppR1BNp/3pp1nr/5pqk/7b/5P2/P1P3PP/RN4K1
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2006-10-15 more...
1. c4 c5 2. Db3 Db6 3. Dh3 Dh6 4. b3 b6 5. La3 La6 6. Lb4 Lb5 7. Sa3 Sa6 8. 0-0-0 0-0-0 9. Kb1 Kb8 10. Tc1 Tc8 11. Tc3 Tc6 12. Tg3 Tg6 13. Tg4 Tg5 14. g3 g6 15. Lg2 Lg7 16. Ld5 Ld4 17. Sf3 Sf6 18. Tc1 Tc8 19. Tc3 Tc6 20. Te3 Te6 21. Te4 Te5 22. Tef4 Tef5 23. e4 e5
Keywords: Unique Proof Game, Castling (wgsg), Symmetrical position, Capture-free
Genre: Retro
Computer test: Mondenhauer C+ Stelvio 1.11 00:09:39 Minuten. (hh:mm:ss) Keine Lösung: BP 22.0, BP 22.5.
FEN: 1k6/p2p1p1p/np3npq/1bpBprr1/1BPbPRR1/NP3NPQ/P2P1P1P/1K6
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-03-27 more...
Genre: Retro
Computer test: Mondenhauer C+ Stelvio 1.11 00:09:39 Minuten. (hh:mm:ss) Keine Lösung: BP 22.0, BP 22.5.
FEN: 1k6/p2p1p1p/np3npq/1bpBprr1/1BPbPRR1/NP3NPQ/P2P1P1P/1K6
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-03-27 more...
3 - P0006623
Thierry Le Gleuher
1853v Phénix 50 03/1997
3. ehrende Erwähnung
(16+16) cooked
BP in 40.5
Thierry Le Gleuher
1853v Phénix 50 03/1997
3. ehrende Erwähnung
(16+16) cooked
BP in 40.5
1. a4 h5 2. Ta3 Th6 3. Tc3 Tb6 4. Tc4 Tb3 5. Sc3 Ta3 6. b3 Ta1 7. La3 d5 8. Db1 Lf5 9. Kd1 Lh7 10. Kc1 g6 11. Kb2 Lh6 12. Da2 Tc1 13. Sb1 Le3 14. Kc3 Lb6 15. Kd3 c5 16. Ke3 Sc6 17. Kf4 Dc7+ 18. Kg5 0-0-0 19. h4 Td6 20. Th3 Tf6 21. Te3 Tf3 22. Te6 Sf6 23. Kh6 Th3 24. Kg7 Th1 25. Kf8 Dh2 26. g3 Se5 27. Tc6+ Kd7 28. Tc8 Ke6 29. Lg2 Kf5 30. Le4+ Kg4 31. Sf3 Kh3 32. Lf5+ Kg2 33. Tg4 Lg8 34. Sd4 Sh7+ 35. Ke8 Sf3 36. Kd7 Kf1 37. Te8 Ke1 38. Kc8 Kd1 39. Kb8 Te1 40. Lc8 Sg1 41. f3
Yoav Ben-Zvi: The cook found in P0002554 re-opens the question of the current length record for unique capture-free SPG. A search in PDB finds this problem, assuming it is sound, to be the record holder, until Unto Heinonen publishes a correction (expected very soon). Prior to publication of this problem the record was 38.5, in Michel Caillaud's P0002187. (2019-07-10)
Michel Caillaud: cooked (testing last moves with Jacobi 0.7.5 and constraints) :
16...Sd7 17.h4 Tc8 18.Th3 Tc6 19.Kf4 Te6 20.Tf3 Te3 21.Kg5 Db8 22.Tf6 Th3 23.Tc6 Sgf6 24.Kh6 Th1 25.Kg7 Dh2 26.g3 Se5 27.Lg2 Kd7 28.Tc8 Ke6 29.Kf8... (2021-02-13)
James Malcom: And thus, another giant falls. (2021-02-13)
A.Buchanan: Did Unto find a fix? (2021-02-14)
Michel Caillaud: Unto published a correction of P0002554 in StrateGems (42,5 moves, january 2020), not C+ of course... (2021-02-14)
James Malcom: May you input it into PDB please, Michel? (2021-02-14)
James Malcom: Thanks for the email, Michel. Unto's correction can now be seen in the database: P1386520 (2021-02-15)
more ...
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Michel Caillaud: cooked (testing last moves with Jacobi 0.7.5 and constraints) :
16...Sd7 17.h4 Tc8 18.Th3 Tc6 19.Kf4 Te6 20.Tf3 Te3 21.Kg5 Db8 22.Tf6 Th3 23.Tc6 Sgf6 24.Kh6 Th1 25.Kg7 Dh2 26.g3 Se5 27.Lg2 Kd7 28.Tc8 Ke6 29.Kf8... (2021-02-13)
James Malcom: And thus, another giant falls. (2021-02-13)
A.Buchanan: Did Unto find a fix? (2021-02-14)
Michel Caillaud: Unto published a correction of P0002554 in StrateGems (42,5 moves, january 2020), not C+ of course... (2021-02-14)
James Malcom: May you input it into PDB please, Michel? (2021-02-14)
James Malcom: Thanks for the email, Michel. Unto's correction can now be seen in the database: P1386520 (2021-02-15)
more ...
comment
Keywords: Unique Proof Game, Capture-free, Move Length Record
Genre: Retro
FEN: 1KB1R1b1/pp2pp1n/1b4p1/2pp3p/P2N2RP/BP3PP1/Q1PPP2q/1Nrkr1n1
Reprints: H34 FIDE Album 1995-1997 2004
Input: Gerd Wilts, 1996-07-07
Last update: James Malcom, 2021-02-16 more...
Genre: Retro
FEN: 1KB1R1b1/pp2pp1n/1b4p1/2pp3p/P2N2RP/BP3PP1/Q1PPP2q/1Nrkr1n1
Reprints: H34 FIDE Album 1995-1997 2004
Input: Gerd Wilts, 1996-07-07
Last update: James Malcom, 2021-02-16 more...
4 - P0008667
Maryan Kerhuel
Didier Innocenti
2524 Phénix 51 04/1997
(9+15) cooked
BP in 15,0
Circe Assassin
Maryan Kerhuel
Didier Innocenti
2524 Phénix 51 04/1997
(9+15) cooked
BP in 15,0
Circe Assassin
paul: Cooked by: 1.h3 d5 2.Rh2 Bxh3(ph2) 3.Sxh3(Bc8) Bxh3 4.g4 a5 5.Bg2 Bxg4(pg2) 6.c4 a4 7.b4 e6 8.Bb2 Bxb4(pb2) 9.Sa3 Ra5 10.Qxa4(pa7) Qc8 11.QxKe8(Ke8) (suicide of wQ)b5 12.Sc2 dxc4(pc2) 13.a3 Bxe2(pe2) 14.Ra2 Bxa3(pa2) 15.Kd1 b4. (2010-06-19)
Arnold Beine: Here is something wrong. Either Paul's cook does not work, because 10.Qxa4(Pa7)+ is a check (10...Qc8??) or in the given condition "Rex inclusive" must be added. (2023-07-26)
paul: Right, Arnold. Anyway, the proof game is cooked: 1.a4 e6 2.Sa3 B×a3 3.b4 a5 4.Bb2 a×b4(b2) 5.Ra2 R×a4(a2) 6.e4 Ra5 etc, as in author's solution: 7.Ba6 b×a6(Bf1) 8.B×a6(a7) d5 9.B×c8(bBc8) Bb7 10.c4 Qc8 11.Qc2 d×c4(c2) 12.Se2 B×e4(e2) 13.h3 Bf5 14.Rh2 B×h3(h2) 15.Kd1 B×g2(g2). (2024-03-13)
comment
Arnold Beine: Here is something wrong. Either Paul's cook does not work, because 10.Qxa4(Pa7)+ is a check (10...Qc8??) or in the given condition "Rex inclusive" must be added. (2023-07-26)
paul: Right, Arnold. Anyway, the proof game is cooked: 1.a4 e6 2.Sa3 B×a3 3.b4 a5 4.Bb2 a×b4(b2) 5.Ra2 R×a4(a2) 6.e4 Ra5 etc, as in author's solution: 7.Ba6 b×a6(Bf1) 8.B×a6(a7) d5 9.B×c8(bBc8) Bb7 10.c4 Qc8 11.Qc2 d×c4(c2) 12.Se2 B×e4(e2) 13.h3 Bf5 14.Rh2 B×h3(h2) 15.Kd1 B×g2(g2). (2024-03-13)
comment
Keywords: Circe (Assassin), Unique Proof Game
Genre: Retro, Fairies
FEN: 1nq1k1nr/p1p2ppp/4p3/r7/1pp5/b7/PPPPPPPP/3K4
Input: Gerd Wilts, 1997-05-28
Last update: Mario Richter, 2013-09-01 more...
Genre: Retro, Fairies
FEN: 1nq1k1nr/p1p2ppp/4p3/r7/1pp5/b7/PPPPPPPP/3K4
Input: Gerd Wilts, 1997-05-28
Last update: Mario Richter, 2013-09-01 more...
1. g4 d6 2. Lh3 Dd7 3. Kf1 De6 4. De1 De3 5. fxe3 Kd7 6. Dh4 Kc6 7. Dh6 gxh6 8. Sf3 Lg7 9. Tg1 Ld4 10. Tg3 Sf6 11. Lg2 Tg8 12. Th3 Tg5 13. Th5 Te5 14. Tg5 Lf5 15. Tg8 Sbd7 16. Th8 Tg8 17. Ke1 Tg5 18. Ta8 Th5 19. g5 Sg8 20. g6 Tg5 21. Lf1 Tg1 22. g7 Th1 23. Sg1
Henrik Juel: This is one of the proof games that is solved faster by hand than by computer
The two captures are obvious, and the interchanged rooks make a guess like Th1-g1-g3-h3-h5-g5-g8-h8-a8 reasonable
Natch 3.1 got nowhere in an hour (2018-12-10)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 40 Sekunden.
Keine Lösung: BP 21.5, BP 22.0. (2023-02-26)
comment
The two captures are obvious, and the interchanged rooks make a guess like Th1-g1-g3-h3-h5-g5-g8-h8-a8 reasonable
Natch 3.1 got nowhere in an hour (2018-12-10)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 40 Sekunden.
Keine Lösung: BP 21.5, BP 22.0. (2023-02-26)
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Stelvio 1.0
FEN: R5n1/pppnppPp/2kp3p/4rb2/3b4/4P3/PPPPP2P/RNB1KBNr
Input: Gerd Wilts, 1998-06-26
Last update: Silvio Baier, 2023-03-02 more...
Genre: Retro
Computer test: Stelvio 1.0
FEN: R5n1/pppnppPp/2kp3p/4rb2/3b4/4P3/PPPPP2P/RNB1KBNr
Input: Gerd Wilts, 1998-06-26
Last update: Silvio Baier, 2023-03-02 more...
1. g3 h5 2. Lh3 Th6 3. Kf1 Te6 4. Kg2 f6 5. Kf3 Te3+ 6. Kf4 e5+ 7. Kf5 Lb4 8. Kg6 De7 9. Kh7 Dc5 10. Kxg8 d6 11. Kxg7 Lg4 12. Kg6 Lf3 13. exf3 Te1 14. Se2 Tg1 15. Kf5 Tg2 16. Te1 a5 17. Sg1 a4 18. Te3 Ta5 19. Tb3 axb3 20. Ke4 bxa2 21. Kd3 e4+ 22. Ke2 e3 23. Ke1
paul: Sol.: 1.g3 h5 2.Bh3 Rh6 3.Kf1 Re6 4.Kg2 f6 5.Kf3 Re3+ 6.Kf4 e5+ 7.Kf5 Bb4 8.Kg6 Qe7 9.Kh7 Qc5 10.Kxg8 d6 11.Kxg7 Bg4 12.Kg6 Bf3 13.exf3 Re1 14.Se2 Rg1 15.Kf5 Rg2 16.Re1 a5 17.Sg1 a4 18.Re3 Ra5 19.Rb3 axb3 20.Ke4 bxa2 21.Kd3 e4+ 22.Ke2 e3 23.Ke1 (Ra4 is in a5)
The King captures an officer on its place and return.
For comparison, see P1013070 and P1007320 (2008-04-25)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 09:10:17 Stunden.
Keine Lösung: BP 21.5, BP 22.0, Prüfzeit 02:01:51 Stunden. (2023-02-17)
Reto: A good example of Stelvio's progress: Stelvio 1.5 only needs 40min on my notebook. (2023-08-19)
comment
The King captures an officer on its place and return.
For comparison, see P1013070 and P1007320 (2008-04-25)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 09:10:17 Stunden.
Keine Lösung: BP 21.5, BP 22.0, Prüfzeit 02:01:51 Stunden. (2023-02-17)
Reto: A good example of Stelvio's progress: Stelvio 1.5 only needs 40min on my notebook. (2023-08-19)
comment
Keywords: Unique Proof Game, Round Trip (K)
Genre: Retro
Computer test: Stelvio 1.0
FEN: 1n2k3/1pp5/3p1p2/r1q4p/1b6/4pPPB/pPPP1PrP/RNBQK1N1
Reprints: 2799v Phénix 146 12/2005
Input: Gerd Wilts, 1999-02-27
Last update: Silvio Baier, 2023-03-02 more...
Genre: Retro
Computer test: Stelvio 1.0
FEN: 1n2k3/1pp5/3p1p2/r1q4p/1b6/4pPPB/pPPP1PrP/RNBQK1N1
Reprints: 2799v Phénix 146 12/2005
Input: Gerd Wilts, 1999-02-27
Last update: Silvio Baier, 2023-03-02 more...
1. h4 g5 2. hxg5 e5 3. Txh7 Df6 4. Txf7 Th3 5. g4 Te3 6. dxe3 Lb4+ 7. Ld2 d6 8. Lc3 Le6 9. Dd4 Lxa2 10. Sd2 Ld5 11. Txa7 Lf3 12. exf3 Se7 13. Ld3 Kd7 14. Kf1 Kc6 15. Kg2 Sd7 16. Kg3 Th8 17. Ta8 Th1 18. Sh3 Ta1 19. Tc8 Ta8
Keywords: Unique Proof Game, Pure Round Trip (t)
Genre: Retro
Computer test: Resolution time : 54.34 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: r1R5/1ppnnR2/2kp1q2/4p1P1/1b1Q2P1/2BBPPKN/1PPN1P2/8
Reprints: 2 64 Proof Games 2012
Input: Gerd Wilts, 1999-02-27
Last update: Gerd Wilts, 2012-12-23 more...
Genre: Retro
Computer test: Resolution time : 54.34 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: r1R5/1ppnnR2/2kp1q2/4p1P1/1b1Q2P1/2BBPPKN/1PPN1P2/8
Reprints: 2 64 Proof Games 2012
Input: Gerd Wilts, 1999-02-27
Last update: Gerd Wilts, 2012-12-23 more...
1. c4 e6 2. Db3 Ke7 3. Db6 axb6 4. d4 Ta3 5. Lh6 Th3 6. gxh3 Kd6 7. Lg2 Se7 8. Lc6 dxc6 9. d5 Kc5 10. dxc6 Kb4 11. cxb7 c5 12. a4 Sec6 13. Ta3 De7 14. Tb3+ Kxb3 15. Lc1 Kf2
Überraschendes Tempoverlustmanöver Lc1-h6-Lc1.
Überraschendes Tempoverlustmanöver Lc1-h6-Lc1.
Keywords: Unique Proof Game, Tempo Loss
Genre: Retro
Computer test: Resolution time : 19.56 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: 1nb2b1r/1P2qppp/1pn1p3/2p5/P1P5/7P/1Pk1PP1P/1NB1K1NR
Input: Gerd Wilts, 2002-04-05
Last update: Gerd Wilts, 2005-12-26 more...
Genre: Retro
Computer test: Resolution time : 19.56 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: 1nb2b1r/1P2qppp/1pn1p3/2p5/P1P5/7P/1Pk1PP1P/1NB1K1NR
Input: Gerd Wilts, 2002-04-05
Last update: Gerd Wilts, 2005-12-26 more...
1. h4 Sf6 2. Th3 Sd5 3. Tc3 f6 4. Tc5 Kf7 5. c4 Ke6 6. Dc2 Ke5 7. Df5+ Kd4 8. d3 a5 9. Lf4 Ta6 10. Sd2 Te6 11. Ld6 Sb4 12. f4 S4c6 13. Kf2 Se5 14. Kg3 Sf7 15. Kg4 Sh6+ 16. Kh5 Sg8 17. g4 h6 18. Kg6 Ke3 19. h5 Kf2 20. Sh3+ Kg3 21. Sf2 Kh4 22. Sh1 De8+
8zügiger Rundlauf des sSg8 zwecks Schachschutz auf d5.
8zügiger Rundlauf des sSg8 zwecks Schachschutz auf d5.
Keywords: Unique Proof Game, Pure Round Trip (s), Check Protection, Capture-free
Genre: Retro
Computer test: Computerprüfung: C+ Stevio 1.0 34 Sekunden. Keine Lösung: BP 21.0, BP 21.5.
FEN: 1nb1qbnr/1pppp1p1/3BrpKp/p1R2Q1P/2P2PPk/3P4/PP1NP3/R4B1N
Input: Gerd Wilts, 2004-03-13
Last update: A.Buchanan, 2023-03-13 more...
Genre: Retro
Computer test: Computerprüfung: C+ Stevio 1.0 34 Sekunden. Keine Lösung: BP 21.0, BP 21.5.
FEN: 1nb1qbnr/1pppp1p1/3BrpKp/p1R2Q1P/2P2PPk/3P4/PP1NP3/R4B1N
Input: Gerd Wilts, 2004-03-13
Last update: A.Buchanan, 2023-03-13 more...
1. b4 d5 2. La3 Kd7 3. Dc1 Kc6 4. Db2 Kb5 5. Dxg7 Ka4 6. Sc3+ Kxa3 7. Tc1 Kb2 8. Sb1+ Kxc1 9. Da1 Lh6 10. f4 Lxf4 11. Kf2 Le3+ 12. Kg3 Kd1 13. Kh4 Ke1 14. Kh5 Kxf1 15. Sf3+ Kf2 16. Td1 d4 17. Se1 Kg1 18. Sc3 Kh1 19. Sd3+ Lg1
Cook: Zugumstellung
10. f4 d4 11. Kf2 Kd1 12. Kg3 Ke1 13. Kh4 Kxf1 14. Sf3+ Kf2 15. Td1 Lxf4 16. Se1 Kg1 17. Kh5 Kh1 18. Sc3 Le3 19. Sd3+ Lg1 (SH)
Cook: Zugumstellung
10. f4 d4 11. Kf2 Kd1 12. Kg3 Ke1 13. Kh4 Kxf1 14. Sf3+ Kf2 15. Td1 Lxf4 16. Se1 Kg1 17. Kh5 Kh1 18. Sc3 Le3 19. Sd3+ Lg1 (SH)
SH: cooked? 1. b4 d5 2. Ba3 Kd7 3. Qc1 Kc6 4. Qb2 Kb5 5. Qxg7 Ka4 6. Nc3+ Kxa3 7. Rc1 Kb2 8. Nb1+ Kxc1 9. Qa1 Bh6 10. f4 d4 11. Kf2 Kd1 12. Kg3 Ke1 13. Kh4 Kxf1 14. Nf3+ Kf2 15. Rd1 Bxf4 16. Ne1 Kg1 17. Kh5 Kh1 18. Nc3 Be3 19. Nd3+ Bg1 (2006-06-06)
Henrik Juel: Yes, the move order is not unique after 10.f4, so the problem is indeed cooked (2018-12-17)
more ...
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Henrik Juel: Yes, the move order is not unique after 10.f4, so the problem is indeed cooked (2018-12-17)
more ...
comment
Keywords: Unique Proof Game, Promenade (k)
Genre: Retro
Computer test: Computerprüfung: C- oder cooked Stelvio 1.4 48 Sekunden. Keine Lösung: BP 18.5.
FEN: rnbq2nr/ppp1pp1p/8/7K/1P1p4/2NN4/P1PPP1PP/Q2R2bk
Input: Gerd Wilts, 2004-03-13
Last update: Silvio Baier, 2023-08-15 more...
Genre: Retro
Computer test: Computerprüfung: C- oder cooked Stelvio 1.4 48 Sekunden. Keine Lösung: BP 18.5.
FEN: rnbq2nr/ppp1pp1p/8/7K/1P1p4/2NN4/P1PPP1PP/Q2R2bk
Input: Gerd Wilts, 2004-03-13
Last update: Silvio Baier, 2023-08-15 more...
1. Sf3 2. Sd4 3. f3 4. Kf2 5. Kg3 6. Kh4 7. g3 8. Lh3 9. Le6 10. Sf5 11. d4 12. Ld2 13. La5 14. Sc3 15. Db1 16. Td1 17. Td3 18. Sd1 19. Tb3 20. Tb6 21. b4 22. b5 23. Db4 24. Tb1 25. Tb3 26. Tc3 27. Tcc6 28. c4 29. c5 30. Lc4 31. d5
Längste eindeutige Serienzug-BP ohne Schläge
Längste eindeutige Serienzug-BP ohne Schläge
Cf: P1347359
paul: Checked with stip ser-dia 31 forsyt rsbqkbsr/pppppppp/1RR5/BPPP1S2/1QB4K/5PP1/P3P2P/3S4 by Jacobi. (2021-09-27)
comment
paul: Checked with stip ser-dia 31 forsyt rsbqkbsr/pppppppp/1RR5/BPPP1S2/1QB4K/5PP1/P3P2P/3S4 by Jacobi. (2021-09-27)
comment
Keywords: Unique Proof Game, Seriesmover, Capture-free, Move Length Record (ex-aequo)
Genre: Retro, Fairies
FEN: 8/8/1RR5/BPPP1N2/1QB4K/5PP1/P3P2P/3N4
Reprints: H54 Vkontakte 2013
H54 Phénix 261/262, p. 10359, 05-06/2016
Phénix 279-280, p. 11000, 11-12/2017
Input: Gerd Wilts, 2004-08-01
Last update: A.Buchanan, 2021-04-09 more...
Genre: Retro, Fairies
FEN: 8/8/1RR5/BPPP1N2/1QB4K/5PP1/P3P2P/3N4
Reprints: H54 Vkontakte 2013
H54 Phénix 261/262, p. 10359, 05-06/2016
Phénix 279-280, p. 11000, 11-12/2017
Input: Gerd Wilts, 2004-08-01
Last update: A.Buchanan, 2021-04-09 more...
12 - P1066732
Eric Pichouron
PCCC Meeting 09/2004
3. ehrende Erwähnung Champagne TT 2004
(12+14) C+
BP in 24,5
Eric Pichouron
PCCC Meeting 09/2004
3. ehrende Erwähnung Champagne TT 2004
(12+14) C+
BP in 24,5
1. e4 h5 2. Dg4 hxg4 3. Sc3 Th3 4. Sd5 Tc3 5. bxc3 Sc6 6. La3 Sd4 7. Ld6 cxd6 8. h4 Da5 9. h5 b6 10. h6 Lb7 11. h7 0-0-0 12. Th6 La8 13. Tf6 gxf6 14. Lc4 Lh6 15. d3 Lc1 16. Se2 La3 17. Kd2 Lb4 18. Th1 Da3 19. Th5 a5 20. Te5 fxe5 21. h8=D Sf6 22. Dh1 Th8 23. Dd1 Th3 24. Ke1 Tf3 25. gxf3
Richter MC: "A well oiled game using the 'standard Rook' to double the theme, displaying an additional Pronkin and switchback by Ke1."
Richter MC: "A well oiled game using the 'standard Rook' to double the theme, displaying an additional Pronkin and switchback by Ke1."
Henrik Juel: Natch 3.1 did little in half an hour (2018-12-19)
Moldenhauer: Computerprüfung: C+ Stelvio 1.2 02:04:15 Stunden. (hh:mm:ss)
Keine Lösung: BP 23.5, BP 24.0. (2023-05-11)
comment
Moldenhauer: Computerprüfung: C+ Stelvio 1.2 02:04:15 Stunden. (hh:mm:ss)
Keine Lösung: BP 23.5, BP 24.0. (2023-05-11)
comment
Keywords: Unique Proof Game, Pronkin Theme (D), Switchback, Impostor (Tt)
Genre: Retro
Computer test: Stelvio 1.2
FEN: b1k5/3ppp2/1p1p1n2/p2Np3/1bBnP1p1/q1PP1P2/P1P1NP2/3QK3
Reprints: H58 Phénix 02-03/2005
Input: Gerd Wilts, 2004-09-14
Last update: Silvio Baier, 2023-08-15 more...
Genre: Retro
Computer test: Stelvio 1.2
FEN: b1k5/3ppp2/1p1p1n2/p2Np3/1bBnP1p1/q1PP1P2/P1P1NP2/3QK3
Reprints: H58 Phénix 02-03/2005
Input: Gerd Wilts, 2004-09-14
Last update: Silvio Baier, 2023-08-15 more...
1. c4 Sf6 2. Db3 Se4 3. Db6 axb6 4. c5 Ta3 5. c6 bxc6 6. d4 La6 7. Lf4 Sd2 8. e4 Le2 9. Ld6 Td3 10. a4 cxd6 11. a5 bxa5 12. h4 Db6 13. h5 Db3 14. h6 gxh6 15. Th5 Lg7 16. Tb5 cxb5 17. d5 Ld4 18. Sh3 f6 19. Sf4 Kf7 20. Se6 Tc8 21. f4 Tc2 22. Sc5 dxc5
Keywords: Unique Proof Game
Genre: Retro
Computer test: KP: C+ Fully tested with Stelvio 1.0 (on two computers) in combined time of approximately 667 hours. Reto: And also with Stelvio 1.62 in about 5 hours.
FEN: 1n6/3ppk1p/5p1p/pppP4/3bPP2/1q1r4/1Prnb1P1/RN2KB2
Input: Gerd Wilts, 2004-09-30
Last update: Reto, 2023-09-11 more...
Genre: Retro
Computer test: KP: C+ Fully tested with Stelvio 1.0 (on two computers) in combined time of approximately 667 hours. Reto: And also with Stelvio 1.62 in about 5 hours.
FEN: 1n6/3ppk1p/5p1p/pppP4/3bPP2/1q1r4/1Prnb1P1/RN2KB2
Input: Gerd Wilts, 2004-09-30
Last update: Reto, 2023-09-11 more...
1. b4 g5 2. b5 g4 3. b6 g3 4. bxc7 b5 5. c4 Lb7 6. Sc3 Lf3 7. gxf3 b4 8. Lh3 b3 9. Lf5 b2 10. Lc2 b1=S 11. d3 Sd2 12. Sh3 Sf1 13. Dd2 g2 14. Dh6 g1=D 15. Ld2 Dg5 16. Tc1 Se3 17. Lb1 Sg4 18. 0-0 Df4 19. Tfd1 Se3 20. Le1 Sf1 21. Kxf1 Dd2 22. Txd2
Zuerst schirmt der schwarze UWS auf f1 die schwarze UWD auf g1 ab, anschließend schirmt der Springer die Dame auf g4 ab, und schließlich werden beide geschlagen.
Cook: 1. b4 Sf6 2. c4 b6 3. Sc3 c5 4. bxc5 Lb7 5. cxb6 Lf3 6. gxf3 Sd5 7. Lh3 Se3 8. Lf5 Sf1 9. Lc2 g5 10. Sh3 g4 11. d3 g3 12. Dd2 g2 13. Dh6 g1=D 14. Ld2 Dg3 15. Tc1 Se3 16. Lb1 Dgc7 17. bxc7 Sd1 18. 0-0 Se3 19. Tfd1 Sd5 20. Kf1 Sf6 21. Le1 Sg8 22. Td2
Zuerst schirmt der schwarze UWS auf f1 die schwarze UWD auf g1 ab, anschließend schirmt der Springer die Dame auf g4 ab, und schließlich werden beide geschlagen.
Cook: 1. b4 Sf6 2. c4 b6 3. Sc3 c5 4. bxc5 Lb7 5. cxb6 Lf3 6. gxf3 Sd5 7. Lh3 Se3 8. Lf5 Sf1 9. Lc2 g5 10. Sh3 g4 11. d3 g3 12. Dd2 g2 13. Dh6 g1=D 14. Ld2 Dg3 15. Tc1 Se3 16. Lb1 Dgc7 17. bxc7 Sd1 18. 0-0 Se3 19. Tfd1 Sd5 20. Kf1 Sf6 21. Le1 Sg8 22. Td2
Henrik Juel: Natch 3.1 did not even find the solution in an hour (2018-12-15)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.2 296:36:23 Stunden. (hh:mm:ss)
Keine Lösung BP 20.5, BP 21.0. Histogramm 355767/10739k
Cooked bei 59917/922k. Die letzten 295850 Strategien wären sicher
schneller geprüft worden da die meisten großen Werte bereits waren.
Notations Beispiel: 1.b4 Sf6 2.c4 b6 3.Sc3 c5 4.bxc5 Lb7 5.cxb6 Lf3
6.gxf3 Sd5 7.Lh3 Se3 8.Lf5 Sf1 9.Lc2 g5 10.Sh3 g4 11.d3 g3 12.Dd2 g2
13.Dh6 g1D 14.Ld2 Dg3 15.Tc1 Se3 16.Lb1 Dgc7 17.bxc7 Sd1 18.0–0 Se3
19.Tfd1 Sd5 20.Kf1 Sf6 21.Le1 Sg8 22.Td2
oder wie vor bis 19. dann 20.Le1 Sf6 21.Kf1 Sg8 22.Td2 (2023-05-24)
comment
Moldenhauer: Computerprüfung: Cooked Stelvio 1.2 296:36:23 Stunden. (hh:mm:ss)
Keine Lösung BP 20.5, BP 21.0. Histogramm 355767/10739k
Cooked bei 59917/922k. Die letzten 295850 Strategien wären sicher
schneller geprüft worden da die meisten großen Werte bereits waren.
Notations Beispiel: 1.b4 Sf6 2.c4 b6 3.Sc3 c5 4.bxc5 Lb7 5.cxb6 Lf3
6.gxf3 Sd5 7.Lh3 Se3 8.Lf5 Sf1 9.Lc2 g5 10.Sh3 g4 11.d3 g3 12.Dd2 g2
13.Dh6 g1D 14.Ld2 Dg3 15.Tc1 Se3 16.Lb1 Dgc7 17.bxc7 Sd1 18.0–0 Se3
19.Tfd1 Sd5 20.Kf1 Sf6 21.Le1 Sg8 22.Td2
oder wie vor bis 19. dann 20.Le1 Sf6 21.Kf1 Sg8 22.Td2 (2023-05-24)
comment
Keywords: Ceriani-Frolkin Theme (ds), Unique Proof Game, Castling, Promotion (sd), Homebase
Genre: Retro
FEN: rn1qkbnr/p1Pppp1p/7Q/8/2P5/2NP1P1N/P2RPP1P/1BR1BK2
Reprints: feenschach 161 09-11/2005
Input: Gerd Wilts, 2004-10-03
Last update: Silvio Baier, 2023-08-15 more...
Genre: Retro
FEN: rn1qkbnr/p1Pppp1p/7Q/8/2P5/2NP1P1N/P2RPP1P/1BR1BK2
Reprints: feenschach 161 09-11/2005
Input: Gerd Wilts, 2004-10-03
Last update: Silvio Baier, 2023-08-15 more...
1. b4 a5 2. bxa5 Txa5 3. [+wBa7] Te5 4. a8=L d5 5. Lxb7 Kd7 6. [+wBa7] Ke6 7. a8=S Kf5 8. Sxc7 Le6 9. [+wBd7] Dc8 10. d8=T g6 11. Txd5 Lg7 12. [+wBd7] Lf6 13. d8=D Sd7 14. Dxe7 Sf8 15. [+wBb2] [+sBd7]
James Malcom: I wonder if the newly placed wBb2 and sBd7 could be considered as imposters. (2021-06-27)
A.Buchanan: I think they are. This is not so hard a problem to solve. (2021-06-28)
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A.Buchanan: I think they are. This is not so hard a problem to solve. (2021-06-28)
more ...
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Keywords: Allumwandlung, Crazyhouse, Unique Proof Game, Promotion (x4 LSTD), Non-standard material (DTLS), Impostor (Bb)
Genre: Retro, Fairies
FEN: 2q2nnr/1BNpQp1p/4bbp1/3Rrk2/8/8/PPPPPPPP/RNBQKBNR
Reprints: feenschach 154 2004
H46 Phénix 02-03/2005
Input: Gerd Wilts, 2005-01-09
Last update: A.Buchanan, 2021-06-28 more...
Genre: Retro, Fairies
FEN: 2q2nnr/1BNpQp1p/4bbp1/3Rrk2/8/8/PPPPPPPP/RNBQKBNR
Reprints: feenschach 154 2004
H46 Phénix 02-03/2005
Input: Gerd Wilts, 2005-01-09
Last update: A.Buchanan, 2021-06-28 more...
1. d4[-wTa1,-wTh1,-sTa8,-sTh8,-wBa2,-wSb1,-wSg1,-wBh2,-sBa7,-sSb8,-sSg8,-sBh7] g5 2. e4[-wBe4] g4 3. Le2[-wBg2] g3 4. Lf3 g2 5. Ke2 g1=T 6. d5 Lg7 7. d6 Kf8[-sDd8,-sLc8,-sBd7] 8. d7[-sBc7] Th1 9. d8=S Th8 10. Se6+ Ke8
Cook: 1. Sf3 [-wTa1h1, -wSb1, -wBa2a7 -sBh7, -sTa8h8, -sSb8g8] g5 2. e4 [-wLe4] d5 3. d4 g4 4. Lc4 [-wBg2] g3 5. Lxd5 gxh2 6. Ke2 h1=T 7. Sg5 c5 8. dxc5 [-Bc5] Da5 [-Da5, -Lc8] 9. Se6 Lg7 10. Lf3 Th8
Cook: 1. Sf3 [-wTa1h1, -wSb1, -wBa2a7 -sBh7, -sTa8h8, -sSb8g8] g5 2. e4 [-wLe4] d5 3. d4 g4 4. Lc4 [-wBg2] g3 5. Lxd5 gxh2 6. Ke2 h1=T 7. Sg5 c5 8. dxc5 [-Bc5] Da5 [-Da5, -Lc8] 9. Se6 Lg7 10. Lf3 Th8
Keywords: Berkeley Chess, Unique Proof Game
Genre: Retro, Fairies
FEN: 4k2r/1p2ppb1/4N3/8/8/5B2/1PP1KP2/2BQ4
Input: Gerd Wilts, 2005-10-19
Last update: A.Buchanan, 2024-03-15 more...
Genre: Retro, Fairies
FEN: 4k2r/1p2ppb1/4N3/8/8/5B2/1PP1KP2/2BQ4
Input: Gerd Wilts, 2005-10-19
Last update: A.Buchanan, 2024-03-15 more...
1. f3 c6 2. Kf2 Da5 3. Kg3 Dc3 4. dxc3 h5 5. Dd6 h4+ 6. Kg4 h3 7. Dc7 hxg2 8. Sh3 g1=D 9. Lg2 Db6 10. Dxc8+ Dd8 11. Dc7 Th5 12. Dg3 Db6 13. Td1 Dg1 14. Td6 Td5 15. Le3 g5 16. Sd2 Dxa1 17. Lc5 Dg1 18. La3 Db6 19. De1 Td4+ 20. cxd4 Dd8
Henrik Juel: d2xDc3xTd4 was too tricky for Natch 3.1, which did not find the solution in half an hour
Stopped at pos. 917 (2018-12-22)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 00:08:50 Minuten.
Keine Lösung: BP 19.0, BP 19.5. (2023-03-01)
more ...
comment
Stopped at pos. 917 (2018-12-22)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 00:08:50 Minuten.
Keine Lösung: BP 19.0, BP 19.5. (2023-03-01)
more ...
comment
Keywords: Unique Proof Game, Pronkin Theme (d), Promotion (d)
Genre: Retro
Computer test: Stelvio 1.0
FEN: rn1qkbn1/pp1ppp2/2pR4/6p1/3P2K1/B4P1N/PPPNP1BP/4Q3
Reprints: (6) StrateGems 10-12/2007
Input: Gerd Wilts, 2006-01-22
Last update: Silvio Baier, 2023-03-02 more...
Genre: Retro
Computer test: Stelvio 1.0
FEN: rn1qkbn1/pp1ppp2/2pR4/6p1/3P2K1/B4P1N/PPPNP1BP/4Q3
Reprints: (6) StrateGems 10-12/2007
Input: Gerd Wilts, 2006-01-22
Last update: Silvio Baier, 2023-03-02 more...
18 - P1068230
Philippe Leroy
4922 Phénix 142 07-08/2005
Pascal Wassong gewidmet
(13+16) C+
BP in 25,5
Philippe Leroy
4922 Phénix 142 07-08/2005
Pascal Wassong gewidmet
(13+16) C+
BP in 25,5
1. e3 h5 2. Lb5 Sh6 3. Lc6 dxc6 4. a4 Dd3 5. Ta3 Dh7 6. Td3 Lg4 7. Td6 f5 8. Tf6 exf6 9. e4 Lb4 10. e5 0-0 11. e6 Td8 12. e7 Td3 13. e8=L Tc3 14. d4 b5 15. d5 bxa4 16. d6 a3 17. d7 a2 18. d8=T a1=D 19. Td7 Da6 20. Tf7 Dd3 21. Ld7 a5 22. Le6 Sa6 23. La2 Td8 24. Te7+ Td5 25. Te6 Tdc5 26. Te8#
Henrik Juel: Natch 3.1 did little in more than an hour
Stopped at position 1 (2018-12-22)
Moldenhauer: Computerprüfung: C+ Stevio 1.0 7:08:52 Stunden.
Keine Lösung: BP 24.5, BP 25.0. (2023-02-14)
more ...
comment
Stopped at position 1 (2018-12-22)
Moldenhauer: Computerprüfung: C+ Stevio 1.0 7:08:52 Stunden.
Keine Lösung: BP 24.5, BP 25.0. (2023-02-14)
more ...
comment
Keywords: Unique Proof Game, Non-standard material (d), Promotion (LTd), Phoenix (TL)
Genre: Retro
Computer test: Stelvio 2.0 in 12min
FEN: 4R1k1/2p3pq/n1p2p1n/p1r2p1p/1b4b1/2rq4/BPP2PPP/1NBQK1NR
Input: Gerd Wilts, 2006-01-22
Last update: Reto, 2023-12-19 more...
Genre: Retro
Computer test: Stelvio 2.0 in 12min
FEN: 4R1k1/2p3pq/n1p2p1n/p1r2p1p/1b4b1/2rq4/BPP2PPP/1NBQK1NR
Input: Gerd Wilts, 2006-01-22
Last update: Reto, 2023-12-19 more...
1. a3 e5 2. Ta2 Lb4 3. axb4 h5 4. Ta3 h4 5. Tg3 hxg3 6. hxg3 f5 7. Th3 f4 8. gxf4 a5 9. Ta3 Th1 10. Sf3 Txf1+ 11. Kxf1 Ta6 12. Kg1 Tg6 13. Kh2 d6 14. Dh1 Lg4 15. Kg3 Sf6 16. Dh7 Th6 17. Ta1 Th1 18. Sa3 Txc1 19. Kh4 Th1+ 20. Kg5 Th3 21. Th1 Tg3 22. Dh3 e4 23. Sh4 Lc8+
Cook: 1. Sa3 a5 2. Sb5 e5 3. a3 Lb4 4. axb4 h5 5. Ta3 h4 6. Tg3 hxg3 7. hxg3 Ta6 8. Th7 Th6 9. Sf3 Th1 10. Th2 Txf1+ 11. Kxf1 Th3 12. Kg1 e4 13. Th1 f5 14. Sh4 f4 15. gxf4 Ta3 16. Kh2 Ta1 17. Kg3 Txc1 18. Kg4 Ta1 19. Dg1 Ta3 20. Dh2 Tb3 21. Sa3 Sf6+ 22. Kg5 d6 23. Dh3 Tg3+
Cook: 1. Sa3 a5 2. Sb5 e5 3. a3 Lb4 4. axb4 h5 5. Ta3 h4 6. Tg3 hxg3 7. hxg3 Ta6 8. Th7 Th6 9. Sf3 Th1 10. Th2 Txf1+ 11. Kxf1 Th3 12. Kg1 e4 13. Th1 f5 14. Sh4 f4 15. gxf4 Ta3 16. Kh2 Ta1 17. Kg3 Txc1 18. Kg4 Ta1 19. Dg1 Ta3 20. Dh2 Tb3 21. Sa3 Sf6+ 22. Kg5 d6 23. Dh3 Tg3+
Henrik Juel: Natch 3.1 did not find the solution in half an hour
Stopped at pos. 4961 (2018-12-22)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.11 14:12:45 Stunden. (hh:mm:ss)
Keine Lösung: BP22.0, BP 22.5.
Beispiel: 1.Sa3 a5 2.Sb5 e5 3.a3 Lb4 4.axb4 h5 5.Ta3 h4 6.Tg3 hxg3 7.hxg3 Ta6
8.Th7 Th6 9.Sf3 Th1 10.Th2 Txf1+ 11.Kxf1 Th3 12.Kg1 e4 13.Th1 f5
14.Sh4 f4 15.gxf4 Ta3 16.Kh2 Ta1 17.Kg3 Txc1 18.Kg4 Ta1 19.Dg1 Ta3
20.Dh2 Tb3 21.Sa3 Sf6+ 22.Kg5 d6 23.Dh3 Tg3+ (2023-03-28)
more ...
comment
Stopped at pos. 4961 (2018-12-22)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.11 14:12:45 Stunden. (hh:mm:ss)
Keine Lösung: BP22.0, BP 22.5.
Beispiel: 1.Sa3 a5 2.Sb5 e5 3.a3 Lb4 4.axb4 h5 5.Ta3 h4 6.Tg3 hxg3 7.hxg3 Ta6
8.Th7 Th6 9.Sf3 Th1 10.Th2 Txf1+ 11.Kxf1 Th3 12.Kg1 e4 13.Th1 f5
14.Sh4 f4 15.gxf4 Ta3 16.Kh2 Ta1 17.Kg3 Txc1 18.Kg4 Ta1 19.Dg1 Ta3
20.Dh2 Tb3 21.Sa3 Sf6+ 22.Kg5 d6 23.Dh3 Tg3+ (2023-03-28)
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Keywords: Unique Proof Game, Pure Round Trip (T)
Genre: Retro
FEN: 1nbqk3/1pp3p1/3p1n2/p5K1/1P2pP1N/N5rQ/1PPPPPP1/7R
Input: Gerd Wilts, 2006-08-14
Last update: Silvio Baier, 2023-04-05 more...
Genre: Retro
FEN: 1nbqk3/1pp3p1/3p1n2/p5K1/1P2pP1N/N5rQ/1PPPPPP1/7R
Input: Gerd Wilts, 2006-08-14
Last update: Silvio Baier, 2023-04-05 more...
20 - P1068639
Roberto Osorio
Jorge Joaquin Lois
1961 Orbit 32 10/2006
Nicolas Dupont gewidmet
3rd Prize
(15+13) C+
BP in 20,0
Roberto Osorio
Jorge Joaquin Lois
1961 Orbit 32 10/2006
Nicolas Dupont gewidmet
3rd Prize
(15+13) C+
BP in 20,0
1. Sc3 Sc6 2. Sd5 Tb8 3. Sxe7 Kxe7 4. a4 Kf6 5. a5 Kg6 6. a6 Dh4 7. axb7 Sf6 8. bxc8=S Tb3 9. h3 Lb4 10. Sd6 Te8 11. Sf5 Tee3 12. Sg3 Se5 13. f4 Tf3 14. e4 Tf2 15. S1e2 Tbf3 16. Sc3 c6 17. d3 Td2 18. Sb1 Tff2 19. Se2 Kh5 20. Sg1+ Tfe2#
Henrik Juel: Sb1 is actually [Sg1], and Sg1 is [Pa2] promoted on c8.
Testing with Euclide ran out of time. (2011-02-27)
paul: The first 19 moves checked by Euclide in half a day. (2020-12-02)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 01:04:22 Stunde. (hh:mm:ss)
Keine Lösung: BP 19.0, BP 19.5. (2023-03-02)
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Testing with Euclide ran out of time. (2011-02-27)
paul: The first 19 moves checked by Euclide in half a day. (2020-12-02)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 01:04:22 Stunde. (hh:mm:ss)
Keine Lösung: BP 19.0, BP 19.5. (2023-03-02)
more ...
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Keywords: Unique Proof Game, Interchange
Genre: Retro
Computer test: Stelvio 1.0
FEN: 8/p2p1ppp/2p2n2/4n2k/1b2PP1q/3P3P/1PPrr1P1/RNBQKBNR
Reprints: H30 Vkontakte 2013
H30 Phénix 261/262, p. 10353, 05-06/2016
Input: Gerd Wilts, 2006-12-05
Last update: Silvio Baier, 2023-03-03 more...
Genre: Retro
Computer test: Stelvio 1.0
FEN: 8/p2p1ppp/2p2n2/4n2k/1b2PP1q/3P3P/1PPrr1P1/RNBQKBNR
Reprints: H30 Vkontakte 2013
H30 Phénix 261/262, p. 10353, 05-06/2016
Input: Gerd Wilts, 2006-12-05
Last update: Silvio Baier, 2023-03-03 more...
1. e3 h5 2. Ld3 Th6 3. Lh7 e5 4. d3 Dh4 5. Ld2 g5 6. La5 Lb4+ 7. Sc3 c5 8. Lc7 a5 9. g3 Taa6 10. f3 Tab6 11. Kf2 Sa6 12. Sd5 Ld2 13. Se7 d5 14. Sh3 Lxh3 15. c3 Lf5 16. h3 Lg6 17. Th2 f5 18. Da4+ Kf7 19. Dc6 Tb3 20. axb3 Db4 21. Ta4 Da3 22. bxa3 b5
Henrik Juel: Natch 3.1 did little in more than half an hour
Stopped at pos. 15 (2018-12-22)
Moldenhauer: Computerprüfung: Stelvio 1.0 20:35:18 Stunden. (hh:mm:ss)
Keine Lösung: BP 21.0, BP 21.5.
Notation: 1.e3 h5 2.Ld3 Th6 3.Lh7 e5 4. d3 Dh4 5.Ld2 g5 6.La5 Lb4+
7.Sc3 c5 8.Lc7 a5 9.g3 Taa6 10.f3 Tab6 11.Kf2 Sa6 12.Sd5 Ld2
13.Se7 d5 14.Sh3 Lxh3 15.c3 Lf5 16.h3 Lg6 17.Th2 f5
18.Da4+ Kf7 19.Dc6 Tb3 20.axb3 Db4 21.Ta4 Da3 22.bxa3 b5 (2023-03-10)
comment
Stopped at pos. 15 (2018-12-22)
Moldenhauer: Computerprüfung: Stelvio 1.0 20:35:18 Stunden. (hh:mm:ss)
Keine Lösung: BP 21.0, BP 21.5.
Notation: 1.e3 h5 2.Ld3 Th6 3.Lh7 e5 4. d3 Dh4 5.Ld2 g5 6.La5 Lb4+
7.Sc3 c5 8.Lc7 a5 9.g3 Taa6 10.f3 Tab6 11.Kf2 Sa6 12.Sd5 Ld2
13.Se7 d5 14.Sh3 Lxh3 15.c3 Lf5 16.h3 Lg6 17.Th2 f5
18.Da4+ Kf7 19.Dc6 Tb3 20.axb3 Db4 21.Ta4 Da3 22.bxa3 b5 (2023-03-10)
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Stelvio 1.0
FEN: 6n1/2B1Nk1B/n1Q3br/pppppppp/R7/PPPPPPPP/3b1K1R/8
Reprints: H35 Vkontakte 2013
H35 Phénix 261/262, p. 10354, 05-06/2016
Input: Gerd Wilts, 2007-01-02
Last update: Silvio Baier, 2023-03-20 more...
Genre: Retro
Computer test: Stelvio 1.0
FEN: 6n1/2B1Nk1B/n1Q3br/pppppppp/R7/PPPPPPPP/3b1K1R/8
Reprints: H35 Vkontakte 2013
H35 Phénix 261/262, p. 10354, 05-06/2016
Input: Gerd Wilts, 2007-01-02
Last update: Silvio Baier, 2023-03-20 more...
1. h4 c5 2. h5 c4 3. Th4 c3 4. Tc4 a6 5. Txc8 Sc6 6. Txa8 Db8 7. Ta7 Dg3 8. fxg3 d5 9. Kf2 d4 10. Kf3 d3 11. Kg4 dxc2 12. Kh4 cxb1=L 13. Db3 e5 14. Db6 e4 15. b3 e3 16. Lb2 exd2 17. e3 Lf5 18. Ld3 d1=T 19. Lc2 Td8 20. Td1 Ta8 21. La1 Lc8 22. Td7 Sb8
Ersatz der beiden auf ihren Ursprungsfeldern geschlagenen sTa8 und sLc8 durch Pronkin-Figuren.
Ersatz der beiden auf ihren Ursprungsfeldern geschlagenen sTa8 und sLc8 durch Pronkin-Figuren.
Reto: The 21.5 move paths leading to this position are known to me and they are not cooks in my eyes, as move parity is part of the position to find. Anyone who likes can think "exact spg" or similar if that helps them. (2023-03-13)
A.Buchanan: A number of different opinions exist. To me:
(1) a shorter PG, unique or not, does not cook a PG in x.y.
(2) This is true whether the delta is z.0 or z.5 moves.
(3) A composer may choose to include "exactly" in the stipulation, but if they choose not to then the composer's stipulation "Originalforderung" may not be fiddled with by later generations.
(4) However, there may be a "database stipulation" added by curators for uniformity within a catalogue, and if the database stipulation does not match the Originalforderung, then the Originalforderung must appear in an Originalforderung field, not just as a comment. [PDB does not support this feature.]
(5) Accidental shorter solutions do constitute a defect, in my view.
Again to say: this is just my personal opinion :) (2023-03-14)
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A.Buchanan: A number of different opinions exist. To me:
(1) a shorter PG, unique or not, does not cook a PG in x.y.
(2) This is true whether the delta is z.0 or z.5 moves.
(3) A composer may choose to include "exactly" in the stipulation, but if they choose not to then the composer's stipulation "Originalforderung" may not be fiddled with by later generations.
(4) However, there may be a "database stipulation" added by curators for uniformity within a catalogue, and if the database stipulation does not match the Originalforderung, then the Originalforderung must appear in an Originalforderung field, not just as a comment. [PDB does not support this feature.]
(5) Accidental shorter solutions do constitute a defect, in my view.
Again to say: this is just my personal opinion :) (2023-03-14)
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Keywords: Unique Proof Game, Pronkin Theme (tl)
Genre: Retro
Computer test: Solving time: Natch 3.3: >10h, Euclide 1.11: >10h, Stelvio 1.15: 33:30min
FEN: rnb1kbnr/Rp1R1ppp/pQ6/7P/7K/1Pp1P1P1/P1B3P1/B5N1
Reprints: H34 Vkontakte 2013
H34 Phénix 261/262, p. 10354, 2013
Input: Gerd Wilts, 2009-01-06
Last update: Reto, 2023-03-30 more...
Genre: Retro
Computer test: Solving time: Natch 3.3: >10h, Euclide 1.11: >10h, Stelvio 1.15: 33:30min
FEN: rnb1kbnr/Rp1R1ppp/pQ6/7P/7K/1Pp1P1P1/P1B3P1/B5N1
Reprints: H34 Vkontakte 2013
H34 Phénix 261/262, p. 10354, 2013
Input: Gerd Wilts, 2009-01-06
Last update: Reto, 2023-03-30 more...
1. h4 g5 2. hxg5 c5 3. Th6 c4 4. Tb6 axb6 5. Sc3 Ta3 6. Sb5 Te3 7. fxe3 c3 8.
dxc3 h5 9. Dd5 Th6 10. Ld2 Tf6 11. 0-0-0 Txf1 12. Le1 Tf4 13. Df3 f5 14. Td6 Td4
15. Tf6 exf6 16. Sa3 De7 17. Sb1 Da3 18. Ld2 Da8 19. a4 La3 20. Kd1 d6 21. Ke1
Kd7 22. Lc1
dxc3 h5 9. Dd5 Th6 10. Ld2 Tf6 11. 0-0-0 Txf1 12. Le1 Tf4 13. Df3 f5 14. Td6 Td4
15. Tf6 exf6 16. Sa3 De7 17. Sb1 Da3 18. Ld2 Da8 19. a4 La3 20. Kd1 d6 21. Ke1
Kd7 22. Lc1
Henrik Juel: Natch 3.1 did little in half an hour
Stopped at pos. 1 (2018-12-27)
paul: 1.h4 g5 2.hxg5 c5 3.Rh6 c4 4.Rb6 axb6 5.Sc3 Ra3 6.Sb5 Re3 7.fxe3 c3 8.dxc3 h5 9.Qd5 Rh6 10.Bd2 Rf6 11.O-O-O Rxf1 12.Be1 Rf4 13.Qf3 f5 14.Rd6 Rd4 15.Rf6 exf6 16.Sa3 Qe7 17.Sb1 Qa3 18.Bd2 Qa8 19.a4 Ba3 20.Kd1 d6 21.Ke1 Kd7 22.Bc1. Hidden white castling. (2020-12-01)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:25:05 Minuten. (hh:mm:ss)
Keine Lösung: BP 20.5, BP 21.0. (2023-03-12)
comment
Stopped at pos. 1 (2018-12-27)
paul: 1.h4 g5 2.hxg5 c5 3.Rh6 c4 4.Rb6 axb6 5.Sc3 Ra3 6.Sb5 Re3 7.fxe3 c3 8.dxc3 h5 9.Qd5 Rh6 10.Bd2 Rf6 11.O-O-O Rxf1 12.Be1 Rf4 13.Qf3 f5 14.Rd6 Rd4 15.Rf6 exf6 16.Sa3 Qe7 17.Sb1 Qa3 18.Bd2 Qa8 19.a4 Ba3 20.Kd1 d6 21.Ke1 Kd7 22.Bc1. Hidden white castling. (2020-12-01)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:25:05 Minuten. (hh:mm:ss)
Keine Lösung: BP 20.5, BP 21.0. (2023-03-12)
comment
Keywords: Unique Proof Game, Castling Paradox (wk hidden)
Genre: Retro
Computer test: Stelvio 1.11
FEN: qnb3n1/1p1k4/1p1p1p2/5pPp/P2r4/b1P1PQ2/1PP1P1P1/1NB1K1N1
Input: Gerd Wilts, 2010-01-31
Last update: Silvio Baier, 2023-03-20 more...
Genre: Retro
Computer test: Stelvio 1.11
FEN: qnb3n1/1p1k4/1p1p1p2/5pPp/P2r4/b1P1PQ2/1PP1P1P1/1NB1K1N1
Input: Gerd Wilts, 2010-01-31
Last update: Silvio Baier, 2023-03-20 more...
1. f4 d5 2. f5 d4 3. f6 d3 4. fxe7 dxe2 5. exd8=L exd1=T+ 6. Ke2 Txc1 7. Lxc7 Txb1 8. Lg3 Txa1 9. Le1 Txe1+ 10. Kxe1
Henrik Juel: The double CF is even double Prentos, as the promoted men are captured by officers (2018-12-29)
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Keywords: Ceriani-Frolkin Theme (Lt), Homebase (2), Unique Proof Game, Prentos Theme (Lt), Switchback (K)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.4 08:35:12 Stunden. (hh:mm:ss) Keine Lösung: BP 9.0.
FEN: rnb1kbnr/pp3ppp/8/8/8/8/PPPP2PP/4KBNR
Input: YM, 2011-03-03
Last update: A.Buchanan, 2023-07-11 more...
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.4 08:35:12 Stunden. (hh:mm:ss) Keine Lösung: BP 9.0.
FEN: rnb1kbnr/pp3ppp/8/8/8/8/PPPP2PP/4KBNR
Input: YM, 2011-03-03
Last update: A.Buchanan, 2023-07-11 more...
1. h2-h4 g7-g5 2. h4xg5 c7-c5 3. Th1-h6 c5-c4 4. Th6-b6 a7xb6 5. Sb1-c3 Ta8-a3 6. Sc3-b5 Ta3-e3 7. f2xe3 c4-c3 8. d2xc3 h7-h5 9. Dd1-d5 Th8-h6 10. Lc1-d2 Th6-f6 11. 0-0-0 Tf6xf1 12. Ld2-e1 Tf1-f4 13. Dd5-f3 f7-f5 14. Td1-d6 Tf4-d4 15. Td6-f6 e7xf6 16. Sb5-a3 Dd8-e7 17. Sa3-b1 De7-a3 18. Le1-d2 Da3-a8 19. a2-a4 Lf8-a3 20. Kc1-d1 Ke8-e7 21. Kd1-e1 Ke7-d6 22. Ld2-c1
Mario Richter: I do not know the intended solution, but the following play does the job:
1.h2-h4 g7-g5 2.h4xg5 c7-c5 3.Rh1-h6 c5-c4 4.Rh6-b6 a7xb6 5.Nb1-c3 Ra8-a3 6.Nc3-b5 Ra3-e3 7.f2xe3 c4-c3 8.d2xc3 h7-h5 9.Qd1-d5 Rh8-h6 10.Bc1-d2 Rh6-f6 11.0-0-0 Rf6xf1 12.Bd2-e1 Rf1-f4 13.Qd5-f3 f7-f5 14.Rd1-d6 Rf4-d4 15.Rd6-f6 e7xf6 16.Nb5-a3 Qd8-e7 17.Na3-b1 Qe7-a3 18.Be1-d2 Qa3-a8 19.a2-a4 Bf8-a3 20.Kc1-d1 Ke8-e7 21.Kd1-e1 Ke7-d6 22.Bd2-c1
I think the theme is the so-called Lois-theme, here executed by wK and wBc1 (2014-10-02)
Henrik Juel: Thanks, Mario.
Besides the interchange by two men doubled (Lois), there is a nice roundtrip by Sb1 and an unlikely castling; very good (2014-10-02)
Henrik Juel: Natch 3.1 did little in half an hour
Stopped at pos. 2 (2018-12-27)
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1.h2-h4 g7-g5 2.h4xg5 c7-c5 3.Rh1-h6 c5-c4 4.Rh6-b6 a7xb6 5.Nb1-c3 Ra8-a3 6.Nc3-b5 Ra3-e3 7.f2xe3 c4-c3 8.d2xc3 h7-h5 9.Qd1-d5 Rh8-h6 10.Bc1-d2 Rh6-f6 11.0-0-0 Rf6xf1 12.Bd2-e1 Rf1-f4 13.Qd5-f3 f7-f5 14.Rd1-d6 Rf4-d4 15.Rd6-f6 e7xf6 16.Nb5-a3 Qd8-e7 17.Na3-b1 Qe7-a3 18.Be1-d2 Qa3-a8 19.a2-a4 Bf8-a3 20.Kc1-d1 Ke8-e7 21.Kd1-e1 Ke7-d6 22.Bd2-c1
I think the theme is the so-called Lois-theme, here executed by wK and wBc1 (2014-10-02)
Henrik Juel: Thanks, Mario.
Besides the interchange by two men doubled (Lois), there is a nice roundtrip by Sb1 and an unlikely castling; very good (2014-10-02)
Henrik Juel: Natch 3.1 did little in half an hour
Stopped at pos. 2 (2018-12-27)
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Keywords: Unique Proof Game
Genre: Retro
Computer test: Moldenhauer Computerprüfung: C+ Stelvio 1.11 00:43:00 Minuten. (hh:mm:ss) Keine Lösung: BP 20.5, BP 21.0.
FEN: qnb3n1/1p1p4/1p1k1p2/5pPp/P2r4/b1P1PQ2/1PP1P1P1/1NB1K1N1
Input: Gerd Wilts, 2012-06-04
Last update: A.Buchanan, 2023-03-23 more...
Genre: Retro
Computer test: Moldenhauer Computerprüfung: C+ Stelvio 1.11 00:43:00 Minuten. (hh:mm:ss) Keine Lösung: BP 20.5, BP 21.0.
FEN: qnb3n1/1p1p4/1p1k1p2/5pPp/P2r4/b1P1PQ2/1PP1P1P1/1NB1K1N1
Input: Gerd Wilts, 2012-06-04
Last update: A.Buchanan, 2023-03-23 more...
1. Sc3 e5 2. Sd5 Lc5 3. Se7 d5 4. e3 Lh3 5. Dg4 a5 6. De6 f5 7. Se2 Sf6 8. Sc3 Tf8 9. Dg8 Ta6 10. Dh8 La7 11. Sg8 Tf7 12. Sb1 Td7 13. Sh6+ Ke7 14. Sf7 Df8 15. Sg5 Se8 16. Sf3 Tf6 17. Sg1
Henrik Juel: Thanks for the solution, Hans; I could not find it
The white knights switch places, very nice proof game (2015-01-26)
Henrik Juel: Natch 3.1 did little in half an hour
Stopped at pos. 1 (2018-12-31)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 05:48:08 Stunden. (hh:mm:ss)
Keine Lösung: BP 15.5, BP 16.0. (2023-03-05)
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The white knights switch places, very nice proof game (2015-01-26)
Henrik Juel: Natch 3.1 did little in half an hour
Stopped at pos. 1 (2018-12-31)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 05:48:08 Stunden. (hh:mm:ss)
Keine Lösung: BP 15.5, BP 16.0. (2023-03-05)
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Keywords: Unique Proof Game, Interchange (SS), Impostor (SS), Capture-free
Genre: Retro
Computer test: Stelvio 1.0
FEN: 1n2nq1Q/bpprk1pp/5r2/p2ppp2/8/4P2b/PPPP1PPP/RNB1KBNR
Input: A.Buchanan, 2015-01-25
Last update: Silvio Baier, 2023-03-20 more...
Genre: Retro
Computer test: Stelvio 1.0
FEN: 1n2nq1Q/bpprk1pp/5r2/p2ppp2/8/4P2b/PPPP1PPP/RNB1KBNR
Input: A.Buchanan, 2015-01-25
Last update: Silvio Baier, 2023-03-20 more...
27 - P1305233
Alexandre Leroux
4 Retro Championnat de France RIFACE 2015
(2+1) C+
KBP in 7.0
Ergänze die fehlenden Steine!
Alexandre Leroux
4 Retro Championnat de France RIFACE 2015
(2+1) C+
KBP in 7.0
Ergänze die fehlenden Steine!
a) 1. a4 Sf6 2. a5 Se4 3. a6 Sxd2 4. Kxd2 h5 5. Kc3 Th6 6. Kb4 Te6 7. Ka5 Te4
Originalforderung: Ajouter des pieces pour avoir une PCPJ en 7,0 Coups
Henrik Juel: Given the final position, the proof game is C+ by Euclide 1.01 (2015-07-08)
paul: Easily verified by Jacobi with the code: stipulation PG 7 pieces white Ka5 Pa6 black Re4 AddPieces (2021-07-06)
A.Buchanan: An essential linking word in the author's stipulation has been lost in translation: "Ajouter des pieces *pour* avoir une PCPJ en 7,0 Coups." I'm glad that on this occasion the Originalforderung was retained, but can we use a German template for these which is something like "Ergänze die fehlenden Steine um ein KBP in 7,0 zu haben". In English it would be "Add the missing pieces for an SPG in 7.0." (2021-07-07)
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Henrik Juel: Given the final position, the proof game is C+ by Euclide 1.01 (2015-07-08)
paul: Easily verified by Jacobi with the code: stipulation PG 7 pieces white Ka5 Pa6 black Re4 AddPieces (2021-07-06)
A.Buchanan: An essential linking word in the author's stipulation has been lost in translation: "Ajouter des pieces *pour* avoir une PCPJ en 7,0 Coups." I'm glad that on this occasion the Originalforderung was retained, but can we use a German template for these which is something like "Ergänze die fehlenden Steine um ein KBP in 7,0 zu haben". In English it would be "Add the missing pieces for an SPG in 7.0." (2021-07-07)
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Keywords: Unique Proof Game, Add pieces, Constrained problem
Genre: Retro
Computer test: rawbats, jacobi & Euclide
FEN: 8/8/P7/K7/4r3/8/8/8
Reprints: Phénix 2015
12 Phénix 296-297, p. 11536, 05-06/2019
1 Die Schwalbe 301, p. 440, 02/2020
Input: A.Buchanan, 2015-07-08
Last update: A.Buchanan, 2023-04-13 more...
Genre: Retro
Computer test: rawbats, jacobi & Euclide
FEN: 8/8/P7/K7/4r3/8/8/8
Reprints: Phénix 2015
12 Phénix 296-297, p. 11536, 05-06/2019
1 Die Schwalbe 301, p. 440, 02/2020
Input: A.Buchanan, 2015-07-08
Last update: A.Buchanan, 2023-04-13 more...
1. f4 e5 2. fxe5 Ld6 3. exd6 Se7 4. dxc7 Sec6 5. cxb8=D Dc7 6. Dxa8 Sb8 7. Dxb7 Dxc2 8. Db3 Dxd1+ 9. Dxd1
Keywords: Homebase (2), Pronkin Theme (D), Unique Proof Game, Impostor (s), Prenix (D)
Genre: Retro
FEN: 1nb1k2r/p2p1ppp/8/8/8/8/PP1PP1PP/RNBQKBNR
Input: YM, 2017-07-03
Last update: A.Buchanan, 2019-01-26 more...
Genre: Retro
FEN: 1nb1k2r/p2p1ppp/8/8/8/8/PP1PP1PP/RNBQKBNR
Input: YM, 2017-07-03
Last update: A.Buchanan, 2019-01-26 more...
29 - P1347210
Pascal Wassong
Thierry Le Gleuher
Axel Gilbert
RIFACE 2017
2nd Prize
(16+16) C+
KBP in 16,5
Weißer Längstzüger
Weißer Ohneschlag
Pascal Wassong
Thierry Le Gleuher
Axel Gilbert
RIFACE 2017
2nd Prize
(16+16) C+
KBP in 16,5
Weißer Längstzüger
Weißer Ohneschlag
1. Sf3 Sc6 2. Sd4 Se5 3. Sc6 a6 4. Sb8 c6 5. Sa3 Db6 6. Sc4 Db3 7. Sa5 Sc4 8. a4 Db5 9. Sb3 g5 10. Sc5 Lg7 11. Se4 Le5 12. Sc3 Lc7 13. Sb1 d6 14. Sd7 Sf6 15. Se5 0-0 16. Sf3 Kh8 17. Sg1
Joost de Heer: Solution: 1.Sf3 Sc6 2.Sd4 Se5 3.Sc6 a6 4.Sb8 c6 5.Sa3 Qb6 6.Sc4 Qb3 7.Sa5 Sc4 8.a4 Qb5 9.Sb3 g5 10.Sc5 Bg7 11.Se4 Be5 12.Sc3 Bc7 13.Sb1 d6 14.Sd7 Sf6 15.Se5 O-O 16.Sf3 Kh8 17.Sg1 (2021-01-04)
comment
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Keywords: Unique Proof Game, No-capture chess (w), Maximummer (w), RIFACE Retro Composition Tourney (2017)
Genre: Retro, Fairies
FEN: r1b2r1k/1pb1pp1p/p1pp1n2/1q4p1/P1n5/8/1PPPPPPP/RNBQKBNR
Reprints: Phénix 279-280, p. 10966, 11-12/2017
Input: A.Buchanan, 2018-02-24
Last update: Gerd Wilts, 2021-01-04 more...
Genre: Retro, Fairies
FEN: r1b2r1k/1pb1pp1p/p1pp1n2/1q4p1/P1n5/8/1PPPPPPP/RNBQKBNR
Reprints: Phénix 279-280, p. 10966, 11-12/2017
Input: A.Buchanan, 2018-02-24
Last update: Gerd Wilts, 2021-01-04 more...
30 - P1347216
Philippe Rouzaud
RIFACE 2017
1. Lob
(12+16) C+
KBP in 15,0
Weißer Längstzüger
Weißer Ohneschlag
Philippe Rouzaud
RIFACE 2017
1. Lob
(12+16) C+
KBP in 15,0
Weißer Längstzüger
Weißer Ohneschlag
paul: 1.Sa3 d5 2.Sc4 d×c4 3.Sf3 Qd3 4.Sd4 Kd8 5.Sb3 c×b3
6.h4 b×c2 7.Rh3 c×d1=B 8.Re3 Ba4 9.Re6 Be8 10.Ra6 Qd7
11.Rh6 g6 12.a4 Bg7 13.Ra3 Be5 14.Rh3 Bg3 15.Rh1 Bh2 (2021-08-19)
comment
6.h4 b×c2 7.Rh3 c×d1=B 8.Re3 Ba4 9.Re6 Be8 10.Ra6 Qd7
11.Rh6 g6 12.a4 Bg7 13.Ra3 Be5 14.Rh3 Bg3 15.Rh1 Bh2 (2021-08-19)
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Keywords: Unique Proof Game, No-capture chess (w), Maximummer (w), Non-standard material (l), RIFACE Retro Composition Tourney (2017)
Genre: Retro, Fairies
FEN: rnbkb1nr/pppqpp1p/6pR/8/P6P/8/1P1PPPPb/2B1KB1R
Reprints: Phénix 279-280, p. 10967, 11-12/2017
Input: A.Buchanan, 2018-02-24
Last update: A.Buchanan, 2020-10-05 more...
Genre: Retro, Fairies
FEN: rnbkb1nr/pppqpp1p/6pR/8/P6P/8/1P1PPPPb/2B1KB1R
Reprints: Phénix 279-280, p. 10967, 11-12/2017
Input: A.Buchanan, 2018-02-24
Last update: A.Buchanan, 2020-10-05 more...
1. Sc3 2. Sd5 3. c3 4. Da4 5. Da6 6. a4 7. a5 8. Ta4 9. Tg4 10. Tg5 11. g4 12. Lg2 13. Le4 14. Lb1 15. d3 16. Lf4 17. e3 18. Se2 19. Tg1 20. Tg3 21. Th3 22. Th6 23. h3 24. Lh2 25. Sdf4 26. Sh5 27. f4 28. Kf2 29. Kg3 30. Kh4 31. Seg3
Längste eindeutige Serienzug-BP ohne Schläge
Längste eindeutige Serienzug-BP ohne Schläge
Cf: P1017659
paul: Verified by Jacobi with: stip ser-dia 31 forsyth rsbqkbsr/pppppppp/Q6R/P5RS/5PPK/2PPP1SP/1P5B/1B6 (2021-12-09)
Joost de Heer: This is probably Kriegspiel? If there are no black pieces, the knight path on moves 25/26 can go over f6 as well. (2022-10-25)
A.Buchanan: Good catch, Joost. The black units (because of bK) are necessary. I haven’t heard the term Kriegspiel used to describe this. (2022-10-25)
Henrik Juel: This is a series proof game (where only White moves, and he may not check with an intermediate move)
I see no relation to the fairy condition Kriegspiel (2022-10-25)
comment
paul: Verified by Jacobi with: stip ser-dia 31 forsyth rsbqkbsr/pppppppp/Q6R/P5RS/5PPK/2PPP1SP/1P5B/1B6 (2021-12-09)
Joost de Heer: This is probably Kriegspiel? If there are no black pieces, the knight path on moves 25/26 can go over f6 as well. (2022-10-25)
A.Buchanan: Good catch, Joost. The black units (because of bK) are necessary. I haven’t heard the term Kriegspiel used to describe this. (2022-10-25)
Henrik Juel: This is a series proof game (where only White moves, and he may not check with an intermediate move)
I see no relation to the fairy condition Kriegspiel (2022-10-25)
comment
Keywords: Unique Proof Game, Seriesmover, Move Length Record (ex-aequo), Capture-free, Homebase (s)
Genre: Retro, Fairies
Computer test: paul: Verified by Jacobi with: stip ser-dia 31 forsyth rsbqkbsr/pppppppp/Q6R/P5RS/5PPK/2PPP1SP/1P5B/1B6
FEN: rnbqkbnr/pppppppp/Q6R/P5RN/5PPK/2PPP1NP/1P5B/1B6
Input: A.Buchanan, 2018-02-28
Last update: A.Buchanan, 2023-06-29 more...
Genre: Retro, Fairies
Computer test: paul: Verified by Jacobi with: stip ser-dia 31 forsyth rsbqkbsr/pppppppp/Q6R/P5RS/5PPK/2PPP1SP/1P5B/1B6
FEN: rnbqkbnr/pppppppp/Q6R/P5RN/5PPK/2PPP1NP/1P5B/1B6
Input: A.Buchanan, 2018-02-28
Last update: A.Buchanan, 2023-06-29 more...
1. Sc3 Sc6 2. Se4 Sd4 3. Sg5 Sxe2 4. Sxh7 Sxc1 5. Sxf8 Txh2 6. Se6 Txg2 7. Sxd8 Txf2 8. Sc6 Txd2 9. Sxa7 Txc2 10. Sxc8 Txb2 11. Sb6 Txb6 12. Th8 0-0-0 13. Txg8 Te8 14. Txe8#
Moldenhauer: Computerprüfung: C+ Stelvio 1.4 00:41:06 Minuten.(hh:mm:ss)
Keine Lösung: BP 13.0 mit Stelvio 1.31 überprüft.
Das heißt, nach Retraktion müsste man nicht mehr auf 13.0 überprüfen. (2023-07-23)
comment
Keine Lösung: BP 13.0 mit Stelvio 1.31 überprüft.
Das heißt, nach Retraktion müsste man nicht mehr auf 13.0 überprüfen. (2023-07-23)
comment
Keywords: Unique Proof Game, Castling
Genre: Retro
Computer test: Stelvio 1.4 Not shown as C+ in Phenix
FEN: 2k1R3/1pppppp1/1r6/8/8/8/P7/R1nQKBN1
Input: A.Buchanan, 2018-03-03
Last update: Silvio Baier, 2023-08-15 more...
Genre: Retro
Computer test: Stelvio 1.4 Not shown as C+ in Phenix
FEN: 2k1R3/1pppppp1/1r6/8/8/8/P7/R1nQKBN1
Input: A.Buchanan, 2018-03-03
Last update: Silvio Baier, 2023-08-15 more...
33 - P1347479
Pascal Wassong
Axel Gilbert
Thierry Le Gleuher
Michel Caillaud
7952 Phénix 277, p. 10888, 09/2017
(16+16) C+
BP in 15,0
Längstzüger
Schwarzer Ohneschlag
Pascal Wassong
Axel Gilbert
Thierry Le Gleuher
Michel Caillaud
7952 Phénix 277, p. 10888, 09/2017
(16+16) C+
BP in 15,0
Längstzüger
Schwarzer Ohneschlag
1. e4 Sa6 2. Lc4 Sc5 3. Ld5 Sa4 4. c4 Sb6 5. Da4 Sh6 6. Dc6 Sf5 7. a4 Sd4 8. Sa3 Sb3 9. Tb1 Sa5 10. b3 h5 11. Le6 Sd5 12. Lb2 Sf6 13. Dd5 Sg8 14. Lf6 Sc6 15. e5 Sb8
Joost de Heer: Solution: 1.e4 Sa6 2.Bc4 Sc5 3.Bd5 Sa4 4.c4 Sb6 5.Qa4 Sh6 6.Qc6 Sf5 7.a4 Sd4 8.Sa3 Sb3 9.Rb1 Sa5 10.b3 h5 11.Be6 Sd5 12.Bb2 Sf6 13.Qd5 Sg8 14.Bf6 Sc6 15.e5 Sb8 (2021-01-04)
Adrian Storisteanu: "Ohneschlag" is an unnecessary condition for a 16+16 position!? (2021-09-19)
Adrian Storisteanu: (Ah, OK, sorry, it prevents unwanted maximummer alternative moves...) (2021-09-19)
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Adrian Storisteanu: "Ohneschlag" is an unnecessary condition for a 16+16 position!? (2021-09-19)
Adrian Storisteanu: (Ah, OK, sorry, it prevents unwanted maximummer alternative moves...) (2021-09-19)
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Keywords: Unique Proof Game, Maximummer, No-capture chess (s)
Genre: Retro, Fairies
FEN: rnbqkbnr/ppppppp1/4BB2/3QP2p/P1P5/NP6/3P1PPP/1R2K1NR
Input: A.Buchanan, 2018-03-03
Last update: Gerd Wilts, 2021-01-04 more...
Genre: Retro, Fairies
FEN: rnbqkbnr/ppppppp1/4BB2/3QP2p/P1P5/NP6/3P1PPP/1R2K1NR
Input: A.Buchanan, 2018-03-03
Last update: Gerd Wilts, 2021-01-04 more...
Author was inspired by a series of computer educational games entitled "Where on Earth is Carmen Sandiego", starring the eponymous villainess.
Moldenhauer: Computerprüfung: C+ Jacobi v0.7.5 in 5 Sekunden.
Notation: 1.h4 e6 2.Th3 De7 3.Ta3 Dxa3 4.b4 Dxc1 (2023-07-31)
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Moldenhauer: Computerprüfung: C+ Jacobi v0.7.5 in 5 Sekunden.
Notation: 1.h4 e6 2.Th3 De7 3.Ta3 Dxa3 4.b4 Dxc1 (2023-07-31)
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Keywords: Unique Proof Game, Add pieces (d)
Genre: Retro
FEN: rnb1kbnr/pppp1ppp/4p3/8/1P5P/8/P1PPPPP1/RN1QKBN1
Reprints: 1 Phénix 287, p. 11251, 07-08/2018
Input: A.Buchanan, 2019-01-25
Last update: A.Buchanan, 2019-01-25 more...
Genre: Retro
FEN: rnb1kbnr/pppp1ppp/4p3/8/1P5P/8/P1PPPPP1/RN1QKBN1
Reprints: 1 Phénix 287, p. 11251, 07-08/2018
Input: A.Buchanan, 2019-01-25
Last update: A.Buchanan, 2019-01-25 more...
Marken Foo: There is a twin (b) +wSb1 pointed out by the chess.com user caveatcanis back in 2016, when accidentally misreading the diagram. It turns out to be a cute twin that fits the idea. (2020-10-21)
A.Buchanan: How many of these "Where in the world is Carmen Sandiego?" problems have you got, Marken? is it worth making a keyword? https://en.wikipedia.org/wiki/Carmen_Sandiego (2020-10-21)
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A.Buchanan: How many of these "Where in the world is Carmen Sandiego?" problems have you got, Marken? is it worth making a keyword? https://en.wikipedia.org/wiki/Carmen_Sandiego (2020-10-21)
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Keywords: Unique Proof Game, Add pieces (d)
Genre: Retro
FEN: rnbN1knr/pppppp2/8/8/8/8/PPPPPPP1/R1BQKB1R
Reprints: 9 Phénix 287, p. 11252, 07-08/2018
Input: A.Buchanan, 2019-01-25
Last update: A.Buchanan, 2020-10-21 more...
Genre: Retro
FEN: rnbN1knr/pppppp2/8/8/8/8/PPPPPPP1/R1BQKB1R
Reprints: 9 Phénix 287, p. 11252, 07-08/2018
Input: A.Buchanan, 2019-01-25
Last update: A.Buchanan, 2020-10-21 more...
1. e4 d5 2. exd5 Sc6 3. dxc6 Dd4 4. cxb7 Dxb2 5. d4 Dxa1 6. Lb2 Dxb2 7. d5 Db5 8. d6 Dd7 9. bxc8=T+ Dd8 10. d7#
Moldenhauer: Computerprüfung: C+ Stelvio 1.4 3 Sekunden.
Keine Lösung: BP 9.0 mit Stelvio 1.31 überprüft.
Notation: 1.e4 d5 2.exd5 Sc6 3.dxc6 Dd4 4.cxb7 Dxb2 5.d4 Dxa1 6.Lb2 Dxb2
7.d5 Db5 8.d6 Dd7 9.bxc8=T+ Dd8 10.d7# (2023-07-23)
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Keine Lösung: BP 9.0 mit Stelvio 1.31 überprüft.
Notation: 1.e4 d5 2.exd5 Sc6 3.dxc6 Dd4 4.cxb7 Dxb2 5.d4 Dxa1 6.Lb2 Dxb2
7.d5 Db5 8.d6 Dd7 9.bxc8=T+ Dd8 10.d7# (2023-07-23)
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Keywords: Unique Proof Game, Homebase (s), Pure mate, Round Trip (d), Hit Squad
Genre: Retro
Computer test: Stelvio 1.4
FEN: r1Rqkbnr/p1pPpppp/8/8/8/8/P1P2PPP/1N1QKBNR
Input: A.Buchanan, 2019-01-25
Last update: Silvio Baier, 2023-11-14 more...
Genre: Retro
Computer test: Stelvio 1.4
FEN: r1Rqkbnr/p1pPpppp/8/8/8/8/P1P2PPP/1N1QKBNR
Input: A.Buchanan, 2019-01-25
Last update: Silvio Baier, 2023-11-14 more...
1. Sb1-a3 e7-e5 2. Sa3-c4 Lf8-a3 3. Sc4xe5 La3xb2 4. a2-a4 Lb2-a3 5. Lc1xa3 Sb8-c6 6. La3-e7 d7-d6 7. Dd1-b1 Lc8-g4 8. Db1-b5 Lg4-f3 9. g2xf3 Dd8-d7 10. Lf1-h3 Sc6-b8 11. Lh3-e6 Dd7-c6 12. h2-h3 Sb8-d7 13. Th1-h2 Dc6xc2 14. Th2-g2 Dc2-c6 15. Tg2-g4 Sd7-b8 16. Tg4-c4 Dc6-d7 17. Tc4-c2 Sb8-c6 18. Le6-c4 Dd7-d8 19. Se5-d7 Sc6-b8
Reto: 1.Sb1-a3 Pe7-e5 2.Sa3-c4 Bf8-a3 3.Sc4xe5 Ba3xb2 4.Pa2-a4 Bb2-a3
5.Bc1xa3 Sb8-c6 6.Ba3-e7 Pd7-d6 7.Qd1-b1 Bc8-g4 8.Qb1-b5 Bg4-f3
9.Pg2xf3 Qd8-d7 10.Bf1-h3 Sc6-b8 11.Bh3-e6 Qd7-c6 12.Ph2-h3 Sb8-d7
13.Rh1-h2 Qc6xc2 14.Rh2-g2 Qc2-c6 15.Rg2-g4 Sd7-b8 16.Rg4-c4 Qc6-d7
17.Rc4-c2 Sb8-c6 18.Be6-c4 Qd7-d8 19.Se5-d7 Sc6-b8 (2023-05-18)
Henrik Juel: For this PG Stelvio 1.2 is a clear winner
Eulide 1.01 did nothing in half an hour (2023-05-18)
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5.Bc1xa3 Sb8-c6 6.Ba3-e7 Pd7-d6 7.Qd1-b1 Bc8-g4 8.Qb1-b5 Bg4-f3
9.Pg2xf3 Qd8-d7 10.Bf1-h3 Sc6-b8 11.Bh3-e6 Qd7-c6 12.Ph2-h3 Sb8-d7
13.Rh1-h2 Qc6xc2 14.Rh2-g2 Qc2-c6 15.Rg2-g4 Sd7-b8 16.Rg4-c4 Qc6-d7
17.Rc4-c2 Sb8-c6 18.Be6-c4 Qd7-d8 19.Se5-d7 Sc6-b8 (2023-05-18)
Henrik Juel: For this PG Stelvio 1.2 is a clear winner
Eulide 1.01 did nothing in half an hour (2023-05-18)
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Keywords: Unique Proof Game
Genre: Retro
Computer test: Stelvio 1.2, 3sec
FEN: rn1qk1nr/pppNBppp/3p4/1Q6/P1B5/5P1P/2RPPP2/R3K1N1
Input: A.Buchanan, 2019-01-25
Last update: Silvio Baier, 2023-11-14 more...
Genre: Retro
Computer test: Stelvio 1.2, 3sec
FEN: rn1qk1nr/pppNBppp/3p4/1Q6/P1B5/5P1P/2RPPP2/R3K1N1
Input: A.Buchanan, 2019-01-25
Last update: Silvio Baier, 2023-11-14 more...
1. d4 Sf6 2. Lh6 Tg8 3. e3 Ta8-h8 4. Da6 Sxa6 5. Sd2 Tb8 6. 0-0-0 Tba8 7. Kb1 Sb8 8. La6 Tgh8 9. Sf1 Sg8 10. Le1
Henrik Juel: C+ Jacobi 0.7.5
1.d4 Sf6 2.Bh6 Rg8 3.e3 Rah8 4.Qa6 Sxa6 5.Sd2 Rb8 6.O-O-O Rba8 7.Kb1 Sb8 8.Ba6 Rgh8 9.Sf1 Sg8 10.Be1
On a standard board Black would have made an even number of moves; not so here, with Ra8-h8-b8-a8 (2020-10-05)
A.Buchanan: This has exactly 200 solutions as a PG in 8.5, for example 1.d4 Sf6 2.Sd2 Sd5 3.e3 Sc3 4.Ba6 Sxd1 5.Sf1 Sc3 6.Bd2 Se4 7.O-O-O Sf6 8.Kb1 Sg8 9.Be1. It's restored to soundness if "genau" is stuck in the stipulation. (2021-06-10)
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1.d4 Sf6 2.Bh6 Rg8 3.e3 Rah8 4.Qa6 Sxa6 5.Sd2 Rb8 6.O-O-O Rba8 7.Kb1 Sb8 8.Ba6 Rgh8 9.Sf1 Sg8 10.Be1
On a standard board Black would have made an even number of moves; not so here, with Ra8-h8-b8-a8 (2020-10-05)
A.Buchanan: This has exactly 200 solutions as a PG in 8.5, for example 1.d4 Sf6 2.Sd2 Sd5 3.e3 Sc3 4.Ba6 Sxd1 5.Sf1 Sc3 6.Bd2 Se4 7.O-O-O Sf6 8.Kb1 Sg8 9.Be1. It's restored to soundness if "genau" is stuck in the stipulation. (2021-06-10)
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Keywords: Unique Proof Game, Vertical Cylinder, Homebase (s), RIFACE Retro Composition Tourney (2016), Initial Game Array (s)
Genre: Retro, Fairies
Computer test: C+ Jacobi 0.7.5 but shorter BPs exist
FEN: rnbqkbnr/pppppppp/B7/8/3P4/4P3/PPP2PPP/1K1RBNNR
Reprints: II Phénix 310-311, p. 12121, 09-10/2020
Input: A.Buchanan, 2020-10-05
Last update: A.Buchanan, 2021-06-10 more...
Genre: Retro, Fairies
Computer test: C+ Jacobi 0.7.5 but shorter BPs exist
FEN: rnbqkbnr/pppppppp/B7/8/3P4/4P3/PPP2PPP/1K1RBNNR
Reprints: II Phénix 310-311, p. 12121, 09-10/2020
Input: A.Buchanan, 2020-10-05
Last update: A.Buchanan, 2021-06-10 more...
1. e3 d6 2. La6 Lh3 3. Lxb7 Lxg2 4. Lxa8 Lxh1 5. Le4 Lxe4 6. c3 Lxb1 7. Db3 Lxa2 8. Dxa2 f6 9. Dxg8 h6 10. Dxf8 Kxf8
AB: I too made this one yesterday but alas on checking in WinChloe found that Francois’ software had got there first! This shows the utility of WinChloe and the power of Francois’ approach. And at least I can be grateful I didn’t try to publish!
This proof game is too long to be found by François’ general mining program, but he can adapt his program specifically to find ornamental problems such as this where the final positions are highly constrained and he can count whether any move is taking him nearer or further away from the right kind of position. The definitively unproductive lines can easily be pruned. Homebases and symmetric positions are also amenable to this kind of attack
See P1381496.
Henrik Juel: Solution
1.Be2-e3 Bd7-d6 2.Lf1-a6 Lc8-h3 3.La6xb7 Lh3xg2
4.Lb7xa8 Lg2xh1 5.La8-e4 Lh1xe4 6.Bc2-c3 Le4xb1
7.Dd1-b3 Lb1xa2 8.Db3xa2 Bf7-f6 9.Da2xg8 Bh7-h6
10.Dg8xf8 Ke8xf8
was found by Natch 3.1, which was stopped before completion
The C+ was probably found by construction, not by testing
The light-colored bishops do most of the work, with the white queen sweeping up at the end (2020-11-04)
A.Buchanan: Thanks Henrik - Natch 3.2 did complete in about 90 minutes. Oh the sadness of anticipation... (2020-11-05)
comment
This proof game is too long to be found by François’ general mining program, but he can adapt his program specifically to find ornamental problems such as this where the final positions are highly constrained and he can count whether any move is taking him nearer or further away from the right kind of position. The definitively unproductive lines can easily be pruned. Homebases and symmetric positions are also amenable to this kind of attack
See P1381496.
Henrik Juel: Solution
1.Be2-e3 Bd7-d6 2.Lf1-a6 Lc8-h3 3.La6xb7 Lh3xg2
4.Lb7xa8 Lg2xh1 5.La8-e4 Lh1xe4 6.Bc2-c3 Le4xb1
7.Dd1-b3 Lb1xa2 8.Db3xa2 Bf7-f6 9.Da2xg8 Bh7-h6
10.Dg8xf8 Ke8xf8
was found by Natch 3.1, which was stopped before completion
The C+ was probably found by construction, not by testing
The light-colored bishops do most of the work, with the white queen sweeping up at the end (2020-11-04)
A.Buchanan: Thanks Henrik - Natch 3.2 did complete in about 90 minutes. Oh the sadness of anticipation... (2020-11-05)
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Keywords: Unique Proof Game, Ornament
Genre: Retro
Computer test: C+ Natch 3.2 in 1hr 32 mins
FEN: 1n1q1k1r/p1p1p1p1/3p1p1p/8/8/2P1P3/1P1P1P1P/R1B1K1N1
Input: A.Buchanan, 2020-11-04
Last update: A.Buchanan, 2020-11-05 more...
Genre: Retro
Computer test: C+ Natch 3.2 in 1hr 32 mins
FEN: 1n1q1k1r/p1p1p1p1/3p1p1p/8/8/2P1P3/1P1P1P1P/R1B1K1N1
Input: A.Buchanan, 2020-11-04
Last update: A.Buchanan, 2020-11-05 more...
40 - P1384148
Bernd Graefrath
6120 Phénix 194, p. 8176, 04/2010
(13+11)
Beweispartie in 7,5 Zügen
2 Lösungen
Schlagschach
Bernd Graefrath
6120 Phénix 194, p. 8176, 04/2010
(13+11)
Beweispartie in 7,5 Zügen
2 Lösungen
Schlagschach
1. b4 h5 2. e4 h4 3. Dg4 h3 4. Dxg7 hxg2 5. Dxh8 gxf1=L 6. Dxg8 c5 7. Dxf7 Kxf7 8. Kxf1 (ein L-Schnoebelen)
1. g3 h5 2. e4 Sh6 3. Dxh5 Sf5 4. Dxh8 Sxg3 5. Dxg7 Sxf1 6. Dxf7+ Kxf7 7. Kxf1 c5 8. b4 (il est original ici que le C vienne se faire capturer sur la même case que le Fou dans l'autre solution.)
Un problème qui était proposé par l'auteur pour le concours de Messigny 2010, mais que j'ai jugé trop difficile à résoudre dans le temps et les conditions de l'épreuve.
Keywords: Beweispartie, Schnoebelen-Umwandlung (L)
1. g3 h5 2. e4 Sh6 3. Dxh5 Sf5 4. Dxh8 Sxg3 5. Dxg7 Sxf1 6. Dxf7+ Kxf7 7. Kxf1 c5 8. b4 (il est original ici que le C vienne se faire capturer sur la même case que le Fou dans l'autre solution.)
Un problème qui était proposé par l'auteur pour le concours de Messigny 2010, mais que j'ai jugé trop difficile à résoudre dans le temps et les conditions de l'épreuve.
Keywords: Beweispartie, Schnoebelen-Umwandlung (L)
Keywords: Losing Chess, Unique Proof Game
Genre: Retro, Fairies
FEN: rnbq1b2/pp1ppk2/8/2p5/1P2P3/8/P1PP1P1P/RNB2KNR
Input: RJB, 2011-05-30
Last update: Gerd Wilts, 2020-12-26 more...
Genre: Retro, Fairies
FEN: rnbq1b2/pp1ppk2/8/2p5/1P2P3/8/P1PP1P1P/RNB2KNR
Input: RJB, 2011-05-30
Last update: Gerd Wilts, 2020-12-26 more...
41 - P1384738
Pascal Wassong
Phénix 2014
1./2. Preis ex aequo
Caillaud 50 JT
(14+15) C+
BP in 12,0
b) wLf2 statt wDf2
Pascal Wassong
Phénix 2014
1./2. Preis ex aequo
Caillaud 50 JT
(14+15) C+
BP in 12,0
b) wLf2 statt wDf2
a) 1. a4 a5 2. Ta3 Ta6 3. Th3 Tf6 4. d3 Txf2 5. Lg5 Tf6 6. Lxf6 gxf6 7. g4 Lh6 8. Tg3 Kf8 9. Lh3 Kg7 10. Kf1 Kg6 11. De1 Lf8 12. Df2 Kg7
b) 1. g4 a5 2. Lh3 Ta6 3. Kf1 Tf6 4. De1 Txf2+ 5. Dxf2 Sh6 6. Df6 gxf6 7. a4 Lg7 8. Ta3 Kf8 9. Tg3 Kg8 10. d3 Lf8 11. Le3 Kg7 12. Lf2 Sg8
b) 1. g4 a5 2. Lh3 Ta6 3. Kf1 Tf6 4. De1 Txf2+ 5. Dxf2 Sh6 6. Df6 gxf6 7. a4 Lg7 8. Ta3 Kf8 9. Tg3 Kg8 10. d3 Lf8 11. Le3 Kg7 12. Lf2 Sg8
Keywords: Unique Proof Game
Genre: Retro
Computer test: C+ Euclide 1.01
FEN: 1nbq1bnr/1pppppkp/5p2/p7/P5P1/3P2RB/1PP1PQ1P/1N3KNR
Input: fs/hg, 2020-12-30
Last update: A.Buchanan, 2021-01-02 more...
Genre: Retro
Computer test: C+ Euclide 1.01
FEN: 1nbq1bnr/1pppppkp/5p2/p7/P5P1/3P2RB/1PP1PQ1P/1N3KNR
Input: fs/hg, 2020-12-30
Last update: A.Buchanan, 2021-01-02 more...
1. d3 e6 2. Le3 Se7 3. Lxa7 Sec6 4. Lxb8 Sxb8 5. d4
Sibling Sb8
Sibling Sb8
Keywords: Unique Proof Game, Pawn step variations
Genre: Retro
FEN: rnbqkb1r/1ppp1ppp/4p3/8/3P4/8/PPP1PPPP/RN1QKBNR
Reprints: R4 Phénix 312, p. 12149, 11/2020
Input: A.Buchanan, 2021-05-17
Last update: Gunter Jordan, 2021-05-18 more...
Genre: Retro
FEN: rnbqkb1r/1ppp1ppp/4p3/8/3P4/8/PPP1PPPP/RN1QKBNR
Reprints: R4 Phénix 312, p. 12149, 11/2020
Input: A.Buchanan, 2021-05-17
Last update: Gunter Jordan, 2021-05-18 more...
1. d3 Sh6 2. Lxh6 e5 3. e3 Lc5 4. Se2 Lxe3 5. Sc1 Lxc1 6. Lxc1 0-0
Moldenhauer: Computerprüfung: C+ Jacobi v0.7.6 beta1 in 7 Min. PG demolition mode (2022-08-07)
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Keywords: Unique Proof Game, Castling, Switchback (L)
Genre: Retro
FEN: rnbq1rk1/pppp1ppp/8/4p3/8/3P4/PPP2PPP/RNBQKB1R
Reprints: R5 Phénix 312, p. 12149, 11/2020
Input: A.Buchanan, 2021-05-17
Last update: Gunter Jordan, 2021-05-18 more...
Genre: Retro
FEN: rnbq1rk1/pppp1ppp/8/4p3/8/3P4/PPP2PPP/RNBQKB1R
Reprints: R5 Phénix 312, p. 12149, 11/2020
Input: A.Buchanan, 2021-05-17
Last update: Gunter Jordan, 2021-05-18 more...
44 - P1390684
Eric Pichouron
8799 Phénix 310-311, p. 12108, 09-10/2020
(14+12) C+
BP in 14.0
Knightmate
Eric Pichouron
8799 Phénix 310-311, p. 12108, 09-10/2020
(14+12) C+
BP in 14.0
Knightmate
(a) 1. d4 g5 2. d5 g4 3. d6 g3 4. dxe7 d5 5. b4 Lf5 6. b5 Kc8 7. b6 Kd7 8. bxc7 Tc8 9. cxd8=L Tc3 10. exf8=L Tf3 11. c4 Kxf8 12. c5 Kfe7 13. c6 0-0 14. Lh6 Kexd8
Keywords: Unique Proof Game, Knightmate
Genre: Retro, Fairies
Computer test: C+ Jacobi
FEN: 3k1rn1/pp1k1p1p/2P4B/3p1b2/8/5rp1/P3PPPP/RK1QNBKR
Input: A.Buchanan, 2021-06-09
Last update: A.Buchanan, 2023-07-09 more...
Genre: Retro, Fairies
Computer test: C+ Jacobi
FEN: 3k1rn1/pp1k1p1p/2P4B/3p1b2/8/5rp1/P3PPPP/RK1QNBKR
Input: A.Buchanan, 2021-06-09
Last update: A.Buchanan, 2023-07-09 more...
1. c4 a5 2. c5 a4 3. c6 a3 4. cxb7 c5 5. f4 Sc6 6. b8=T Lc8-a6 7. f5 Lc4 8. f6 Lb3 9. fxe7 c4 10. exf8=T= Ke7 11. h4 Kd6 12. h5 Df6 13. h6 Sge7 14. hxg7 h5 15. g8=T h4 16. Tg5 Tg8 17. Tgb5 Tg3 18. Tg8 Sg6 19. Tbf8 Td8 20. Tb8
Keywords: Unique Proof Game, Non-standard material (TTT), Interchange (TTT), konsekutive Umwandlungen 3 (TTT)
Genre: Retro
Computer test: C+ Euclide 1.01
FEN: 1R1r1RR1/3p1p2/2nk1qn1/8/2p4p/pb4r1/PP1PP1P1/RNBQKBNR
Input: A.Buchanan, 2021-06-09
Last update: A.Buchanan, 2021-10-22 more...
Genre: Retro
Computer test: C+ Euclide 1.01
FEN: 1R1r1RR1/3p1p2/2nk1qn1/8/2p4p/pb4r1/PP1PP1P1/RNBQKBNR
Input: A.Buchanan, 2021-06-09
Last update: A.Buchanan, 2021-10-22 more...
46 - P1390686
Andrey Frolkin
Sergej Tkatschenko
8801 Phénix 310-311, p. 12108, 09-10/2020
(14+14) C+
BP in 21.5
Andrey Frolkin
Sergej Tkatschenko
8801 Phénix 310-311, p. 12108, 09-10/2020
(14+14) C+
BP in 21.5
1. a4 Sc6 2. Ta3 Se5 3. Th3 Sg6 4. Th6 gxh6 5. b3 Lg7 6. La3 Lb2 7. Lc5 Sf6 8. Lb6 axb6 9. Sf3 Ta5 10. Sd4 Tf5 11. Sb5 Tf3 12. gxf3 0-0 13. Lh3 Kh8 14. 0-0 Tg8 15. Kh1 Df8 16. Tg1 Dg7 17. Df1 Tf8 18. Dg2 Kg8 19. Tf1 Sh8 20. Kg1 Dg3 21. hxg3 Lc1 22. Dh2
Keywords: Unique Proof Game
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.0 00:08:58 Minuten. (hh:mm:ss) Keine Lösung: BP20.5, BP 21.0
FEN: 2b2rkn/1ppppp1p/1p3n1p/1N6/P7/1P3PPB/2PPPP1Q/1Nb2RK1
Input: A.Buchanan, 2021-06-09
Last update: A.Buchanan, 2023-03-13 more...
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.0 00:08:58 Minuten. (hh:mm:ss) Keine Lösung: BP20.5, BP 21.0
FEN: 2b2rkn/1ppppp1p/1p3n1p/1N6/P7/1P3PPB/2PPPP1Q/1Nb2RK1
Input: A.Buchanan, 2021-06-09
Last update: A.Buchanan, 2023-03-13 more...
1. a4 d5 2. Ta3 Lg4 3. Te3 Lf3 4. exf3 Kd7 5. Lb5 Kd6 6. Se2 d4 7. 0-0 d3 8. Kh1 dxe2 9. d4 exf1=L 10. d5 Ld3 11. Te2 Lf5 12. Dd3 Lc8 13. Lf4+ e5 14. dxe6ep+
Keywords: Unique Proof Game, Valladao Task, Castling, En passant, under-promotion (l), Pronkin Theme (l)
Genre: Retro
Computer test: C+ Euclide 1.01, no solution in 12.5
FEN: rnbq1bnr/ppp2ppp/3kP3/1B6/P4B2/3Q1P2/1PP1RPPP/1N5K
Reprints: Problemesis 4 08/1998
M4 Phénix 66, p. 4112, 09/1998
13 Orbit 30, p. 318, 04/2006
Input: A.Buchanan, 2021-07-03
Last update: Alfred Pfeiffer, 2021-11-26 more...
Genre: Retro
Computer test: C+ Euclide 1.01, no solution in 12.5
FEN: rnbq1bnr/ppp2ppp/3kP3/1B6/P4B2/3Q1P2/1PP1RPPP/1N5K
Reprints: Problemesis 4 08/1998
M4 Phénix 66, p. 4112, 09/1998
13 Orbit 30, p. 318, 04/2006
Input: A.Buchanan, 2021-07-03
Last update: Alfred Pfeiffer, 2021-11-26 more...
48 - P1391300
Igor Vereshchagin
Michel Caillaud
IV Phénix 206, p. 8574, 06/2011
(15+12) C+
BP in 15.5
Igor Vereshchagin
Michel Caillaud
IV Phénix 206, p. 8574, 06/2011
(15+12) C+
BP in 15.5
1. e2-e4 c7-c5 2. Lf1-d3 c5-c4 3. Sg1-e2 c4-c3 4. 0-0 c3xd2 5. c2-c4 e7-e6 6. Se2-c3 Lf8-a3 7. Dd1-e2 d2-d1=S 8. f2-f4 Sd1-f2 9. b2xa3 Sf2-h3 10. g2xh3 Ke8-e7 11. Tf1-f2 Ke7-f6 12. Kg1-f1 Kf6-g6 13. e4-e5 f7-f5 14. e5xf6ep Kg6-h6 15. f4-f5 g7-g5 16. f5xg6ep#
Keywords: Unique Proof Game, Valladao Task, Castling, En passant (2), under-promotion (s), Ceriani-Frolkin Theme (s)
Genre: Retro
Computer test: Euclide 1.01, no solution in 14.5
FEN: rnbq2nr/pp1p3p/4pPPk/8/2P5/P1NB3P/P3QR1P/RNB2K2
Reprints: 791 Problemskak 17, p. 9, 2012
Input: A.Buchanan, 2021-07-03
Last update: Alfred Pfeiffer, 2021-11-26 more...
Genre: Retro
Computer test: Euclide 1.01, no solution in 14.5
FEN: rnbq2nr/pp1p3p/4pPPk/8/2P5/P1NB3P/P3QR1P/RNB2K2
Reprints: 791 Problemskak 17, p. 9, 2012
Input: A.Buchanan, 2021-07-03
Last update: Alfred Pfeiffer, 2021-11-26 more...
49 - P1400893
Peter Wong
8897 Phénix 312 11/2020
(13+16)
BP in 5,0
b) Te4 nach d6
c) + Td6 nach g5
d) + Ba5 to a4
e) + Tg5 to d5
f) + Ba4 to a5, Be2 to e3
Peter Wong
8897 Phénix 312 11/2020
(13+16)
BP in 5,0
b) Te4 nach d6
c) + Td6 nach g5
d) + Ba5 to a4
e) + Tg5 to d5
f) + Ba4 to a5, Be2 to e3
a) 1. d4 a5 2. Lf4 Ta6 3. Ld6 Txd6 4. Dd3 Txd4 5. De4 Txe4
b) 1. d4 a5 2. d5 Ta6 3. d6 Txd6 4. Lh6 Txh6 5. Dd6 Txd6
c) 1. d4 a5 2. d5 Ta6 3. d6 Txd6 4. Dd5 Txd5 5. Lg5 Txg5
d) 1. d4 a5 2. Dd2 a4 3. Da5 Txa5 4. d5 Txd5 5. Lg5 Txg5
e) 1. d4 a5 2. Dd2 a4 3. Da5 Txa5 4. Lg5 Txg5 5. d5 Txd5
f) 1. d4 a5 2. Lh6 Ta6 3. e3 Txh6 4. Dh5 Txh5 5. d5 Txd5
b) 1. d4 a5 2. d5 Ta6 3. d6 Txd6 4. Lh6 Txh6 5. Dd6 Txd6
c) 1. d4 a5 2. d5 Ta6 3. d6 Txd6 4. Dd5 Txd5 5. Lg5 Txg5
d) 1. d4 a5 2. Dd2 a4 3. Da5 Txa5 4. d5 Txd5 5. Lg5 Txg5
e) 1. d4 a5 2. Dd2 a4 3. Da5 Txa5 4. Lg5 Txg5 5. d5 Txd5
f) 1. d4 a5 2. Lh6 Ta6 3. e3 Txh6 4. Dh5 Txh5 5. d5 Txd5
Henrik Juel: C+ Popeye 4.61
Popeye would not do all twins in one go, so I had to fiddle a bit
I hope the solutions are correct (2022-04-26)
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Popeye would not do all twins in one go, so I had to fiddle a bit
I hope the solutions are correct (2022-04-26)
more ...
comment
Keywords: Unique Proof Game, Homebase (w)
Genre: Retro
Computer test: Henrik Juel (2022-04-26): C+ Popeye 4.61
FEN: 1nbqkbnr/1ppppppp/8/p7/4r3/8/PPP1PPPP/RN2KBNR
Input: A.Buchanan, 2022-04-26
Last update: Peter Wong, 2022-04-27 more...
Genre: Retro
Computer test: Henrik Juel (2022-04-26): C+ Popeye 4.61
FEN: 1nbqkbnr/1ppppppp/8/p7/4r3/8/PPP1PPPP/RN2KBNR
Input: A.Buchanan, 2022-04-26
Last update: Peter Wong, 2022-04-27 more...
1. f4 c5 2. f5 c4 3. f6 c3 4. fxg7 cxb2 5. gxh8=S bxa1=D 6. Sg6 Dg7 7. Sxf8 Dxg2 8. Lxg2 Kxf8 9. Lf1 Ke8
Henrik Juel: ... actually 1:04 h:m
C+ Popeye 4.61, in 1:15 h:m
I guessed that this type of problem was tested most rapidly by a plain total search, like Popeye and Jacobi
Smart PG solvers, like Natch, Euclide, and Stelvio, cut down parts of the search tree by reasoning like a human solver; but here the cutting down is largely wasted, because there are few clues
Conclusion:
Solve this type of problem by hand and let somebody else test it... (2023-03-24)
A.Buchanan: Yes: human solving for this kind of problem is suggestive rather than deductive. For example, the "footprints in the snow" on the queenside: it looks as if sBc may have captured on b2 & a1, then went away after promotion. That suggests that maybe wBf captured g2 & f8/8. Got to explain two more holes: g2 & h8/f8. Pronkin doesn't seem like a possibility, so capturer switchback seems the most likely. But how to *prove* this is the only solution? This problem was composed for the RIFACE solving competition, and was one of the easier ones. (2023-04-26)
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C+ Popeye 4.61, in 1:15 h:m
I guessed that this type of problem was tested most rapidly by a plain total search, like Popeye and Jacobi
Smart PG solvers, like Natch, Euclide, and Stelvio, cut down parts of the search tree by reasoning like a human solver; but here the cutting down is largely wasted, because there are few clues
Conclusion:
Solve this type of problem by hand and let somebody else test it... (2023-03-24)
A.Buchanan: Yes: human solving for this kind of problem is suggestive rather than deductive. For example, the "footprints in the snow" on the queenside: it looks as if sBc may have captured on b2 & a1, then went away after promotion. That suggests that maybe wBf captured g2 & f8/8. Got to explain two more holes: g2 & h8/f8. Pronkin doesn't seem like a possibility, so capturer switchback seems the most likely. But how to *prove* this is the only solution? This problem was composed for the RIFACE solving competition, and was one of the easier ones. (2023-04-26)
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Keywords: Unique Proof Game, Homebase (2)
Genre: Retro
Computer test: C+, Jacobi v0.7.5 C+ Popeye 4.61, in 1:15 h:m C+ Stelvio 1.0 also, in 1:04 h:m c
FEN: rnbqk1n1/pp1ppp1p/8/8/8/8/P1PPP2P/1NBQKBNR
Input: A.Buchanan, 2023-03-24
Last update: A.Buchanan, 2023-04-26 more...
Genre: Retro
Computer test: C+, Jacobi v0.7.5 C+ Popeye 4.61, in 1:15 h:m C+ Stelvio 1.0 also, in 1:04 h:m c
FEN: rnbqk1n1/pp1ppp1p/8/8/8/8/P1PPP2P/1NBQKBNR
Input: A.Buchanan, 2023-03-24
Last update: A.Buchanan, 2023-04-26 more...
1. c3 e5 2. Da4 Dh4 3. Dd4 Dxd4 4. cxd4 f6 5. dxe5 Kf7 6. exf6 Kg6 7. fxg7 Sf6 8. g8=D+ Lg7
Keywords: Unique Proof Game, RIFACE Retro Solving Tourney (2022), Promotion (D), Phoenix (D)
Genre: Retro
Computer test: C+ Jacobi v0.7.5 Euclide 1.01 found no solutions in 7.5 and 7.0 moves
FEN: rnb3Qr/pppp2bp/5nk1/8/8/8/PP1PPPPP/RNB1KBNR
Input: A.Buchanan, 2023-05-20
Last update: A.Buchanan, 2023-05-20 more...
Genre: Retro
Computer test: C+ Jacobi v0.7.5 Euclide 1.01 found no solutions in 7.5 and 7.0 moves
FEN: rnb3Qr/pppp2bp/5nk1/8/8/8/PP1PPPPP/RNB1KBNR
Input: A.Buchanan, 2023-05-20
Last update: A.Buchanan, 2023-05-20 more...
1. h4 a5 2. h5 a4 3. h6 a3 4. hxg7 axb2 5. gxh8=S bxa1=D 6. Sxf7 De5 7. Sxd8 Dh5 8. Sc6 Sxc6 9. Lb2 Sa7 10. Lh8 Lg7
Keywords: Unique Proof Game, RIFACE Retro Solving Tourney (2022), Promotion (Sd), Ceriani-Frolkin Theme (S), Prentos Theme (S), Prenix (d)
Genre: Retro
Computer test: C+ by Euclide 1.01, who found no solutions in 9.5 and 9.0 moves
FEN: r1b1k1nB/npppp1bp/8/7q/8/8/P1PPPPP1/1N1QKBNR
Input: A.Buchanan, 2023-05-20
Last update: A.Buchanan, 2023-05-20 more...
Genre: Retro
Computer test: C+ by Euclide 1.01, who found no solutions in 9.5 and 9.0 moves
FEN: r1b1k1nB/npppp1bp/8/7q/8/8/P1PPPPP1/1N1QKBNR
Input: A.Buchanan, 2023-05-20
Last update: A.Buchanan, 2023-05-20 more...
1. e4 c5 2. Lb5 c4 3. Se2 c3 4. 0-0 cxd2 5. Te1 dxe1=L 6. c4 Lc3 7. bxc3 g6 8. Lb2 Lh6 9. Sc1 Ld2 10. De2 Le1
Keywords: Unique Proof Game, RIFACE Retro Solving Tourney (2022)
Genre: Retro
Computer test: C+ by Euclide 1.01, who found no solutions in 9.5 and 9.0 moves
FEN: rnbqk1nr/pp1ppp1p/6p1/1B6/2P1P3/2P5/PB2QPPP/RNN1b1K1
Input: A.Buchanan, 2023-05-20
Last update: A.Buchanan, 2023-05-20 more...
Genre: Retro
Computer test: C+ by Euclide 1.01, who found no solutions in 9.5 and 9.0 moves
FEN: rnbqk1nr/pp1ppp1p/6p1/1B6/2P1P3/2P5/PB2QPPP/RNN1b1K1
Input: A.Buchanan, 2023-05-20
Last update: A.Buchanan, 2023-05-20 more...
1. a4 Sc6 2. a5 Sxa5 3. b4 Sc4 4. Lb2 Se3 5. Le5 Sxf1 6. Lg3 Sxg3 7. Dc1 Sxh1 8. Da3 Sxf2 9. Dd3 Sxd3 10. Kf1 Sxb4 11. Ta6 Sxa6 12. Kf2 Sb8 13. Ke1
Henrik Juel: many solutions in 12.0 moves, like
1. Bf2-f4 Sg8-h6 2. Bf4-f5 Sh6xf5 3. Bb2-b4 Sf5-e3
4. Lc1-b2 Se3xf1 5. Lb2-c3 Sf1-e3 6. Sg1-h3 Se3xd1
7. Th1-f1 Sd1xc3 8. Tf1-f5 Sc3xa2 9. Tf5-d5 Sa2xb4
10. Ta1-a6 Sb4xd5 11. Ta6-f6 Sd5xf6 12. Sh3-g1 Sf6-g8 (2023-05-20)
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1. Bf2-f4 Sg8-h6 2. Bf4-f5 Sh6xf5 3. Bb2-b4 Sf5-e3
4. Lc1-b2 Se3xf1 5. Lb2-c3 Sf1-e3 6. Sg1-h3 Se3xd1
7. Th1-f1 Sd1xc3 8. Tf1-f5 Sc3xa2 9. Tf5-d5 Sa2xb4
10. Ta1-a6 Sb4xd5 11. Ta6-f6 Sd5xf6 12. Sh3-g1 Sf6-g8 (2023-05-20)
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Keywords: Unique Proof Game, RIFACE Retro Solving Tourney (2022), Homebase (2), Initial Game Array (s)
Genre: Retro
Computer test: C+ Euclide 1.01
FEN: rnbqkbnr/pppppppp/8/8/8/8/2PPP1PP/1N2K1N1
Input: A.Buchanan, 2023-05-20
Last update: A.Buchanan, 2023-05-20 more...
Genre: Retro
Computer test: C+ Euclide 1.01
FEN: rnbqkbnr/pppppppp/8/8/8/8/2PPP1PP/1N2K1N1
Input: A.Buchanan, 2023-05-20
Last update: A.Buchanan, 2023-05-20 more...
1. a4 h5 2. a5 h4 3. a6 h3 4. axb7 Sa6 5. b8=S Th4 6. Sc6 dxc6 7. g4 Lf5 8. g5 Ld3 9. e4 Dd7 10. De2 0-0-0 11. Kd1 De8 12. De1 Td6 13. Le2 Tdh6 14. Lg4 f5 15. gxf6ep Kd8
Keywords: Unique Proof Game, RIFACE Retro Solving Tourney (2022)
Genre: Retro
Computer test: C+ by Euclide 1.01, who found no solutions in 14.5 and 14.0 moves
FEN: 3kqbn1/p1p1p1p1/n1p2P1r/8/4P1Br/3b3p/1PPP1P1P/RNBKQ1NR
Input: A.Buchanan, 2023-05-20
Last update: A.Buchanan, 2023-05-20 more...
Genre: Retro
Computer test: C+ by Euclide 1.01, who found no solutions in 14.5 and 14.0 moves
FEN: 3kqbn1/p1p1p1p1/n1p2P1r/8/4P1Br/3b3p/1PPP1P1P/RNBKQ1NR
Input: A.Buchanan, 2023-05-20
Last update: A.Buchanan, 2023-05-20 more...
1. b4 c6 2. b5 Da5 3. bxc6[+sBc7] Dxa2 4. Txa2[+sDd8] Sxc6 5. Ta1 Sb8
Keywords: Unique Proof Game, Homebase (2), Initial Game Array (S), Circe, RIFACE Retro Solving Tourney (2022)
Genre: Retro, Fairies
Computer test: C+, Jacobi v0.7.5
FEN: rnbqkbnr/pppppppp/8/8/8/8/2PPPPPP/RNBQKBNR
Input: A.Buchanan, 2023-05-20
Last update: A.Buchanan, 2023-05-20 more...
Genre: Retro, Fairies
Computer test: C+, Jacobi v0.7.5
FEN: rnbqkbnr/pppppppp/8/8/8/8/2PPPPPP/RNBQKBNR
Input: A.Buchanan, 2023-05-20
Last update: A.Buchanan, 2023-05-20 more...
Show statistic for complete result. Show search result faster by using ids.
https://pdb.dieschwalbe.de/search.jsp?expression=COMMENTDATE%3E%3D20200919+AND+NOT+K%3D%27Hilfsr%C3%BCckz%C3%BCger%27+AND+S%3D%27Phenix%27+AND+K%3D%27Eindeutige+Beweispartie%27
The problems of this query have been registered by the following contributors:
Gerd Wilts (24)YM (2)
A.Buchanan (28)
RJB (1)
fs/hg (1)
Solution:
1. Sf3 f5 2. Sd4 Kf7 3. Sb5 Kg6 4. Sd6 exd6 5. e4 Le7 6. e5 Lh4 7. e6 Dg5 8. e7 Dg3 9. e8=T Se7 10. Lc4 Tf8 11. 0-0 Tf6 12. f3 Kh5 13. Te1 Th6 14. Lf7+ Sg6 15. T1e6 dxe6 16. Txc8 Sd7 17. Th8 Txh8 18. Le8 (2022-12-08)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.2 00:33:56 Minuten. (hh:mm:ss)
Keine Lösung: BP 17.5, BP 18.0.
Beispiel: 1.Sf3 f5 2.d4 Kf7 3.e4 g5 4.Lc4+ Kg6 5.e5 Lg7 6.e6 Lxd4
7.0–0 Lxb2 8.Dd6 exd6 9.e7 Kh5 10.e8S Se7 11.Te1 Tf8 12.Sxg5 Tf6
13.f3 Th6 14.Lf7+ Sg6 15.Te7 Lf6 16.Se6 dxe6 17.Td7 Lh4 18.Lg5 Dxg5
19.Sg7# (2023-05-30)
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