233 problem(s) found in 3318 milliseconds (displaying 100 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT K='symmetrisches Spiel' AND K='Homebase'] [download as LaTeX]
1. Sf3 e5 2. Sxe5 Se7 3. Sxd7 Sec6 4. Sxb8 Dxd2 5. Dxd2 Sxb8 6. Dd8+ Kxd8
Cook: 1. Sh3 d5 2. Sf4 Sf6 3. Sxd5 Se4 4. Sxe7 Sxd2 5. Dxd2 Kxe7 6. Dxd8 Kxd8
(Can transpose B1&B2)
Cook: 1. Sh3 d5 2. Sf4 Sf6 3. Sxd5 Se4 4. Sxe7 Sxd2 5. Dxd2 Kxe7 6. Dxd8 Kxd8
(Can transpose B1&B2)
Keywords: Unique Proof Game, Homebase (W), Impostor (s), Superseded by (P1394733)
Genre: Retro
FEN: rnbk1b1r/ppp2ppp/8/8/8/8/PPP1PPPP/RNB1KB1R
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2021-10-21 more...
Genre: Retro
FEN: rnbk1b1r/ppp2ppp/8/8/8/8/PPP1PPPP/RNB1KB1R
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2021-10-21 more...
2 - P0000790
Gideon Husserl
1555 Die Schwalbe 33 06/1975
(14+16)
Wieviele und welche Steine zogen in der KBP?
Gideon Husserl
1555 Die Schwalbe 33 06/1975
(14+16)
Wieviele und welche Steine zogen in der KBP?
1. Sa3 Sa6 2. Sh3 Sc5 3. Tg1 Sb3 4. Th1 Sxc1 5. Tg1 Sb3 6. Db1 Sd4 7. Dc1 Sf3+ 8. Kd1 Sxg1 9. Sb1 Sf3 10. Sg1 Se5 11. Ke1 Sc6 12. Dd1 Sb8
Mario Richter: In der Lösungsbesprechung wurde die Forderung präzisiert: Wieviele (und welche) Steine zogen in der KBP mindestens?
Die richtige Antwort ist: 6 (sSb8, wSb1, wDd1, wKe1, wSg1, wTh1).
Die kürzeste BP braucht 12 Züge von Schwarz (Sb8xLc1-f3xTg1, dann zurück nach b8), wK und wSS können nur gerade Anzahlen von Zügen machen, wegen Th1-g1 muß also wD oder wTa1 ein Tempo verlieren. In Rahmen des 12-Züge-Limits schafft das nur die wD. (2010-05-24)
Moldenhauer: Computerprüfung: C+ NUPG cooked Stelvio 1.11 1 Sekunde.
Keine Lösung: BP 11.0, BP 11.5. (2023-04-06)
comment
Die richtige Antwort ist: 6 (sSb8, wSb1, wDd1, wKe1, wSg1, wTh1).
Die kürzeste BP braucht 12 Züge von Schwarz (Sb8xLc1-f3xTg1, dann zurück nach b8), wK und wSS können nur gerade Anzahlen von Zügen machen, wegen Th1-g1 muß also wD oder wTa1 ein Tempo verlieren. In Rahmen des 12-Züge-Limits schafft das nur die wD. (2010-05-24)
Moldenhauer: Computerprüfung: C+ NUPG cooked Stelvio 1.11 1 Sekunde.
Keine Lösung: BP 11.0, BP 11.5. (2023-04-06)
comment
Keywords: Non-Unique Proof Game, Tempo Loss, Homebase (2)
Genre: Retro
FEN: rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RN1QKBN1
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-04-07 more...
Genre: Retro
FEN: rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RN1QKBN1
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-04-07 more...
1. h4 g5 2. h5 Lg7 3. Th4 Lc3 4. bxc3 Sf6 5. La3 Sd5 6. Ld6 Sf4 7. Sa3 Sh3 8. gxh3 g4 9. Lg2 g3 10. Ld5 g2 11. Sf3 g1=L 12. Kf1 Lh2 13. Kg2 Le5 14. Dg1 Lg7 15. Kg3 b5 16. Kf4 b4 17. Dg6 b3 18. Kg5 b2 19. Lb3 b1=S 20. c4 Sc3 21. Tb1 Sd5 22. Tb2 Sf6 23. Sb1 Sg8 24. Df6 Lf8
Keywords: Unique Proof Game, Homebase (S), Pronkin Theme (ls)
Genre: Retro
Computer test: Natch 2.4 Ergänzung Stelvio 1.2. Keine Lösung BP 23.0, BP 23.5.
FEN: rnbqkbnr/p1pppp1p/3B1Q2/6KP/2P4R/1B3N1P/PRPPPP2/1N6
Reprints: 46 Shortest Proof Games 11/1991
(19a) Die Schwalbe 232 08/2008
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
Genre: Retro
Computer test: Natch 2.4 Ergänzung Stelvio 1.2. Keine Lösung BP 23.0, BP 23.5.
FEN: rnbqkbnr/p1pppp1p/3B1Q2/6KP/2P4R/1B3N1P/PRPPPP2/1N6
Reprints: 46 Shortest Proof Games 11/1991
(19a) Die Schwalbe 232 08/2008
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 hxg2 5. h4 g5 6. h5 g4 7. Th4 g3 8. Sh3 g1=L 9. Lg2 Le3 10. Lc6 g2 11. dxe3 g1=T+ 12. Kf2 Tg3 13. e4 Tb3 14. axb3 f5 15. Ta6 f4 16. La4 f3 17. Kg3 f2 18. Th6 f1=D 19. Dd6 Df7 20. Lf4 Dc4 21. bxc4 a5 22. Lb3 a4 23. Da6 a3 24. Ld6 a2 25. Sf4 axb1=S 26. La2 Sc3 27. bxc3
Erstdarstellung einer Frolkin-Ceriani-Allumwandlung in einer eindeutigen KBP.
Erstdarstellung einer Frolkin-Ceriani-Allumwandlung in einer eindeutigen KBP.
Keywords: Allumwandlung, Ceriani-Frolkin Theme (dtls), Unique Proof Game, Homebase (S)
Genre: Retro
Computer test: Euclide 0.93 Ergänzung Stelvio 1.2. Keine Lösung BP 25.5, BP 26.0.
FEN: rnbqkbnr/1pppP3/Q2B3R/7P/2P1PN1R/2P3K1/B1P1P3/8
Reprints: 13 Shortest Proof Games 11/1991
(19) diagrammes 15 07-09/1994
Thema Danicum 106 2002
(B) Quartz 26 10-12/2004
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
Genre: Retro
Computer test: Euclide 0.93 Ergänzung Stelvio 1.2. Keine Lösung BP 25.5, BP 26.0.
FEN: rnbqkbnr/1pppP3/Q2B3R/7P/2P1PN1R/2P3K1/B1P1P3/8
Reprints: 13 Shortest Proof Games 11/1991
(19) diagrammes 15 07-09/1994
Thema Danicum 106 2002
(B) Quartz 26 10-12/2004
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
1. b4 c5 2. b5 Sc6 3. bxc6 b5 4. c7 La6 5. c8=L d6 6. Lf5 Tc8 7. d4 Tc6 8. d5 Db8 9. dxc6 e6 10. c7 Le7 11. c8=S Ld8 12. Se7 Lb6 13. Sg6 hxg6 14. h4 Ke7 15. h5 Kf6 16. h6 Se7 17. h7 Te8 18. h8=T gxf5 19. Th4 Sg6 20. Te4 fxe4
Cook: 1. b4 c5 2. b5 Sc6 3. bxc6 b5 4. d4 La6 5. d5 Tc8 6. d6 Tc7 7. dxc7 Db8 8. c8=L d6 9. Lf5 e6 10. h4 Ke7 11. h5 Kf6 12. c7 Le7 13. c8=S Ld8 14. Se7 Lb6 15. Sg6 Se7 16. h6 hxg6 17. h7 Te8 18. h8=T gxf5 19. Th4 Sg6 20. Te4 fxe4
Cook: 1. b4 c5 2. b5 Sc6 3. bxc6 b5 4. d4 La6 5. d5 Tc8 6. d6 Tc7 7. dxc7 Db8 8. c8=L d6 9. Lf5 e6 10. h4 Ke7 11. h5 Kf6 12. c7 Le7 13. c8=S Ld8 14. Se7 Lb6 15. Sg6 Se7 16. h6 hxg6 17. h7 Te8 18. h8=T gxf5 19. Th4 Sg6 20. Te4 fxe4
Henrik Juel: Dual: ... 4.d4 La6 5.d5 Tc8 6.d6 Tc7 7.dxc7 Db8 8.c8L d6 9.Lf5 ... (2004-02-12)
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Keywords: Ceriani-Frolkin Theme (TLS), Unique Proof Game, Homebase (W), Promotion
Genre: Retro
Computer test: Ergänzung Stelvio 1.2. Keine Lösung BP 19.0, BP 19.5.
FEN: 1q2r3/p4pp1/bb1ppkn1/1pp5/4p3/8/P1P1PPP1/RNBQKBNR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
Genre: Retro
Computer test: Ergänzung Stelvio 1.2. Keine Lösung BP 19.0, BP 19.5.
FEN: 1q2r3/p4pp1/bb1ppkn1/1pp5/4p3/8/P1P1PPP1/RNBQKBNR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
1. d3 h6 2. Lg5 hxg5 3. h4 Txh4 4. a4 Txa4 5. Th6 Sxh6 6. g4 Sxg4 7. Lg2 Sxf2 8. Lc6 Sxc6 9. d4 Sxd4 10. c4 Sxe2 11. c5 Sxg1 12. c6 dxc6 13. Dd4 Dxd4 14. Ta3 Dxb2 15. Th3 Lxh3 16. Sc3 0-0-0 17. Sd5 Txd5= patt
Henrik Juel: Black makes 15 captures.
The first 13.0 moves are correct by Euclide 1.0, but it takes some 4 minutes, so a complete test would probably take more than a day (2014-12-09)
paul: Jacobi checked the last 16 moves (in about 20 min). (2018-05-10)
Mario Richter: I would like to label this problem as a "Massacre PG", but the current definition of that term only knows of two-sided MPGs. Perhaps we could make the same differentiation as for "Homebase"?!
Btw., wasn't "popeye" best for such massacres?
rawbats confirms complete correctness of the problem after approx. 25 minutes. (2018-05-11)
Henrik Juel: Yes, Mario, Popeye is fairly good at this type
C+ by Popeye 4.61 in 57 minutes (2018-05-11)
A.Buchanan: @Mario: yes I agree it would be good to make massacre more specific. There are 69 massacres currently, almost all 2-sided, but maybe also some series-movers (unique or non-unique) which are currently not counted? (2018-05-12)
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The first 13.0 moves are correct by Euclide 1.0, but it takes some 4 minutes, so a complete test would probably take more than a day (2014-12-09)
paul: Jacobi checked the last 16 moves (in about 20 min). (2018-05-10)
Mario Richter: I would like to label this problem as a "Massacre PG", but the current definition of that term only knows of two-sided MPGs. Perhaps we could make the same differentiation as for "Homebase"?!
Btw., wasn't "popeye" best for such massacres?
rawbats confirms complete correctness of the problem after approx. 25 minutes. (2018-05-11)
Henrik Juel: Yes, Mario, Popeye is fairly good at this type
C+ by Popeye 4.61 in 57 minutes (2018-05-11)
A.Buchanan: @Mario: yes I agree it would be good to make massacre more specific. There are 69 massacres currently, almost all 2-sided, but maybe also some series-movers (unique or non-unique) which are currently not counted? (2018-05-12)
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Keywords: Unique Proof Game, Castling, Homebase (w), Rex solus (w), Massacre PG
Genre: Retro
Computer test: C+ rawbats. C+ by Popeye 4.61 in 57 minutes. C+ Stelvio 1.2 2 Sekunden. Keine Lösung: BP 16.0, BP 16.5.
FEN: 2k2b2/ppp1ppp1/2p5/3r2p1/r7/7b/1q3n2/4K1n1
Reprints: 116 Shortest Proof Games 11/1991
20a 64 Proof Games 2012
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
Genre: Retro
Computer test: C+ rawbats. C+ by Popeye 4.61 in 57 minutes. C+ Stelvio 1.2 2 Sekunden. Keine Lösung: BP 16.0, BP 16.5.
FEN: 2k2b2/ppp1ppp1/2p5/3r2p1/r7/7b/1q3n2/4K1n1
Reprints: 116 Shortest Proof Games 11/1991
20a 64 Proof Games 2012
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
7 - P0001637
Andrej N. Kornilow
Andrey Frolkin
506v Europe Echecs 364 04/1989
(16+10) C+
BP in 13,5
2 solutions
Andrej N. Kornilow
Andrey Frolkin
506v Europe Echecs 364 04/1989
(16+10) C+
BP in 13,5
2 solutions
1. Sc3 c5 2. Sd5 c4 3. Sxe7 c3 4. Sxg8 Dh4 5. Sh6 g5 6. Sxf7 Lg7 7. Se5 0-0 8. Sxd7 Lh8 9. Sxb8 Ld7 10. Sc6 Tc8 11. Sxa7 La4 12. Sb5 Tc6 13. Sa3 b5 14. Sb1
und
1. Sf3 c5 2. Se5 c4 3. Sxd7 c3 4. Sxb8 Ld7 5. Sc6 Tc8 6. Sxa7 La4 7. Sc6 b5 8. Sxe7 Tc6 9. Sxg8 Dh4 10. Sh6 g5 11. Sxf7 Lg7 12. Se5 0-0 13. Sf3 Lh8 14. Sg1
und
1. Sf3 c5 2. Se5 c4 3. Sxd7 c3 4. Sxb8 Ld7 5. Sc6 Tc8 6. Sxa7 La4 7. Sc6 b5 8. Sxe7 Tc6 9. Sxg8 Dh4 10. Sh6 g5 11. Sxf7 Lg7 12. Se5 0-0 13. Sf3 Lh8 14. Sg1
Moldenhauer: Ergänzung: Stelvio 1.2. Keine Lösungen BP 12.5, BP 13.0.
Es ist wirklich eine Rarität dass es 2 komplette Lösungen gibt. (2023-05-20)
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Es ist wirklich eine Rarität dass es 2 komplette Lösungen gibt. (2023-05-20)
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Keywords: Unique Proof Game, Homebase (W), Initial Game Array (W), Castling
Genre: Retro
Computer test: Natch 2.2 Copyright (C) 1997,98,99,2001,2002,2003 Pascal Wassong Ergänzung: Stelvio 1.2. Keine Lösungen BP 12.5, BP 13.0.
FEN: 5rkb/7p/2r5/1p4p1/b6q/2p5/PPPPPPPP/RNBQKBNR
Reprints: 569 Ukrainisches Album 1986-1990
140 Shortest Proof Games 11/1991
(10) diagrammes 15 07-09/1994
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
Genre: Retro
Computer test: Natch 2.2 Copyright (C) 1997,98,99,2001,2002,2003 Pascal Wassong Ergänzung: Stelvio 1.2. Keine Lösungen BP 12.5, BP 13.0.
FEN: 5rkb/7p/2r5/1p4p1/b6q/2p5/PPPPPPPP/RNBQKBNR
Reprints: 569 Ukrainisches Album 1986-1990
140 Shortest Proof Games 11/1991
(10) diagrammes 15 07-09/1994
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
a) 1. Ta1! 0-0? illegal 1. ... hxg6,~ 2. Ta8#
1. Tff7? hxg6!
b) 1. Tff7! h5,~ Tb8#
1. Ta1? 0-0!
In a), Schwarz muss zuletzt mit K oder T gezogen haben, deshalb s0-0 illegal.
1. Tff7? hxg6!
b) 1. Tff7! h5,~ Tb8#
1. Ta1? 0-0!
In a), Schwarz muss zuletzt mit K oder T gezogen haben, deshalb s0-0 illegal.
1. Da1! droht (unparierbar) 2. Dh8#
1. ... 0-0-0? ist illegal, da sK oder sTa8 schon gezogen haben muss
1. ... 0-0-0? ist illegal, da sK oder sTa8 schon gezogen haben muss
Keywords: Cant Castler, Castling (sg), Minimal, Miniature, Homebase
Genre: Retro, 2#
Computer test: C+ Popeye 4.61
FEN: r3k3/p1p5/Q3K3/8/8/8/8/8
Reprints: 304 Chess Strategy (Loyd) 1878
73 150 Schachkuriositäten 1910
63 Sam Loyd and his Chess Problems 1913
43 64 Schach-Scherze 1915
32 Retrograde Analysis 1915
168 Allgemeine Zeitung Chemnitz 27/11/1927
Arbeiter-Zeitung (Wien) 27/11/1932
8 Comoedia 09/07/1933
(II) Problem 37-40 09/1956
(D10) feenschach 27 04/1975
84 100 Classics of the Chessboard 1983
(7a) Die Schwalbe 145 08/1995
Thema Danicum 95 1999
52 Opfer-Opfer-Matt Gaudium 21 10/2000
Outrageous Chess Problems 2005
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2023-05-26 more...
Genre: Retro, 2#
Computer test: C+ Popeye 4.61
FEN: r3k3/p1p5/Q3K3/8/8/8/8/8
Reprints: 304 Chess Strategy (Loyd) 1878
73 150 Schachkuriositäten 1910
63 Sam Loyd and his Chess Problems 1913
43 64 Schach-Scherze 1915
32 Retrograde Analysis 1915
168 Allgemeine Zeitung Chemnitz 27/11/1927
Arbeiter-Zeitung (Wien) 27/11/1932
8 Comoedia 09/07/1933
(II) Problem 37-40 09/1956
(D10) feenschach 27 04/1975
84 100 Classics of the Chessboard 1983
(7a) Die Schwalbe 145 08/1995
Thema Danicum 95 1999
52 Opfer-Opfer-Matt Gaudium 21 10/2000
Outrageous Chess Problems 2005
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2023-05-26 more...
1. e4 h5 2. Dg4 hxg4 3. d4 Th3 4. d5 Tb3 5. Le3 b5 6. Lb6 axb6 7. h4 Ta4 8. h5 La6 9. h6 Dc8 10. h7 Db7 11. Th6 Da7 12. Tc6 dxc6 13. e5 Kd7 14. e6+ Kd6 15. exf7 Kc5 16. d6 e5 17. d7 e4 18. d8=D e3 19. Dd1 Ld6 20. f8=L g6 21. Lh6 e2 22. Lc1 Tf4 23. h8=T Kb4 24. Th1
Cook: 1. e4 h5 2. Dg4 hxg4 3. d4 Th3 4. d5 Tb3 5. Le3 b5 6. Lb6 axb6 7. h4 Ta4 8. h5 La6 9. h6 Dc8 10. h7 Db7 11. Th6 Da7 12. Tc6 dxc6 13. e5 Kd7 14. e6+ Kd6 15. exf7 Kc5 16. d6 e5 17. d7 e4 18. d8=D g6 19. Dd1 Ld6 20. f8=L e3 21. Lh6 e2 22. Lc1 Tf4 23. h8=T Kb4 24. Th1
Cook: 1. e4 h5 2. Dg4 hxg4 3. d4 Th3 4. d5 Tb3 5. Le3 b5 6. Lb6 axb6 7. h4 Ta4 8. h5 La6 9. h6 Dc8 10. h7 Db7 11. Th6 Da7 12. Tc6 dxc6 13. e5 Kd7 14. e6+ Kd6 15. exf7 Kc5 16. d6 e5 17. d7 e4 18. d8=D g6 19. Dd1 Ld6 20. f8=L e3 21. Lh6 e2 22. Lc1 Tf4 23. h8=T Kb4 24. Th1
Alfred Pfeiffer: Die Korrekturfassung 5674v mit gleicher Forderung (fs-99, S.38): 1ss5/d1b5/lbb1b1b1/1bl5/k2t2b1/2t5/BBB2BB1/TSLDKLST soll die Duale der Urfassung (4-fach mögliches Ziehen von g7-g6) nicht mehr enthalten. (2014-11-06)
Henrik Juel: The correction mentioned by Alfred is still cooked, acc. to Euclide 1.01 (2017-11-24)
Joost de Heer: For correction see P1067393. (2023-08-18)
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Henrik Juel: The correction mentioned by Alfred is still cooked, acc. to Euclide 1.01 (2017-11-24)
Joost de Heer: For correction see P1067393. (2023-08-18)
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Keywords: Unique Proof Game, Homebase (W), Pronkin Theme (DTL)
Genre: Retro
FEN: 1n4n1/q1p5/bppb2p1/1p6/1k3rp1/1r6/PPP1pPP1/RNBQKBNR
Reprints: 42 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2014-11-06 more...
Genre: Retro
FEN: 1n4n1/q1p5/bppb2p1/1p6/1k3rp1/1r6/PPP1pPP1/RNBQKBNR
Reprints: 42 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2014-11-06 more...
11 - P0002321
Samuel Loyd
Le Sphinx 1866
(16+16)
Welches ist die kürzeste Partie, die mit Patt endet?
Samuel Loyd
Le Sphinx 1866
(16+16)
Welches ist die kürzeste Partie, die mit Patt endet?
1. e3 a5 2. Dh5 Ta6 3. Dxa5 h5 4. Dxc7 Tah6 5. h4 f6 6. Dxd7+ Kf7 7. Dxb7 Dd3 8. Dxb8 Dh7 9. Dxc8 Kg6 10. De6= pat
Die (Loydsche) englische Version der Forderung zielt nicht auf Eindeutigkeit ab: "Find how a stalemate might result in ten moves."
in 'Ruy Lopez' abgedruckt in der Rubrik "Partidas de fantasia"
AB: Not quite unique alas. 4 Dxc7 & 5 h4 can be transposed. (2001-10-17)
Kostas Prentos: Besides the minor transposition, there's another totally different solution:
1.c4 d5 2.Db3 Lf5 3.Dxb7 h5 4.Dxa7 Lh7 5.Dxb8 Ta6 6.h4 Th6 7.Dxc7 f6 8.Dxd8+ Kf7 9.Dxd5+ Kg6 10.De6= with many duals, too (2002-07-03)
AB: Yes, I was referring to uniqueness of proof game to reach the diagram position. KP responds to the task which appears here as the stipulation. (2002-07-07)
Yoav Ben-Zvi: What is the most simple stipulation that makes the solution unique?
My candidate: "Shortest game ending in Stalemate, given that White has not moved a Pawn after his fourth move"
I would add the length of the composer's solution as a courtesy to solvers: "Game in less than 10.0 moves ending in Stalemate, given that White has not moved a Pawn after his fourth move" (2012-08-27)
A.Buchanan: Hi YBZ: the proof game that Kostas gave 5bnr/4p1pb/4Qpkr/7p/7P/2P5/PP1PPPP1/RNB1KBNR has 12 solutions. 1.c3 gives another 12 solutions. And there's 2 solutions for Loyd. Out of these 26 indeed only one has the property that Wh gets all pawn moves out of the way before 4th move. But it's just occurred to me that there's a variant of Loyd which begins 1.c3 and wQ develops via a4 & a5, ending with 5bnr/4p1pq/4Qpkr/7p/7P/2P5/PP1PPPP1/RNB1KBNR this has 15 solutions, and in 6 of these, Wh plays both pawn moves as moves 1 or 2. Similarly if 1.c4. This only differs from Prentos' solution in the occupant of h7. So the suggested stipulation alas wouldn't work. I am pretty sure i have seen a longer version which is sound as a PG. (2020-05-28)
A.Buchanan: See P1004131 for a longer sound PG. (2020-05-28)
Yoav Ben-Zvi: The cook noted above means that a more elaborate secondary condition is needed. My suggestion:
"PG that is shortest to end in Stalemate (less than 10.0 moves) and White plays 2 consecutive captures that are each longer than 2 squares".
An alternative is to accept the transposition:
"PG that is shortest to end in stalemate (less than 10.0 moves) and wPc2 does not move, 2 variants". (2020-06-07)
A.Buchanan: Is it known that there are no h=n.5 (or h=n half-duplex) from the game array for n9? (2022-07-13)
A.Buchanan: I read Loyd’s stipulation more as a hard task for composers than a fair ask of solvers. Loyd was a genius so of course he came up with a great answer. Adding a latter-day secondary condition to give an arbitrary uniqueness is no help to solvers, and has an aesthetic price. I imagine that Loyd’s withering reaction - as he generally favoured conceptual elegance over rigorous dual elimination. Non-unique PGs are a bit old-fashioned, but they still have their place and James Malcom proves a master at their efficient construction. I wish that YBZ was still with us to possibly contest my point, RIP. (2022-07-13)
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in 'Ruy Lopez' abgedruckt in der Rubrik "Partidas de fantasia"
AB: Not quite unique alas. 4 Dxc7 & 5 h4 can be transposed. (2001-10-17)
Kostas Prentos: Besides the minor transposition, there's another totally different solution:
1.c4 d5 2.Db3 Lf5 3.Dxb7 h5 4.Dxa7 Lh7 5.Dxb8 Ta6 6.h4 Th6 7.Dxc7 f6 8.Dxd8+ Kf7 9.Dxd5+ Kg6 10.De6= with many duals, too (2002-07-03)
AB: Yes, I was referring to uniqueness of proof game to reach the diagram position. KP responds to the task which appears here as the stipulation. (2002-07-07)
Yoav Ben-Zvi: What is the most simple stipulation that makes the solution unique?
My candidate: "Shortest game ending in Stalemate, given that White has not moved a Pawn after his fourth move"
I would add the length of the composer's solution as a courtesy to solvers: "Game in less than 10.0 moves ending in Stalemate, given that White has not moved a Pawn after his fourth move" (2012-08-27)
A.Buchanan: Hi YBZ: the proof game that Kostas gave 5bnr/4p1pb/4Qpkr/7p/7P/2P5/PP1PPPP1/RNB1KBNR has 12 solutions. 1.c3 gives another 12 solutions. And there's 2 solutions for Loyd. Out of these 26 indeed only one has the property that Wh gets all pawn moves out of the way before 4th move. But it's just occurred to me that there's a variant of Loyd which begins 1.c3 and wQ develops via a4 & a5, ending with 5bnr/4p1pq/4Qpkr/7p/7P/2P5/PP1PPPP1/RNB1KBNR this has 15 solutions, and in 6 of these, Wh plays both pawn moves as moves 1 or 2. Similarly if 1.c4. This only differs from Prentos' solution in the occupant of h7. So the suggested stipulation alas wouldn't work. I am pretty sure i have seen a longer version which is sound as a PG. (2020-05-28)
A.Buchanan: See P1004131 for a longer sound PG. (2020-05-28)
Yoav Ben-Zvi: The cook noted above means that a more elaborate secondary condition is needed. My suggestion:
"PG that is shortest to end in Stalemate (less than 10.0 moves) and White plays 2 consecutive captures that are each longer than 2 squares".
An alternative is to accept the transposition:
"PG that is shortest to end in stalemate (less than 10.0 moves) and wPc2 does not move, 2 variants". (2020-06-07)
A.Buchanan: Is it known that there are no h=n.5 (or h=n half-duplex) from the game array for n9? (2022-07-13)
A.Buchanan: I read Loyd’s stipulation more as a hard task for composers than a fair ask of solvers. Loyd was a genius so of course he came up with a great answer. Adding a latter-day secondary condition to give an arbitrary uniqueness is no help to solvers, and has an aesthetic price. I imagine that Loyd’s withering reaction - as he generally favoured conceptual elegance over rigorous dual elimination. Non-unique PGs are a bit old-fashioned, but they still have their place and James Malcom proves a master at their efficient construction. I wish that YBZ was still with us to possibly contest my point, RIP. (2022-07-13)
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Keywords: Construction task, Non-Unique Proof Game, Homebase
Genre: Retro
FEN: rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR
Reprints: The American Chess Journal , p. 18, 15/06/1876
335 Chess Strategy (Loyd) , p. 174, 1878
Ruy Lopez 3 03/1897
61-IV Sam Loyd and his Chess Problems , p. 58, 1913
61/IV Sam Loyd und seine Schachaufgaben 1926
132 Ultimate Themes 1938
6-5 De Waag 03/10/1941
R424 feenschach 21 04/1974
162 Shortest Proof Games 11/1991
Best Problems 45 2008
idee & form 159, p. 5395, 07/2023
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-08-09 more...
Genre: Retro
FEN: rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR
Reprints: The American Chess Journal , p. 18, 15/06/1876
335 Chess Strategy (Loyd) , p. 174, 1878
Ruy Lopez 3 03/1897
61-IV Sam Loyd and his Chess Problems , p. 58, 1913
61/IV Sam Loyd und seine Schachaufgaben 1926
132 Ultimate Themes 1938
6-5 De Waag 03/10/1941
R424 feenschach 21 04/1974
162 Shortest Proof Games 11/1991
Best Problems 45 2008
idee & form 159, p. 5395, 07/2023
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-08-09 more...
BTM: 1. ... Lxb7+ 2. Ke3 0-0-0 3. Sb6#
WTM: 1. Sf6+! Kd8,Kf8 2. Dc7#,Ld6#
If WTM, b000 rights are already lost. Under Keym AP, Black attempts to steal the move. White disruption of castling now counts as win for White, so the only chance is 1. … BxQb7+ 2. Ke3! thr 3. Sf6+ disrupting castling but 2. … 0-0-0 3. Sb6#. 2. Kd3,Kf5? Be4+ 3. ~ 0-0-0! as b7 is no longer occupied, or 2. Kd3,Kd4,Kd5? 0-0-0! pinning wS or 2. Ke5,Kf4? 0-0-0! as wL is blocked. As usual when flip of player to move in d#n, Black gets an extra move rather than White losing one (c.f. Codex Article 15). Sublime miniature!
WTM: 1. Sf6+! Kd8,Kf8 2. Dc7#,Ld6#
If WTM, b000 rights are already lost. Under Keym AP, Black attempts to steal the move. White disruption of castling now counts as win for White, so the only chance is 1. … BxQb7+ 2. Ke3! thr 3. Sf6+ disrupting castling but 2. … 0-0-0 3. Sb6#. 2. Kd3,Kf5? Be4+ 3. ~ 0-0-0! as b7 is no longer occupied, or 2. Kd3,Kd4,Kd5? 0-0-0! pinning wS or 2. Ke5,Kf4? 0-0-0! as wL is blocked. As usual when flip of player to move in d#n, Black gets an extra move rather than White losing one (c.f. Codex Article 15). Sublime miniature!
VL: AP after Keym. Solution:
I: 1.Sf6+.
II: Bl's try to be on move. 0... Bxb7+! 1.Ke3! O-O-O (legalizing!) 2.Sb6#. (2007-01-26)
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I: 1.Sf6+.
II: Bl's try to be on move. 0... Bxb7+! 1.Ke3! O-O-O (legalizing!) 2.Sb6#. (2007-01-26)
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Keywords: Castling (sg), a posteriori (AP) (Type Keym), Homebase (s), Aristocrat, Miniature
Genre: Retro, 2#
FEN: r1b1k3/1Q1N4/8/8/4K3/8/7B/8
Reprints: Die Schwalbe 99 06/1986
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-07-21 more...
Genre: Retro, 2#
FEN: r1b1k3/1Q1N4/8/8/4K3/8/7B/8
Reprints: Die Schwalbe 99 06/1986
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-07-21 more...
1. 0-0-0 Ke2 2. Kb8 Td1 3. Ka8 Txd8#
1. 0-0-0 0-0? usw. ist nicht erlaubt, da Weiß im letzten Zug einen schwarzen Stein geschlagen haben muss, was nur mit K oder T ging.
1. 0-0-0 0-0? usw. ist nicht erlaubt, da Weiß im letzten Zug einen schwarzen Stein geschlagen haben muss, was nur mit K oder T ging.
A.Buchanan: Tried some experiments to see if other formats of position entry are possible, but having reverted those, the solution animation no longer works. The usual PDB problem of hidden & undocumented variables between stipulation, diagrams & solution animation, sigh. (2021-04-01)
A.Buchanan: I found a "fix" - I added a bogus empty diagram b! How random! (2021-04-02)
A.Buchanan: For h#, I run Popeye without opti noca, so can see all the retro tries explicitly. For d#, I would apply opti noca if relevant, else lines of play might be blocked (2021-04-04)
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A.Buchanan: I found a "fix" - I added a bogus empty diagram b! How random! (2021-04-02)
A.Buchanan: For h#, I run Popeye without opti noca, so can see all the retro tries explicitly. For d#, I would apply opti noca if relevant, else lines of play might be blocked (2021-04-04)
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1. Kb3 Kd2 2. Ka4 Kc3 3. a2 Txa2#
Nicht 1. Kb3 0-0-0?? 2. Ka2 Td3 3. Ka1 Txa3#, da Weiß zuletzt mit K oder T gezogen hat
Nicht 1. Kb3 0-0-0?? 2. Ka2 Td3 3. Ka1 Txa3#, da Weiß zuletzt mit K oder T gezogen hat
1. ... Sf5? 2. 0-0-0?? Sd6# - aber die s0-0-0 ist illegal, den zuletzt muß Schwarz mit K oder T gezogen haben.
1. ... Sg8! 2. Td8 Sc7#
1. ... Sg8! 2. Td8 Sc7#
Mario Richter: Luboš Kekely (Slovakia) correctly points out that 1. ... Sf5! 2. 0-0-0 Sd6# is only a try and not a solution (last black move must have been by King or Rook, so the queenside castling is illegal).
I have changed the solution accordingly. (2023-03-10)
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I have changed the solution accordingly. (2023-03-10)
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*) 1. ... 0-0 2. Tf8 Tc1 3. Tf7 Tc8#
1) 1. 0-0 Tf1 2. Txf2 Txf2 3. Kh8 Tf8#
1) 1. 0-0 Tf1 2. Txf2 Txf2 3. Kh8 Tf8#
Henrik Juel: Ljubomir had an anonymous co-author?? (2021-10-31)
A.Buchanan: I've no idea. There were three users called "anonymous" of different kinds, so I merged them into one, that's all. (2021-10-31)
A.Buchanan: I think anticipated in 1948 by Peter Kniest P0003606 (2021-11-01)
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A.Buchanan: I've no idea. There were three users called "anonymous" of different kinds, so I merged them into one, that's all. (2021-10-31)
A.Buchanan: I think anticipated in 1948 by Peter Kniest P0003606 (2021-11-01)
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Keywords: Cant Castler, Castling (wksk), Homebase (w), anticipated (P0003606)
Genre: h#, Retro
FEN: 4k2r/3pp1pp/pp6/8/8/8/3PPP1P/4K2R
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-11-01 more...
Genre: h#, Retro
FEN: 4k2r/3pp1pp/pp6/8/8/8/3PPP1P/4K2R
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-11-01 more...
17 - P0003788
Zvonimir Hernitz
Vladimir Birek
Problem 41-44 03/1957
1. Preis
15. Thematurnier
(2+8) C+
h#6*
Zvonimir Hernitz
Vladimir Birek
Problem 41-44 03/1957
1. Preis
15. Thematurnier
(2+8) C+
h#6*
1. ... ... 2. Th3 f4+ 3. Kf6 f5 4. Kg7 f6+ 5. Kh8 f7 6. Th7 f8=D#
1. ... fxe3 2. Dd4 exd4+ 3. Kd6 dxc5+ 4. Kc7 c6 5. Kb8 c7+ 6. Ka8 c8=D#
Autoren Zvonko Hernitz, Zagreb & Vladimir Birek, Rijeka
PR Imre Sztankovszky, Böde
1. ... fxe3 2. Dd4 exd4+ 3. Kd6 dxc5+ 4. Kc7 c6 5. Kb8 c7+ 6. Ka8 c8=D#
Autoren Zvonko Hernitz, Zagreb & Vladimir Birek, Rijeka
PR Imre Sztankovszky, Böde
Retro-Patt, Excelsior
TLi entdeckte ein eindeutiges Satzspiel: 1. ... ... 2. Th3 f4+ 3. Kf6 f5 4. Kg7 f6+ 5. Kh8 f7 6. Th7 f8=D# mit Echo in der gegenüberliegenden Ecke!
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TLi entdeckte ein eindeutiges Satzspiel: 1. ... ... 2. Th3 f4+ 3. Kf6 f5 4. Kg7 f6+ 5. Kh8 f7 6. Th7 f8=D# mit Echo in der gegenüberliegenden Ecke!
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Keywords: Echo, Promotion (D), No legal last move for White, Minimal, Homebase
Genre: h#, Retro
Computer test: Popeye C-Version 3.52 (2048 KB)
FEN: 8/r7/8/2p1k3/4p3/3qpr2/4pP2/4K3
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-12-06 more...
Genre: h#, Retro
Computer test: Popeye C-Version 3.52 (2048 KB)
FEN: 8/r7/8/2p1k3/4p3/3qpr2/4pP2/4K3
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-12-06 more...
1. d3 ... 2. Tc2 ... 3. Tc8#
1. g4 h5 2. gxh5 d5 3. h6 Dd6 4. hxg7 Dxh2 5. gxh8=T Dxh1 6. Txh1
Duale sind möglich
Duale sind möglich
"These promoted piece games are anticipated in general idea by CMF" (TRD)
Moldenhauer: Computerprüfung: C+ KBP 5.5 cooked in 1 Sekunde.
Keine Lösung: vor BP 5.5.
Beispiellösung:1.g4 d5 2.g5 h6 3.gxh6 Dd6 4.hxg7 Ddxh2
5.gxh8=T Dxh1 6.Txh1 (2023-03-22)
comment
Moldenhauer: Computerprüfung: C+ KBP 5.5 cooked in 1 Sekunde.
Keine Lösung: vor BP 5.5.
Beispiellösung:1.g4 d5 2.g5 h6 3.gxh6 Dd6 4.hxg7 Ddxh2
5.gxh8=T Dxh1 6.Txh1 (2023-03-22)
comment
Keywords: Non-Unique Proof Game, Pronkin Theme (T), Homebase (w)
Genre: Retro
Computer test: Computerprüfung: C+ KBP 5.5 cooked in 1 Sekunde. Keine Lösung: vor BP 5.5. Beispiellösung:1.g4 d5 2.g5 h6 3.gxh6 Dd6 4.hxg7 Ddxh2 5.gxh8=T Dxh1 6.Txh1
FEN: rnb1kbn1/ppp1pp2/8/3p4/8/8/PPPPPP2/RNBQKBNR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2024-03-06 more...
Genre: Retro
Computer test: Computerprüfung: C+ KBP 5.5 cooked in 1 Sekunde. Keine Lösung: vor BP 5.5. Beispiellösung:1.g4 d5 2.g5 h6 3.gxh6 Dd6 4.hxg7 Ddxh2 5.gxh8=T Dxh1 6.Txh1
FEN: rnb1kbn1/ppp1pp2/8/3p4/8/8/PPPPPP2/RNBQKBNR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2024-03-06 more...
20 - P0005590
William Cross
Hans Hofmann
Josef Kutscher
John Niemann
Hansjörg Schiegl
Bernd Ellinghoven
(1) Die Schwalbe 25 02/1974
(16+14)
BP in 29,5
William Cross
Hans Hofmann
Josef Kutscher
John Niemann
Hansjörg Schiegl
Bernd Ellinghoven
(1) Die Schwalbe 25 02/1974
(16+14)
BP in 29,5
1. Sc3 Sh6 2. Se4 Sg8 3. Sg5 Sh6 4. Se6 Sg8 5. Sxf8 Sh6 6. Se6 Sg8 7. Sc5 Sh6 8. Sa4 Sg8 9. Sb6 Sh6 10. Sxc8 Sg8 11. Sb6 Sh6 12. Sa4 Sg8 13. b4 Sh6 14. b5 Sg8 15. b6 Sh6 16. La3 Sg8 17. Db1 Sh6 18. Kd1 Sg8 19. Kc1 Sh6 20. Kb2 Sg8 21. Kc3 Sh6 22. Kd3 Sg8 23. Ke3 Sh6 24. Kf3 Sg8 25. Kg3 Sh6 26. Kh3 Tf8 27. Dd1 Tg8 28. Lc1 Th8 29. Sc3 Sg8 30. Sb1
Konstruktionspreisausschreiben 'Die Schwalbe' 06/1973 Heft 21 S. 54,
Thema I (Dr. W. Dittmann):
Konstruiere, ausgehend von der Partieanfangsstellung, durch Versetzung von höchstens vier beliebigen Steinen eine partiemögliche Stellung mit Weiß am Zuge, deren kürzeste Beweispartie möglichst lang ist. Als Steinversetzung gilt die Postierung eines Steins auf einem anderen Feld oder auch die Entfernung eines Steins vom Brett. Gewertet wird nach der (möglichst hohen) Anzahl der Züge, die erforderlich sind, um die eingesandte Stellung von der Grundstellung aus zu erspielen.
Moldenhauer: Computerprüfung: C+ NUPG cooked Stelvio 1.11 1 Sekunde.
Keine Lösung: BP 28.5, BP 29.0.
Notation: 1.Sa3 Sa6 2.Sb5 Tb8 3.Sd4 Ta8 4.Se6 Tb8 5.Sxf8 Ta8 6.Se6 Tb8 7.Sc5 Kf8 8.Sa4 Ke8 9.Sb6 Kf8 10.Sxc8 Ke8 11.Sb6 Kf8 12.Sa4 Ke8 13.Sc3 Kf8 14.b4 Ke8 15.La3 Kf8 16.Db1 Ke8 17.Kd1 Kf8 18.Kc1 Ke8 19.Kb2 Kf8 20.Dd1 Ke8 21.Sb1 Kf8 22.Kc3 Ke8 23.Kd3 Kf8 24.Ke3 Ke8 25.Kf3 Kf8 26.Kg3 Ke8 27.Kh3 Tc8 28.Lc1 Ta8 29.b5 Sb8 30.b6 (2023-04-09)
A.Buchanan: In order to (H)C+ a non-unique proof game, one should show there is no short solution, but also that all solutions of regular length exhibit the intended theme, whatever that was. As long as any strategy can be checked for compliance, Stelvio fine because one can set the parameter for Stelvio to make sure that all strategies are considered. But it’s not possible currently to view all transpositions of a strategy, if that matters (2023-04-09)
Moldenhauer: Man müsste natürlich dieses Konstruktionsausschreiben gelesen haben was hier die Vorgabe war.
Die Stellung an sich oder der Königsmarsch oder dass die Damen und Läufer die Ursprungsposition
wieder einnehmen, usw. Stelvio wird das erreichen der Stellung analysieren so wie Euclide und Natch.
Die Bewertung auf C+ überlasse ich auch den Experten. Da fehlt mir Wissen und jahrelange Erfahrung.
Deshalb nur Kommentare. Gibt es dieses Ausschreiben von 06/1973? (2023-04-27)
Mario Richter: Thema ergänzt - hilft das bei der Bewertung? (2023-04-28)
comment
Thema I (Dr. W. Dittmann):
Konstruiere, ausgehend von der Partieanfangsstellung, durch Versetzung von höchstens vier beliebigen Steinen eine partiemögliche Stellung mit Weiß am Zuge, deren kürzeste Beweispartie möglichst lang ist. Als Steinversetzung gilt die Postierung eines Steins auf einem anderen Feld oder auch die Entfernung eines Steins vom Brett. Gewertet wird nach der (möglichst hohen) Anzahl der Züge, die erforderlich sind, um die eingesandte Stellung von der Grundstellung aus zu erspielen.
Moldenhauer: Computerprüfung: C+ NUPG cooked Stelvio 1.11 1 Sekunde.
Keine Lösung: BP 28.5, BP 29.0.
Notation: 1.Sa3 Sa6 2.Sb5 Tb8 3.Sd4 Ta8 4.Se6 Tb8 5.Sxf8 Ta8 6.Se6 Tb8 7.Sc5 Kf8 8.Sa4 Ke8 9.Sb6 Kf8 10.Sxc8 Ke8 11.Sb6 Kf8 12.Sa4 Ke8 13.Sc3 Kf8 14.b4 Ke8 15.La3 Kf8 16.Db1 Ke8 17.Kd1 Kf8 18.Kc1 Ke8 19.Kb2 Kf8 20.Dd1 Ke8 21.Sb1 Kf8 22.Kc3 Ke8 23.Kd3 Kf8 24.Ke3 Ke8 25.Kf3 Kf8 26.Kg3 Ke8 27.Kh3 Tc8 28.Lc1 Ta8 29.b5 Sb8 30.b6 (2023-04-09)
A.Buchanan: In order to (H)C+ a non-unique proof game, one should show there is no short solution, but also that all solutions of regular length exhibit the intended theme, whatever that was. As long as any strategy can be checked for compliance, Stelvio fine because one can set the parameter for Stelvio to make sure that all strategies are considered. But it’s not possible currently to view all transpositions of a strategy, if that matters (2023-04-09)
Moldenhauer: Man müsste natürlich dieses Konstruktionsausschreiben gelesen haben was hier die Vorgabe war.
Die Stellung an sich oder der Königsmarsch oder dass die Damen und Läufer die Ursprungsposition
wieder einnehmen, usw. Stelvio wird das erreichen der Stellung analysieren so wie Euclide und Natch.
Die Bewertung auf C+ überlasse ich auch den Experten. Da fehlt mir Wissen und jahrelange Erfahrung.
Deshalb nur Kommentare. Gibt es dieses Ausschreiben von 06/1973? (2023-04-27)
Mario Richter: Thema ergänzt - hilft das bei der Bewertung? (2023-04-28)
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Keywords: Non-Unique Proof Game, Construction task, Homebase
Genre: Retro
FEN: rn1qk1nr/pppppppp/1P6/8/8/7K/P1PPPPPP/RNBQ1BNR
Input: Gerd Wilts, 1995-06-05
Last update: Mario Richter, 2023-04-28 more...
Genre: Retro
FEN: rn1qk1nr/pppppppp/1P6/8/8/7K/P1PPPPPP/RNBQ1BNR
Input: Gerd Wilts, 1995-06-05
Last update: Mario Richter, 2023-04-28 more...
21 - P0005593
Hector Guillermo Zucal
Horacio Tomas Amil Meylan
(B) Die Schwalbe 25 02/1974
(16+15)
BP in 28.5
Hector Guillermo Zucal
Horacio Tomas Amil Meylan
(B) Die Schwalbe 25 02/1974
(16+15)
BP in 28.5
1. Sa3 Sa6 2. Sc4 Sb8 3. Se5 Sa6 4. Sc6 Sb8 5. Sxd8 Sa6 6. Sc6 Sb8 7. Se5 Sa6 8. Sc4 Sb8 9. b4 Sa6 10. b5 Sb8 11. b6 Sa6 12. h4 Sb8 13. h5 Sa6 14. h6 Sb8 15. La3 Sa6 16. Db1 Sb8 17. Kd1 Sa6 18. Kc1 Sb8 19. Kb2 Sa6 20. Kc3 Sb8 21. Kd3 Sa6 22. Ke3 Sb8 23. Kf3 Sa6 24. Kg3 Sb8 25. Kh2 Sa6 26. Dd1 Sb8 27. Lc1 Sa6 28. Sa3 Sb8 29. Sb1
Konstruktionsausschreiben 06/1973
Moldenhauer: Computerprüfung: Cooked Stelvio 1.11 4 Sekunden.
Keine Lösung: BP 27.5, BP 28.0, BP 29.0. BP 28.5 cooked.
Beispiel BP 29.5: 1.Sa3 Sa6 2.Sb5 Tb8 3.Sd4 Ta8 4.Sc6 Tb8 5.Sxd8 Ta8 6.Sc6 Tb8 7.Sa5 Kd8 8.Sc4 Ke8
9.b4 Kd8 10.La3 Ke8 11.Db1 Kd8 12.Kd1 Ke8 13.Kc1 Kd8 14.Kb2 Ke8 15.Kc3 Kd8 16.Kd3 Ke8 17.Ke3 Kd8
18.Kf3 Ke8 19.Kg3 Kd8 20.Dd1 Ke8 21.Lc1 Kd8 22.Sa3 Ke8 23.Sb1 Kd8 24.b5 Ke8 25.b6 Kd8 26.h4 Ke8
27.Kh2 Ta8 28.h5 Sb8 29.h6
Beispiel BP 28.5: 1.Sa3 Sa6 2.Sb5 Tb8 3.Sd4 Ta8 4.Sc6 Tb8 5.Sxd8 Ta8 6.Sc6 Tb8 7.Sa5 Kd8 8.Sc4 Ke8
9.b4 Kd8 10.La3 Ke8 11.Db1 Kd8 12.Kd1 Ke8 13.Kc1 Kd8 14.Kb2 Ke8 15.Kc3 Kd8 16.Kd3 Ke8 17.Ke3 Kd8
18.Kf3 Ke8 19.Kg3 Kd8 20.Dd1 Ke8 21.Lc1 Kd8 22.Sa3 Ke8 23.Sb1 Kd8 24.b5 Ke8 25.b6 Kd8 26.h4 Ke8
27.h5 Ta8 28.Kh2 Sb8 29.h6
Nach Konstruktionsauschreiben glaube ich wäre BP 28.5 richtig. (2023-05-12)
James Malcom: Fixed. (2023-05-13)
Henrik Juel: What was asked for in this construction tourney? (2023-05-13)
Moldenhauer: Bitte siehe P0005590, da gings schon mal darum. (2023-05-13)
comment
Moldenhauer: Computerprüfung: Cooked Stelvio 1.11 4 Sekunden.
Keine Lösung: BP 27.5, BP 28.0, BP 29.0. BP 28.5 cooked.
Beispiel BP 29.5: 1.Sa3 Sa6 2.Sb5 Tb8 3.Sd4 Ta8 4.Sc6 Tb8 5.Sxd8 Ta8 6.Sc6 Tb8 7.Sa5 Kd8 8.Sc4 Ke8
9.b4 Kd8 10.La3 Ke8 11.Db1 Kd8 12.Kd1 Ke8 13.Kc1 Kd8 14.Kb2 Ke8 15.Kc3 Kd8 16.Kd3 Ke8 17.Ke3 Kd8
18.Kf3 Ke8 19.Kg3 Kd8 20.Dd1 Ke8 21.Lc1 Kd8 22.Sa3 Ke8 23.Sb1 Kd8 24.b5 Ke8 25.b6 Kd8 26.h4 Ke8
27.Kh2 Ta8 28.h5 Sb8 29.h6
Beispiel BP 28.5: 1.Sa3 Sa6 2.Sb5 Tb8 3.Sd4 Ta8 4.Sc6 Tb8 5.Sxd8 Ta8 6.Sc6 Tb8 7.Sa5 Kd8 8.Sc4 Ke8
9.b4 Kd8 10.La3 Ke8 11.Db1 Kd8 12.Kd1 Ke8 13.Kc1 Kd8 14.Kb2 Ke8 15.Kc3 Kd8 16.Kd3 Ke8 17.Ke3 Kd8
18.Kf3 Ke8 19.Kg3 Kd8 20.Dd1 Ke8 21.Lc1 Kd8 22.Sa3 Ke8 23.Sb1 Kd8 24.b5 Ke8 25.b6 Kd8 26.h4 Ke8
27.h5 Ta8 28.Kh2 Sb8 29.h6
Nach Konstruktionsauschreiben glaube ich wäre BP 28.5 richtig. (2023-05-12)
James Malcom: Fixed. (2023-05-13)
Henrik Juel: What was asked for in this construction tourney? (2023-05-13)
Moldenhauer: Bitte siehe P0005590, da gings schon mal darum. (2023-05-13)
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Keywords: Non-Unique Proof Game, Construction task, Homebase
Genre: Retro
FEN: rnb1kbnr/pppppppp/1P5P/8/8/8/P1PPPPPK/RNBQ1BNR
Input: Gerd Wilts, 1995-06-05
Last update: James Malcom, 2023-05-13 more...
Genre: Retro
FEN: rnb1kbnr/pppppppp/1P5P/8/8/8/P1PPPPPK/RNBQ1BNR
Input: Gerd Wilts, 1995-06-05
Last update: James Malcom, 2023-05-13 more...
22 - P0006632
Anatolii Vasylenko
(2) Die Schwalbe 159, p. 364, 06/1996
2. Preis Ceriani-Gedenkturnier, 2. Abteilung
(6+2)
#2
UW-Figuren in der Diagrammstellung sind 1) zulässig 2) unzulässig
Anatolii Vasylenko
(2) Die Schwalbe 159, p. 364, 06/1996
2. Preis Ceriani-Gedenkturnier, 2. Abteilung
(6+2)
#2
UW-Figuren in der Diagrammstellung sind 1) zulässig 2) unzulässig
1) 1. Tc8 Kxf8 2. Lf6#
2) 1. ... Kxd8 2. Kf7 g6 3. Se6# 1. ... Kxf8 2. Te7 Kg8 3. Te8#
2) 1. ... Kxd8 2. Kf7 g6 3. Se6# 1. ... Kxf8 2. Te7 Kg8 3. Te8#
Henrik Juel: C+ Popeye 4.61
It is obvious that if Ld8 is not a promoted pawn then Black has the move (2021-12-26)
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It is obvious that if Ld8 is not a promoted pawn then Black has the move (2021-12-26)
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Keywords: Non-standard material, Minimal, Homebase, No legal last move for Black
Genre: Retro, 2#
FEN: 3BkN2/2R3p1/1P4K1/6P1/8/8/8/8
Reprints: 3 Problemist Yuga 3-4, p. 37, 01-06/1997
feenschach 137 08-09/2000
Input: Gerd Wilts, 1996-07-11
Last update: A.Buchanan, 2021-12-27 more...
Genre: Retro, 2#
FEN: 3BkN2/2R3p1/1P4K1/6P1/8/8/8/8
Reprints: 3 Problemist Yuga 3-4, p. 37, 01-06/1997
feenschach 137 08-09/2000
Input: Gerd Wilts, 1996-07-11
Last update: A.Buchanan, 2021-12-27 more...
BTM 1. ... axb6+ 2. Ta5! 0-0-0 3. Ta8#
2. Ta7? 0-0-0! & no mate in 1
WTM 1. Lc5! (0-0-0??) droht 2. Tf8#
2. Ta7? 0-0-0! & no mate in 1
WTM 1. Lc5! (0-0-0??) droht 2. Tf8#
VL: Published in "Probl. Pribuzh." (or "Problemy Pribusch'ja"?),
1990, No.1, #12. An obscure Russian language chess problem
magazine issued in Nikolaev, the Ukraine (the South Bug
riverside region). (2006-01-27)
A.Buchanan: Lovely problem, but this is no more PRA than it is duplex. Rather, the push/pull of AP Type Keym gives a forfeit which must be discharged. (2023-07-22)
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1990, No.1, #12. An obscure Russian language chess problem
magazine issued in Nikolaev, the Ukraine (the South Bug
riverside region). (2006-01-27)
A.Buchanan: Lovely problem, but this is no more PRA than it is duplex. Rather, the push/pull of AP Type Keym gives a forfeit which must be discharged. (2023-07-22)
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Keywords: a posteriori (AP) (Type Keym), Castling, Homebase (s), Miniature
Genre: Retro, 2#
FEN: r3k3/p6R/1B6/5R2/8/8/8/K7
Input: Gerd Wilts, 1996-12-14
Last update: A.Buchanan, 2022-02-15 more...
Genre: Retro, 2#
FEN: r3k3/p6R/1B6/5R2/8/8/8/K7
Input: Gerd Wilts, 1996-12-14
Last update: A.Buchanan, 2022-02-15 more...
1. b4 Sh6 2. b5 Sf5 3. b6 axb6 4. g4 Ta4 5. g5 Tb4 6. g6 hxg6 7. a4 Th5 8. a5 Tg5 9. a6 bxa6 10. h4 Lb7 11. h5 Dc8 12. h6 gxh6 13. f4 Sg7 14. f5 Kd8 15. f6 exf6 16. c4 Ld6 17. c5 Lf4 18. c6 dxc6 19. d4 Sd7 20. d5 Sf8 21. d6 cxd6 22. e3 Kc7 23. e4 Kb8 24. e5 Ka8 25. e6 fxe6
Alle schwarzen Bauern schlagen überkreuz.
Alle schwarzen Bauern schlagen überkreuz.
s.a. Version P1214063
Joost de Heer: Compare with P1000230. (2022-08-05)
Henrik Juel: 6 hours with Euclide 1.01 produced nothing (2022-08-05)
comment
Joost de Heer: Compare with P1000230. (2022-08-05)
Henrik Juel: 6 hours with Euclide 1.01 produced nothing (2022-08-05)
comment
Keywords: Unique Proof Game, Homebase (W), Ornament, Cross-capture
Genre: Retro
Computer test: C+ by Stelvio beta from Reto Aschwanden
FEN: k1q2n2/1b4n1/pppppppp/6r1/1r3b2/8/8/RNBQKBNR
Reprints: Die Schwalbe 181 02/2000
H29 FIDE Album 1995-1997 2004
18a 64 Proof Games 2012
Input: Gerd Wilts, 1997-01-09
Last update: A.Buchanan, 2022-11-28 more...
Genre: Retro
Computer test: C+ by Stelvio beta from Reto Aschwanden
FEN: k1q2n2/1b4n1/pppppppp/6r1/1r3b2/8/8/RNBQKBNR
Reprints: Die Schwalbe 181 02/2000
H29 FIDE Album 1995-1997 2004
18a 64 Proof Games 2012
Input: Gerd Wilts, 1997-01-09
Last update: A.Buchanan, 2022-11-28 more...
1. g4 e6 2. g5 Ke7 3. g6 Kf6 4. gxh7 Kg6 5. hxg8=S Th3 6. Se7+ Kh7 7. Sc6 dxc6 8. Lg2 Sd7 9. Ld5 Sf6 10. Lf3 Dd5 11. Lg2 Ld7 12. Lf1
A.Buchanan: I imagine that e.g. 12. ... Tc8 would allow the removal of the "exactly" limitation, which is unsavory in a tempo problem. (2018-12-12)
A.Buchanan: Yes confirmed C+ BP 12.0 after 12. ... Tc8 with Euclide 1.11. (2018-12-12)
A.Buchanan: Ronald wrote: As far as i'm concerned a game in 11 moves doesn't solve a proof game in 11.5 moves. The normal stipulation (in those days, in English) was "Position after White's 12th move. What was the game?" Which is specific and is in English, as against "PG11.5".
I happen to disagree with Ronald's position on the vexed "exactly" question, particularly for a tempo problem. But I do defend his right to retain his original stipulation associated with the problem. It is part of his creative work and as a matter of respect, scholarship and insurance it should never be over-written. There is a dependency in PDB between the animation and the diagram stipulation, which encourages over-writing. We need a unicode Originalforderung field (or maybe keyword parameter) which can contain the original stipulation in its entirety. Obviously most stipulations are unaffected, but retros are more vulnerable. Having the Originalforderung field would also free up the diagram stipulation for *greater* automation (e.g. standardization on language, helpmate, try, set play, decimal-comma-or-decimal-point, which would allow much more focused search than is available now, and a similar kind of auto-translation to what occurs in keywords and fairy pieces today). (2020-12-30)
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A.Buchanan: Yes confirmed C+ BP 12.0 after 12. ... Tc8 with Euclide 1.11. (2018-12-12)
A.Buchanan: Ronald wrote: As far as i'm concerned a game in 11 moves doesn't solve a proof game in 11.5 moves. The normal stipulation (in those days, in English) was "Position after White's 12th move. What was the game?" Which is specific and is in English, as against "PG11.5".
I happen to disagree with Ronald's position on the vexed "exactly" question, particularly for a tempo problem. But I do defend his right to retain his original stipulation associated with the problem. It is part of his creative work and as a matter of respect, scholarship and insurance it should never be over-written. There is a dependency in PDB between the animation and the diagram stipulation, which encourages over-writing. We need a unicode Originalforderung field (or maybe keyword parameter) which can contain the original stipulation in its entirety. Obviously most stipulations are unaffected, but retros are more vulnerable. Having the Originalforderung field would also free up the diagram stipulation for *greater* automation (e.g. standardization on language, helpmate, try, set play, decimal-comma-or-decimal-point, which would allow much more focused search than is available now, and a similar kind of auto-translation to what occurs in keywords and fairy pieces today). (2020-12-30)
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Keywords: Ceriani-Frolkin Theme (S), Unique Proof Game, Homebase (w), Tempo Loss (L)
Genre: Retro
Computer test: Natch 3.1 (1 sec.)
FEN: r4b2/pppb1ppk/2p1pn2/3q4/8/7r/PPPPPP1P/RNBQKBNR
Input: Gerd Wilts, 1997-05-19
Last update: A.Buchanan, 2020-12-31 more...
Genre: Retro
Computer test: Natch 3.1 (1 sec.)
FEN: r4b2/pppb1ppk/2p1pn2/3q4/8/7r/PPPPPP1P/RNBQKBNR
Input: Gerd Wilts, 1997-05-19
Last update: A.Buchanan, 2020-12-31 more...
1. Da8 2. Kb7 3. Kc6 4. Kd5 5. Ke4 6. Kf3 7. Kg2 8. Kg1 9. Dh1 10. g2 11. Lh2 12. g3 13. Lh3 14. g4 Ke2=
paul: This problem could be done as an ser-auto-stalemate (with inverted colors). (2013-04-30)
Olaf Jenkner: It's not a good idea to add another fairy condition. (2021-03-26)
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Olaf Jenkner: It's not a good idea to add another fairy condition. (2021-03-26)
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Keywords: Seriesmover, Homebase
Genre: Fairies
Computer test: Gustav 4.1d
FEN: 2k5/2bb4/8/6p1/6p1/5qp1/8/4K3
Input: Gerd Wilts, 1996-06-06
Last update: Arnold Beine, 2022-09-14 more...
Genre: Fairies
Computer test: Gustav 4.1d
FEN: 2k5/2bb4/8/6p1/6p1/5qp1/8/4K3
Input: Gerd Wilts, 1996-06-06
Last update: Arnold Beine, 2022-09-14 more...
27 - P1000177
Gianni Donati
9989 Die Schwalbe 170 04/1998
Für den Geburtstag meiner Frau Dana
1. Lob
(14+15) C+
BP in 12,0
Gianni Donati
9989 Die Schwalbe 170 04/1998
Für den Geburtstag meiner Frau Dana
1. Lob
(14+15) C+
BP in 12,0
1. Sc3 b5 2. Sd5 La6 3. Sxe7 Sxe7 4. e4 Sg6 5. e5 Ld6 6. e6 Kf8 7. e7 Kg8 8. e8=S Lg3 9. Sd6 Dh4 10. Sf5 Da4 11. Sd4 b4 12. Se2 Lxe2
Keywords: Unique Proof Game, Promotion (S), Pure Round Trip (B9), Homebase (w), Phoenix (S), Ceriani-Frolkin Theme (S), Prentos Theme (S), Tempo Loss
Genre: Retro
Computer test: (Natch 1.3 Copyright (C) 1997-1999 Pascal Wassong)
FEN: rn4kr/p1pp1ppp/6n1/8/qp6/6b1/PPPPbPPP/R1BQKBNR
Reprints: www.mathpuzzle.com
YouTube 17/02/2022
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2022-02-18 more...
Genre: Retro
Computer test: (Natch 1.3 Copyright (C) 1997-1999 Pascal Wassong)
FEN: rn4kr/p1pp1ppp/6n1/8/qp6/6b1/PPPPbPPP/R1BQKBNR
Reprints: www.mathpuzzle.com
YouTube 17/02/2022
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2022-02-18 more...
1. d4 Sa6 2. d5 Tb8 3. d6 cxd6 4. c4 Sc7 5. c5 Sa8 6. c6 dxc6 7. a4 Kd7 8. a5 Kc7 9. a6 bxa6 10. g4 Kb7 11. g5 Dc7 12. g6 hxg6 13. b4 Th4 14. b5 Tb4 15. b6 axb6 16. h4 Ka7 17. h5 Lb7 18. h6 gxh6 19. f4 Lg7 20. f5 Lxa1 21. f6 exf6 22. e4 Se7 23. e5 Sc8 24. e6 fxe6
Henrik Juel: Natch 3.1 did nothing in an hour
and neither did Euclide 1.01 (2018-12-13)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 02:33:48 Stunden.
Keine Lösung: BP 23.0, BP 23.5. (2023-02-18)
comment
and neither did Euclide 1.01 (2018-12-13)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 02:33:48 Stunden.
Keine Lösung: BP 23.0, BP 23.5. (2023-02-18)
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Keywords: Unique Proof Game, Homebase (w)
Genre: Retro
Computer test: Stelvio 1.0
FEN: nrn5/kbq5/pppppppp/8/1r6/8/8/bNBQKBNR
Reprints: 18 64 Proof Games 2012
Input: Gerd Wilts, 2000-08-01
Last update: Silvio Baier, 2023-03-02 more...
Genre: Retro
Computer test: Stelvio 1.0
FEN: nrn5/kbq5/pppppppp/8/1r6/8/8/bNBQKBNR
Reprints: 18 64 Proof Games 2012
Input: Gerd Wilts, 2000-08-01
Last update: Silvio Baier, 2023-03-02 more...
1. a4 h5 2. a5 h4 3. a6 h3 4. axb7 hxg2 5. h4 g5 6. Th3 g4 7. Td3 g3 8. Sf3 g1=S 9. Txd7 Sh3 10. Lxh3 g2 11. d3 g1=L 12. Kf1 a5 13. Se1 a4 14. f3 Le3 15. Lxe3 a3 16. Sd2 a2 17. Tc1 a1=D 18. Sb3 Da5 19. Dd2 Dc3 20. Dxc3
Moldenhauer: Computerprüfung: Cooked Stelvio 1.31 8 Sekunden.
Keine Lösung: BP 19.0.
Beispiel: 1.a4 h5 2.a5 h4 3.a6 h3 4.axb7 hxg2 5.h4 g5 6.Th3 g4 7.Td3 g3
8.Sf3 g1=S 9.Txd7 Sh3 10.Lxh3 g2 11.d3 g1=S 12.Kf1 a5 13.Se1 Sf3 14.Le3 Sd2+
15.Dxd2 a4 16.Dc3 a3 17.Sd2 a2 18.Tc1 a1=S 19.f3 Sb3 20.Sxb3 (2023-06-19)
comment
Keine Lösung: BP 19.0.
Beispiel: 1.a4 h5 2.a5 h4 3.a6 h3 4.axb7 hxg2 5.h4 g5 6.Th3 g4 7.Td3 g3
8.Sf3 g1=S 9.Txd7 Sh3 10.Lxh3 g2 11.d3 g1=S 12.Kf1 a5 13.Se1 Sf3 14.Le3 Sd2+
15.Dxd2 a4 16.Dc3 a3 17.Sd2 a2 18.Tc1 a1=S 19.f3 Sb3 20.Sxb3 (2023-06-19)
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Keywords: Unique Proof Game, Homebase
Genre: Retro
FEN: rnbqkbnr/1PpRpp2/8/8/7P/1NQPBP1B/1PP1P3/2R1NK2
Input: Gerd Wilts, 2000-08-01
Last update: Silvio Baier, 2023-08-15 more...
Genre: Retro
FEN: rnbqkbnr/1PpRpp2/8/8/7P/1NQPBP1B/1PP1P3/2R1NK2
Input: Gerd Wilts, 2000-08-01
Last update: Silvio Baier, 2023-08-15 more...
1. h4 a5 2. Th3 a4 3. Tb3 axb3 4. a4 Ta6 5. a5 Tf6 6. a6 h5 7. a7 Thh6 8. Ta6 Thg6 9. Tc6 dxc6 10. a8=T Dd4 11. Ta1 Da7 12. d4 Lg4 13. d5 Lxe2 14. d6 Lb5 15. Dg4 hxg4 16. h5 Tf3 17. h6 Sf6 18. h7 Sd5 19. h8=T f6 20. d7+ Kf7 21. d8=D Sb6 22. Dd1 Ke8 23. Th1
Henrik Juel: C+ by Euclide 1.01 also, but in just 71 seconds (2016-06-16)
Reto: C+ also by Stelvio 2.0 in under 10sec (2024-01-07)
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Reto: C+ also by Stelvio 2.0 in under 10sec (2024-01-07)
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Keywords: Unique Proof Game, Pronkin Theme (DTT), Homebase (W)
Genre: Retro
Computer test: Resolution time : 48 mn 15.33 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: 1n2kb2/qpp1p1p1/1np2pr1/1b6/6p1/1p3r2/1PP2PP1/RNBQKBNR
Input: Gerd Wilts, 2001-02-11
Last update: Alfred Pfeiffer, 2016-06-16 more...
Genre: Retro
Computer test: Resolution time : 48 mn 15.33 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: 1n2kb2/qpp1p1p1/1np2pr1/1b6/6p1/1p3r2/1PP2PP1/RNBQKBNR
Input: Gerd Wilts, 2001-02-11
Last update: Alfred Pfeiffer, 2016-06-16 more...
1. e3 Sf6 2. e4 Sxe4 3. Sa3 Sc3 4. Tb1 Sxb1 5. Sb5 Sa3 6. Sc3 Sc4 7. Sb1
Mario Richter: brauchen wir wirklich zwei verschiedene Keywords - hier "Tempoverlustmanöver", bei z.B. P1007491 hingegen "Loss of tempo"? (2018-10-21)
Henrik Juel: Good point, Mario
Other things in the never-ending Keyword discussion include:
Tempoverlustmanöver is currently called the same in english and french, and has no definitions
Loss of tempo (Tempoverlust in german) is defined as
'With White to play, a sequence of moves to reach the same position with Black to play. (Help game, abbr .: TV)'
which makes little sense in proof games
In this problem [Pe2] goes e2-e3-e4 ('wasting' a move)
In P1007491 [Pc2] similarly goes c2-c3-c4-... and [Lc8] goes (among other things) c8-b7-a6-c8 ('triangulation') (2018-10-21)
Henrik Juel: There are many solutions in 6.0 moves, like
1.Sb1-c3 Sg8-f6 2.Pe2-e4 Sf6xe4 3.Sc3-a4 Se4-c3 4.Ra1-b1 Sc3xb1 5.Sa4-c3 Sb1-a3 6.Sc3-b1 Sa3-c4
Correction: Change the stipulation to
BP in exactly 6.5 (2024-03-10)
comment
Henrik Juel: Good point, Mario
Other things in the never-ending Keyword discussion include:
Tempoverlustmanöver is currently called the same in english and french, and has no definitions
Loss of tempo (Tempoverlust in german) is defined as
'With White to play, a sequence of moves to reach the same position with Black to play. (Help game, abbr .: TV)'
which makes little sense in proof games
In this problem [Pe2] goes e2-e3-e4 ('wasting' a move)
In P1007491 [Pc2] similarly goes c2-c3-c4-... and [Lc8] goes (among other things) c8-b7-a6-c8 ('triangulation') (2018-10-21)
Henrik Juel: There are many solutions in 6.0 moves, like
1.Sb1-c3 Sg8-f6 2.Pe2-e4 Sf6xe4 3.Sc3-a4 Se4-c3 4.Ra1-b1 Sc3xb1 5.Sa4-c3 Sb1-a3 6.Sc3-b1 Sa3-c4
Correction: Change the stipulation to
BP in exactly 6.5 (2024-03-10)
comment
Keywords: Unique Proof Game, Pure Round Trip (S), Homebase (w), Tempo Losing Manouevre (weP)
Genre: Retro
Computer test: (Natch 1.3 Copyright (C) 1997-1999 Pascal Wassong)
FEN: rnbqkb1r/pppppppp/8/8/2n5/8/PPPP1PPP/1NBQKBNR
Reprints: (2) Schweizerische Schachzeitung 05/2005
Input: Gerd Wilts, 2001-02-11
Last update: A.Buchanan, 2024-03-11 more...
Genre: Retro
Computer test: (Natch 1.3 Copyright (C) 1997-1999 Pascal Wassong)
FEN: rnbqkb1r/pppppppp/8/8/2n5/8/PPPP1PPP/1NBQKBNR
Reprints: (2) Schweizerische Schachzeitung 05/2005
Input: Gerd Wilts, 2001-02-11
Last update: A.Buchanan, 2024-03-11 more...
1) 1. Tb2 0-0-0 2. Tb4 Th3#
2) 1. Kd3 Ta4 2. c3 Th3#
3) 1. Kb2 0-0 2. c3 Tfb1#
2) 1. Kd3 Ta4 2. c3 Th3#
3) 1. Kb2 0-0 2. c3 Tfb1#
VL: One solution consists of two partial ones, and there is another, castling independent, solution. A rare scenario; cf. P1091926. Presently, due to Art.16 (3) of the Codex, the mark "RV" may be deleted from the stipulation. (2017-11-25)
A.Buchanan: Methodologically, I think that one applies PRA first. So there are two parts, and each has two solutions. One solution is shared across both parts (2023-08-22)
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A.Buchanan: Methodologically, I think that one applies PRA first. So there are two parts, and each has two solutions. One solution is shared across both parts (2023-08-22)
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Keywords: Castling (wk,wg), Partial Retro Analysis (PRA), Miniature, Homebase (w)
Genre: h#, Retro
Computer test: Popeye WIN32-Version 3.56 (2048 KB)
FEN: 8/8/8/8/2p5/2k5/2r5/R3K2R
Input: Michal Dragoun, 2001-09-20
Last update: A.Buchanan, 2023-08-22 more...
Genre: h#, Retro
Computer test: Popeye WIN32-Version 3.56 (2048 KB)
FEN: 8/8/8/8/2p5/2k5/2r5/R3K2R
Input: Michal Dragoun, 2001-09-20
Last update: A.Buchanan, 2023-08-22 more...
1. h4 e6 2. Th3 Dxh4 3. Tc3 Ke7 4. Tc6 bxc6 5. b4 La6 6. Lb2 Lxe2 7. Le5 Sa6 8. Lg3 Tb8 9. f4 Tb5 10. Lf2 Th5 11. f5 g5 12. f6+ Sxf6 13. b5 Sd5 14. b6 f5 15. b7 Kf6 16. b8=T Lc5 17. Tb3 Tb8 18. Th3 Tb3 19. Th1 Tg3 20. Le3 Sb8 21. Lf4 a6 22. Ld6 La7 23. La3 Sb6 24. Lc1
wLc1 entfesselt den wBf2 auf g3 und wandert anschliessend nach c1 zurück.
wLc1 entfesselt den wBf2 auf g3 und wandert anschliessend nach c1 zurück.
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 13 Sekunden.
Keine Lösung: BP 22.5, BP 23.0. (2023-03-28)
comment
Keine Lösung: BP 22.5, BP 23.0. (2023-03-28)
comment
Keywords: Unique Proof Game, Promenade (L), Pronkin Theme (T), Homebase (w)
Genre: Retro
Computer test: Stelvio 1.11
FEN: 1n6/b1pp3p/pnp1pk2/5ppr/7q/6r1/P1PPb1P1/RNBQKBNR
Input: Gerd Wilts, 2003-05-20
Last update: A.Buchanan, 2023-06-29 more...
Genre: Retro
Computer test: Stelvio 1.11
FEN: 1n6/b1pp3p/pnp1pk2/5ppr/7q/6r1/P1PPb1P1/RNBQKBNR
Input: Gerd Wilts, 2003-05-20
Last update: A.Buchanan, 2023-06-29 more...
1. Sa3! Txa3 2. Sh3 Txh3 3. g4 Ta3 4. Lh3 Txh3 5. 0-0 Ta3 6. f4 Th3 7. Tf3 Txe2 8. Ta3 Txa3 9. h4 Th3 10. Df1 Ta3 11. Dh3 Txh3 12. a4 Ta3 13. c4 Th3 14. Ta3 Txa3 15. b4 Th3 16. La3 Txa3 17. d4 Th3 18. h5 Ta3 19. hxg6 Th3 20. f5 Ta3 21. f6 Th3 22. f7 Ta3 23. f8=D#
Anton Baumann: C+ Alybadix (2023-02-25)
Anton Baumann: BuB 'Die Schwalbe' 04/2003 S.103:
Es fehlt der Zusatz:"nach Andreas Thoma" (2023-06-05)
comment
Anton Baumann: BuB 'Die Schwalbe' 04/2003 S.103:
Es fehlt der Zusatz:"nach Andreas Thoma" (2023-06-05)
comment
Keywords: Homebase (W), Maximummer ((Doppel-)), Initial Game Array (W)
Genre: Fairies
FEN: 4r2k/8/1p4p1/8/8/7r/PPPPPPPP/RNBQKBNR
Input: Gerd Wilts, 2003-07-01
Last update: Arnold Beine, 2022-12-14 more...
Genre: Fairies
FEN: 4r2k/8/1p4p1/8/8/7r/PPPPPPPP/RNBQKBNR
Input: Gerd Wilts, 2003-07-01
Last update: Arnold Beine, 2022-12-14 more...
1. Dc7 droht 2. De7#
1. ... 0-0 2. Dg7#
aber 1. ... Th7!
Also 1. Dg7!
1. ... 0-0 2. Dg7#
aber 1. ... Th7!
Also 1. Dg7!
36 - P1012460
Andrey Frolkin
Sergiy O. Komarov
The Problemist 1/1990
2. ehrende Erwähnung
(11+7)
shc#7
Vertikaler Zylinder
Andrey Frolkin
Sergiy O. Komarov
The Problemist 1/1990
2. ehrende Erwähnung
(11+7)
shc#7
Vertikaler Zylinder
1. a5 2. a4 3. a3 4. a2 5. a1=T 6. Ta8 7. 0-0 (castling with a queenside rook!) Tg3#
The interest here is in the try 5. h1=T? 6. Th8, when, in a game to that position, the sK or sT must have moved to let out Ta8 to be captured (0-0?). The solution is a surprise, involving castling round the cylinder instead.
The interest here is in the try 5. h1=T? 6. Th8, when, in a game to that position, the sK or sT must have moved to let out Ta8 to be captured (0-0?). The solution is a surprise, involving castling round the cylinder instead.
No. 2142 HN
James Malcom: Due to the implementation of odds castling, the castling animation is off here. Is there any possible fix or circumvention? (2021-09-14)
comment
James Malcom: Due to the implementation of odds castling, the castling animation is off here. Is there any possible fix or circumvention? (2021-09-14)
comment
Keywords: Seriesmover, Consequent, Vertical Cylinder (Vertikaler), Homebase (s), Castling, Excelsior, Promotion (t)
Genre: Retro, Fairies
FEN: 4k3/pppp1p1p/1N3B2/4P3/4PK2/5R2/1PPPPP2/8
Input: Henri Nouguier, 2004-01-11
Last update: James Malcom, 2021-09-14 more...
Genre: Retro, Fairies
FEN: 4k3/pppp1p1p/1N3B2/4P3/4PK2/5R2/1PPPPP2/8
Input: Henri Nouguier, 2004-01-11
Last update: James Malcom, 2021-09-14 more...
37 - P1012898
Helmut Pönitz
Die Schwalbe 1935
(15+15) C+
(a) Welches war der letzte Zug? Weiss am Zug (b) KBP im 4,0
Helmut Pönitz
Die Schwalbe 1935
(15+15) C+
(a) Welches war der letzte Zug? Weiss am Zug (b) KBP im 4,0
b) 1. d4 Sc6 2. Lh6 Sxd4 3. Dxd4 Tb8 4. Df6 Ta8
a) R: 1. Tb8-a8
a) R: 1. Tb8-a8
Keywords: Unique Proof Game, Last Move?, Type B, Homebase (s), Switchback (t)
Genre: Retro
Computer test: HC+ Retractor 2.0 Last move? (+ manual elimination of 1 try) C+ Natch 2.3 SPG
FEN: r1bqkbnr/pppppppp/5Q1B/8/8/8/PPP1PPPP/RN2KBNR
Input: Henri Nouguier, 2004-01-11
Last update: A.Buchanan, 2021-04-14 more...
Genre: Retro
Computer test: HC+ Retractor 2.0 Last move? (+ manual elimination of 1 try) C+ Natch 2.3 SPG
FEN: r1bqkbnr/pppppppp/5Q1B/8/8/8/PPP1PPPP/RN2KBNR
Input: Henri Nouguier, 2004-01-11
Last update: A.Buchanan, 2021-04-14 more...
1. Kc7 2. Kd6 3. Ke5 (3. Ke6? 4. h8=D,T#) 4. Kf6 5. Kg7 6. Kh8 Kf7#
Keywords: Seriesmover, Minimal, Miniature, Homebase
Genre: Fairies
Computer test: Alybadix
FEN: r1K1k3/7P/8/8/8/8/8/8
Input: Hans Gruber, 2004-05-01
Last update: Arnold Beine, 2022-10-05 more...
Genre: Fairies
Computer test: Alybadix
FEN: r1K1k3/7P/8/8/8/8/8/8
Input: Hans Gruber, 2004-05-01
Last update: Arnold Beine, 2022-10-05 more...
39 - P1013968
Hans Gruber
Frank Müller
3312c Problemkiste 10/1993
Erich Bartel zum (Schachbrett-1)ten Geburtstag gewidmet
(16+16)
KBP zu einem Legal Cluster?
Kamikaze rex inklusiv
Hans Gruber
Frank Müller
3312c Problemkiste 10/1993
Erich Bartel zum (Schachbrett-1)ten Geburtstag gewidmet
(16+16)
KBP zu einem Legal Cluster?
Kamikaze rex inklusiv
0 moves
Null Züge! Denn schon die PAS ist ein Legal Cluster!
Null Züge! Denn schon die PAS ist ein Legal Cluster!
Die Autoren schreiben:
Correction:
Problemkiste, Issue 91, Februar 1994, Seite 128, Abteilung Bemerkungen & Berichtigungen
"Nr. 3212 [sic!] v.Gruber/Müller: wie HG mitteilt muß die Bedingung "KAMIKAZE REX INCLUSIV" heißen, nicht Kamikaze-Circe rex inclusiv. Letzteres wäre nicht nur ein Zuviel an Bedingungen, sondern auch noch UL, weil da auch 31-steinige Stellungen möglich sind."
Dieser Eintrag wird also mit der Korrektur aktualisiert!
Erich Bartel: Das war ein schöner Tag am 21.8.1993 bei Hans Gruber zusammen mit Frank Müller und ich bedanke mich recht herzlich für die Widmung, die mir ausgezeichnet schmeckt, fast so gut wie der super delikate Original-Zwetschgendatschi von Hansens Mutter!!!(\eb) (2007-03-04)
A.Buchanan: I don't get this: please can someone explain (2020-12-09)
Henrik Juel: Under the Kamikaze-Circe condition, where both captured and capturing man are reborn after a capture, the initial game array is legal, but removing one man gives an illegal position, so the IGA is a legal cluster
I have no info about the super delicate original Zwetschgendatschi from Hansen's mother (2020-12-09)
A.Buchanan: Hi Henrik, please clarify the rules for the middle part. Why is e.g. 1. a4 b5 axb5[sBb7] with the white pawn disappearing because it can't be reborn on occupied b2? Is it because the rebirth square for capturer is taken to be the start square not the end square of the move? That seems unlikely because I read in PDB that promotion counts before capturer's rebirth. The other possibility is that capture is illegal if the capturer cannot be reborn, but that seems inconsistent with the spirit of Kamikaze. Normally in Circe, a captured piece doesn't come back if the rebirth square is occupied. That surely would still apply here. Glossary is silent on all this. Thanks! (2020-12-09)
Henrik Juel: I think you are right, Andrew, so the IGA is not a legal cluster under Kamikaze-Circe, and the problem is cooked
In the more serious matter at hand, Zwetschgendatschi means plum cake... (2020-12-09)
A.Buchanan: I can't believe that serious fairy heavyweights such as were engaged in this problem would have made something cooked. And I still don't know what K-C actually is. I will ask HG. Maybe he has some comments on plum cake too? :-) (2020-12-09)
A.Buchanan: Henrik has also been copied on an email from Hans Gruber which states in part:
"The problem by Frank and me (PDB: P1013968) is cooked - the intended solution does not work, because the initial game array is NOT a legal cluster under Kamikaze-Circe rex inclusive. Of course this was unavoidable, as dedication problems always are unsound. We should have known that before but did not see in-how-far we were wrong. It is good to learn about that a bit more than a quarter of a century after. I dare to state, without consulting Frank, that there will be no correction to the problem. The basic idea "initial game array = legal cluster" just does not work." (2020-12-09)
Arnold Beine: Perhaps the problem can be fixed by changing the fairy condition into "Platzwechselcirce rex inklusiv". Then every position with 31 pieces is illegal and the IGA should be legal. (2020-12-09)
Henrik Juel: The problem can probably be saved just by changing the condition to Strict Kamikaze-Circe RI (2020-12-09)
A.Buchanan: What is the exact rule for Kamikaze-Circe please? And how does strict differ? (2020-12-09)
Henrik Juel: In Kamikaze-Circe, as part of a capture, the capturer is reborn if its rebirth square is empty (otherwise it vanishes), and the captured is reborn if its rebirth square is empty (otherwise it vanishes). The rebirth squares are the standard Circe ones (based on the capture square).
Strict Kamikaze-Circe additionally stipulates that a capture is possible only when both rebirth squares are empty; so the piece count never changes (2020-12-09)
A.Buchanan: Thanks Henrik: that doesn't sound very "strict" Kamikaze, sounds like "no-sharp-edges video-game" Kamikaze, where no-one actually can get hurt :) Regular Kamikaze RI is trivially a legal cluster, no? And more interestingly, ordinary Kamikaze is a legal cluster too, because if just one piece is removed, that must have been captured by the *other* king, who is still stuck in his cage. That would be my suggested fix (2020-12-10)
Henrik Juel: Yes, any condition where 31 men cannot occur in a game would do
I chose strict K-C, because that was the most simple change to K-C (2020-12-10)
A.Buchanan: Strict K-C RI the number of pieces for each side must always be the same. K RX you can certainly have 31 pieces on the board but not in game array position. It’s still very simplistic but it’s a bit more subtle (2020-12-10)
comment
Correction:
Problemkiste, Issue 91, Februar 1994, Seite 128, Abteilung Bemerkungen & Berichtigungen
"Nr. 3212 [sic!] v.Gruber/Müller: wie HG mitteilt muß die Bedingung "KAMIKAZE REX INCLUSIV" heißen, nicht Kamikaze-Circe rex inclusiv. Letzteres wäre nicht nur ein Zuviel an Bedingungen, sondern auch noch UL, weil da auch 31-steinige Stellungen möglich sind."
Dieser Eintrag wird also mit der Korrektur aktualisiert!
Erich Bartel: Das war ein schöner Tag am 21.8.1993 bei Hans Gruber zusammen mit Frank Müller und ich bedanke mich recht herzlich für die Widmung, die mir ausgezeichnet schmeckt, fast so gut wie der super delikate Original-Zwetschgendatschi von Hansens Mutter!!!(\eb) (2007-03-04)
A.Buchanan: I don't get this: please can someone explain (2020-12-09)
Henrik Juel: Under the Kamikaze-Circe condition, where both captured and capturing man are reborn after a capture, the initial game array is legal, but removing one man gives an illegal position, so the IGA is a legal cluster
I have no info about the super delicate original Zwetschgendatschi from Hansen's mother (2020-12-09)
A.Buchanan: Hi Henrik, please clarify the rules for the middle part. Why is e.g. 1. a4 b5 axb5[sBb7] with the white pawn disappearing because it can't be reborn on occupied b2? Is it because the rebirth square for capturer is taken to be the start square not the end square of the move? That seems unlikely because I read in PDB that promotion counts before capturer's rebirth. The other possibility is that capture is illegal if the capturer cannot be reborn, but that seems inconsistent with the spirit of Kamikaze. Normally in Circe, a captured piece doesn't come back if the rebirth square is occupied. That surely would still apply here. Glossary is silent on all this. Thanks! (2020-12-09)
Henrik Juel: I think you are right, Andrew, so the IGA is not a legal cluster under Kamikaze-Circe, and the problem is cooked
In the more serious matter at hand, Zwetschgendatschi means plum cake... (2020-12-09)
A.Buchanan: I can't believe that serious fairy heavyweights such as were engaged in this problem would have made something cooked. And I still don't know what K-C actually is. I will ask HG. Maybe he has some comments on plum cake too? :-) (2020-12-09)
A.Buchanan: Henrik has also been copied on an email from Hans Gruber which states in part:
"The problem by Frank and me (PDB: P1013968) is cooked - the intended solution does not work, because the initial game array is NOT a legal cluster under Kamikaze-Circe rex inclusive. Of course this was unavoidable, as dedication problems always are unsound. We should have known that before but did not see in-how-far we were wrong. It is good to learn about that a bit more than a quarter of a century after. I dare to state, without consulting Frank, that there will be no correction to the problem. The basic idea "initial game array = legal cluster" just does not work." (2020-12-09)
Arnold Beine: Perhaps the problem can be fixed by changing the fairy condition into "Platzwechselcirce rex inklusiv". Then every position with 31 pieces is illegal and the IGA should be legal. (2020-12-09)
Henrik Juel: The problem can probably be saved just by changing the condition to Strict Kamikaze-Circe RI (2020-12-09)
A.Buchanan: What is the exact rule for Kamikaze-Circe please? And how does strict differ? (2020-12-09)
Henrik Juel: In Kamikaze-Circe, as part of a capture, the capturer is reborn if its rebirth square is empty (otherwise it vanishes), and the captured is reborn if its rebirth square is empty (otherwise it vanishes). The rebirth squares are the standard Circe ones (based on the capture square).
Strict Kamikaze-Circe additionally stipulates that a capture is possible only when both rebirth squares are empty; so the piece count never changes (2020-12-09)
A.Buchanan: Thanks Henrik: that doesn't sound very "strict" Kamikaze, sounds like "no-sharp-edges video-game" Kamikaze, where no-one actually can get hurt :) Regular Kamikaze RI is trivially a legal cluster, no? And more interestingly, ordinary Kamikaze is a legal cluster too, because if just one piece is removed, that must have been captured by the *other* king, who is still stuck in his cage. That would be my suggested fix (2020-12-10)
Henrik Juel: Yes, any condition where 31 men cannot occur in a game would do
I chose strict K-C, because that was the most simple change to K-C (2020-12-10)
A.Buchanan: Strict K-C RI the number of pieces for each side must always be the same. K RX you can certainly have 31 pieces on the board but not in game array position. It’s still very simplistic but it’s a bit more subtle (2020-12-10)
comment
Keywords: Unique Proof Game, Kamikaze (RI), Initial Game Array (2), Homebase (2), Constrained problem, Legal cluster
Genre: Fairies, Retro
FEN: rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR
Input: Hans Gruber, 2004-05-01
Last update: A.Buchanan, 2020-12-22 more...
Genre: Fairies, Retro
FEN: rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR
Input: Hans Gruber, 2004-05-01
Last update: A.Buchanan, 2020-12-22 more...
40 - P1017464
Andrey Frolkin
Kostas Prentos
Messigny 05/2004
4. ehrende Erwähnung Retro-Kompositionsturnier
(13+13) C+
BP in 14,5
Andrey Frolkin
Kostas Prentos
Messigny 05/2004
4. ehrende Erwähnung Retro-Kompositionsturnier
(13+13) C+
BP in 14,5
1. a4 d5 2. Ta3 d4 3. Tf3 d3 4. g4 dxe2 5. d3 exf1=S 6. Se2 c5 7. Sg3 c4 8. Ke2 c3 9. Dxf1 cxb2 10. c4 e6 11. Sc3 b1=S 12. Dh3 Sd2 13. Te1 Sf1 14. Kxf1 e5 15. Txe5
Keywords: Ceriani-Frolkin Theme (ss), Unique Proof Game, Homebase (s)
Genre: Retro
Computer test: Natch 2.2 Copyright (C) 1997,98,99,2001,2002,2003 Pascal Wassong
FEN: rnbqkbnr/pp3ppp/8/4R3/P1P3P1/2NP1RNQ/5P1P/2B2K2
Input: Gerd Wilts, 2004-06-03
Last update: A.Buchanan, 2013-01-23 more...
Genre: Retro
Computer test: Natch 2.2 Copyright (C) 1997,98,99,2001,2002,2003 Pascal Wassong
FEN: rnbqkbnr/pp3ppp/8/4R3/P1P3P1/2NP1RNQ/5P1P/2B2K2
Input: Gerd Wilts, 2004-06-03
Last update: A.Buchanan, 2013-01-23 more...
1. Sf3 a5 2. Sd4 a4 3. Sb3 axb3 4. a4 bxc2 5. a5 cxb1=T 6. a6 Txc1 7. a7 Tc6 8. axb8=S Tf6 9. Sc6 Ta6 10. Se5 Tae6 11. Sg6 c6 12. Sxh8 Da5 13. Sg6 Kd8 14. Se5 Kc7 15. Sg4 Kd6 16. Sh6 Ke5 17. Sxg8 Kf5 18. Sh6+ Kg6 19. Sg4 b6 20. Se5+ Dxe5
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 3 Sekunden.
Keine Lösung: BP 19.0, BP 19.5. (2023-05-01)
comment
Keine Lösung: BP 19.0, BP 19.5. (2023-05-01)
comment
Keywords: Ceriani-Frolkin Theme (S), Unique Proof Game, Homebase (w)
Genre: Retro
Computer test: Stelvio 1.11
FEN: 2b2b2/3ppppp/1pp1rrk1/4q3/8/8/1P1PPPPP/R2QKB1R
Input: Gerd Wilts, 2004-06-05
Last update: Silvio Baier, 2023-08-15 more...
Genre: Retro
Computer test: Stelvio 1.11
FEN: 2b2b2/3ppppp/1pp1rrk1/4q3/8/8/1P1PPPPP/R2QKB1R
Input: Gerd Wilts, 2004-06-05
Last update: Silvio Baier, 2023-08-15 more...
1. De2! e3 2. Lb2 Ke4 3. Dd1 Ke5 4. Dxd4# 3. ... f3 4. Dxd4# 3. ... d3 4. Lxd3#
3. ... e5 4. Ld3# 3. ... e2 4. Dxe2#
1. ... d3 2. Db2+ d4 3. Db5+ d5 4. Db8#
3. ... e5 4. Ld3# 3. ... e2 4. Dxe2#
1. ... d3 2. Db2+ d4 3. Db5+ d5 4. Db8#
1. Kf2? Sd3+! 1. Ke2? Sc3+!
1. Kd2! c3+ 2. Ke2 d3+ 3. Kf2
1. Kd2! c3+ 2. Ke2 d3+ 3. Kf2
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. e4 h5 2. Dg4 hxg4 3. d4 Th3 4. d5 Tc3 5. Le3 b5 6. Lb6 axb6 7. h4 Ta4 8. h5 La6 9. h6 Dc8 10. h7 Db7 11. Th6 Da7 12. Tc6 dxc6 13. e5 Kd7 14. e6 Kd6 15. exf7 e5 16. h8=T e4 17. Th1 Ke5 18. d6 g6 19. d7 Lb4 20. d8=D La5 21. Dd1 Td4 22. f8=L b4 23. Lh6 Lb5 24. Lc1
Silvio Baier: C+ (Natch 2.4) (2009-07-15)
Henrik Juel: and no solution in 23.0 moves (Stelvio 1.4) (2023-08-18)
comment
Henrik Juel: and no solution in 23.0 moves (Stelvio 1.4) (2023-08-18)
comment
Keywords: Unique Proof Game, Homebase (w), Pronkin Theme (DTL)
Genre: Retro
Computer test: Natch 2.4
FEN: 1n4n1/q1p5/1pp3p1/bb2k3/1p1rp1p1/2r5/PPP2PP1/RNBQKBNR
Input: Gerd Wilts, 2005-01-09
Last update: A.Buchanan, 2013-01-23 more...
Genre: Retro
Computer test: Natch 2.4
FEN: 1n4n1/q1p5/1pp3p1/bb2k3/1p1rp1p1/2r5/PPP2PP1/RNBQKBNR
Input: Gerd Wilts, 2005-01-09
Last update: A.Buchanan, 2013-01-23 more...
BTM: 1. ... 0-0 2. Dh8+ Kxh8 3. Th3+ Kg8 4. Th8#
WTM: 1. Db8+! Kd7 (Ke7) 2. Dd6+ Ke8,Kc8 3. Te3#,Sa5#
If BTM, then must castle immediately to prove that it's his right, but still #3
WTM: 1. Db8+! Kd7 (Ke7) 2. Dd6+ Ke8,Kc8 3. Te3#,Sa5#
If BTM, then must castle immediately to prove that it's his right, but still #3
If we accept that this kind of AP plays with who has the move, then maybe we say that it has one solution two parts?
more ...
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more ...
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Keywords: a posteriori (AP) (Type Keym), Castling, Homebase (s)
Genre: Retro, 3#
FEN: 4k2r/5p2/8/6P1/2N5/2R5/KB5Q/8
Input: Gerd Wilts, 2005-01-09
Last update: A.Buchanan, 2022-02-15 more...
Genre: Retro, 3#
FEN: 4k2r/5p2/8/6P1/2N5/2R5/KB5Q/8
Input: Gerd Wilts, 2005-01-09
Last update: A.Buchanan, 2022-02-15 more...
1. d4 c6 2. d5 Db6 3. d6 Dc7 4. dxc7 d6 5. cxb8=S Lf5 6. Sd7 0-0-0 7. Sf6 gxf6 8. g3 Lh6 9. g4 Lf4 10. g5 Sh6 11. g6 Thg8 12. gxh7 Tg5 13. h8=S Lh7 14. Sg6 Lg8 15. Se5 dxe5
Keywords: Ceriani-Frolkin Theme (SS), Unique Proof Game, Homebase (w), Tempo Loss
Genre: Retro
Computer test: Resolution time : 1 mn 54.73 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: 2kr2b1/pp2pp2/2p2p1n/4p1r1/5b2/8/PPP1PP1P/RNBQKBNR
Input: Gerd Wilts, 2006-03-12
Last update: Mario Richter, 2022-09-16 more...
Genre: Retro
Computer test: Resolution time : 1 mn 54.73 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: 2kr2b1/pp2pp2/2p2p1n/4p1r1/5b2/8/PPP1PP1P/RNBQKBNR
Input: Gerd Wilts, 2006-03-12
Last update: Mario Richter, 2022-09-16 more...
1. Kb4 0-0-0 2. Ka3 Kc2 3. Tb4 Ta1#
Cook: Castling is illegal (W's last move)
Cook: Castling is illegal (W's last move)
VL: Castling is illegal (W's last move). (2008-11-13)
Henrik Juel: so cooked by no solution (2023-12-12)
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Henrik Juel: so cooked by no solution (2023-12-12)
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Keywords: Aristocrat, Minimal, Miniature, Homebase
Genre: h#
Computer test: (Popeye Windows-32Bit v4.47 (1200000 KB))
FEN: 1r6/8/8/1k6/8/8/8/R3K3
Input: hpr, 2008-09-07
Last update: A.Buchanan, 2023-12-12 more...
Genre: h#
Computer test: (Popeye Windows-32Bit v4.47 (1200000 KB))
FEN: 1r6/8/8/1k6/8/8/8/R3K3
Input: hpr, 2008-09-07
Last update: A.Buchanan, 2023-12-12 more...
1. f4 d5 2. f5 Le6 3. f6 Sd7 4. fxe7 f5 5. exf8=L Se7 6. a4 Sc8 7. Ld6 Dh4 8. Lg3 0-0 9. a5 Tf6 10. a6 Tg6 11. axb7 Tg5 12. b8=D g6 13. Dxa7 Kg7 14. Da2 Txa2 15. Lf2 Dxf2+
Silvio Baier: 1.f4 d5 2.f5 Le6 3.f6 Sd7 4.fe f5 5.efL Se7 6.a4 Sc8 7.Ld6 Dh4 8.Lg3 0-0 9.a5 Tf6 10.a6 Tg6 11.ab Tg5 12.b8D g6 13.D:a7 Kg7 14.Da2 T:a2 15.Lf2 D:f2+
Rundläufe zweier Bauern mit anschließendem Schlag - damit auch Ceriani-Frolkin(DL); C+ (Euclide 0.95) (2010-02-16)
paul: QB Prentos theme (2020-11-29)
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Rundläufe zweier Bauern mit anschließendem Schlag - damit auch Ceriani-Frolkin(DL); C+ (Euclide 0.95) (2010-02-16)
paul: QB Prentos theme (2020-11-29)
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Keywords: Unique Proof Game, Ceriani-Frolkin Theme (DL), Pure Round Trip (BB), Homebase (W)
Genre: Retro
Computer test: Euclide 0.95
FEN: 2n5/2pn2kp/4b1p1/3p1pr1/8/8/rPPPPqPP/RNBQKBNR
Input: Gerd Wilts, 2009-01-11
Last update: A.Buchanan, 2015-04-06 more...
Genre: Retro
Computer test: Euclide 0.95
FEN: 2n5/2pn2kp/4b1p1/3p1pr1/8/8/rPPPPqPP/RNBQKBNR
Input: Gerd Wilts, 2009-01-11
Last update: A.Buchanan, 2015-04-06 more...
1. b4 a5 2. b5 Ta6 3. bxa6[-wBa6,+wSa8] Sf6 4. Sxc7[-wSc7,+wSc6] dxc6[-sBc6,+sBa7] 5. h3 Lg4 6. hxg4[-wBg4,+wDc8] Sc6 7. De6 Dc7 8. Dd6 exd6[-sBd6,+sBd7] 9. a3 Lb4 10. axb4[-wBb4,+wLf8] Kd8 11. Lb4 axb4[-sBb4,+sBe7]
Cook: Cooked by Michel Caillaud using Jacobi demolition mode with constraints :
1.b4 c5 2.bxç5-ç4 d5 3.h3 Lg4 4.hxg4-c8=D Sc6 5.Dxa8-b8 Sf6 6.Dd6 exd6-d7 7.a3 Lb4 8.axb4-f8=L Dc7 9.Lb4 dxc4-ç5 10.Ta2 Kd8 11.Ta1 cxb4-e7
Cook: Cooked by Michel Caillaud using Jacobi demolition mode with constraints :
1.b4 c5 2.bxç5-ç4 d5 3.h3 Lg4 4.hxg4-c8=D Sc6 5.Dxa8-b8 Sf6 6.Dd6 exd6-d7 7.a3 Lb4 8.axb4-f8=L Dc7 9.Lb4 dxc4-ç5 10.Ta2 Kd8 11.Ta1 cxb4-e7
paul: The first 7 moves tested by WinChloe in 2 hours. (2019-12-15)
Henrik Juel: Jacobi 0.7.5 in Heuristic and PG demolition mode did not find the intended solution using more than 10 hours
The best attempt was 1.a4 e6 2.a5 La3 3.bxa3-f8=L Sc6 4.Ld6 cxd6-e7 5.a6 Dc7 6.axb7-b5 La6 7.bxa6-b7 Sf6 8.bxa8-d8=S Kxd8-b7 9.h3 Kc8 10.h4 Kd8 11.h5
Note the natural notation of the Take&Make moves, far better than something like 3.bxa6[-wBa6,+wSa8], which should be written as 3.bxa6-a8=S (2021-10-23)
A.Buchanan: I will copy Gerd Wilts on your notation suggestion, which doesn't work quite now here but might be made to work - I agree it's superior. (2021-10-24)
Nightrider: What a pleasure to read this! I invented take&make, and I used the natural notation (like "bxa8-d8S") right from the beginning. Isn't it ideal if readers may understand the idea of a condition immediately by the notation of the moves?
By the way, the same holds for the (much more recent) condition make&take, where a move of a wSc3 that captures a bBg8 (for example) should be written analogously as S-f6xg8. Here again, does this natural notation not make clear on the spot what the basic idea of make&take is?
(And does it not look MUCH more elegant, for both conditions, if they are written in small letters exclusively and without blanks around "&" ? For me, it was always take&make and (years later) make&take. But, de gustibus non est disputandum...) (2021-10-24)
A.Buchanan: Hi Nightrider, thanks for kind words. I did email Gerd directly after the earlier post. He's pretty busy at the moment but in a few months thinks will have more time to deal with some items on the backlog.
For names, I agree that syntax varies. Sometimes it's down to taste, more often it's just random noise. There's also the question of "&" versus "and". (StrateGems uses both in one page!) In German, nouns are always capitalized, and the rest of PDB inherits that kind of uniformity, with the idea that PDB is just applying a local pattern, not trying to be authoritative in promoting a "canonical" way of writing each term. WinChloe has similar policy: Take & Make. YACPDB has Take&MakeChess. Search engines divide up words into atoms, so when I ask google for take&make I get "Take & Make" & "Take&Make" almost equally, so Google is blind to the distinct form that you prefer. Sorry. (2021-10-24)
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Henrik Juel: Jacobi 0.7.5 in Heuristic and PG demolition mode did not find the intended solution using more than 10 hours
The best attempt was 1.a4 e6 2.a5 La3 3.bxa3-f8=L Sc6 4.Ld6 cxd6-e7 5.a6 Dc7 6.axb7-b5 La6 7.bxa6-b7 Sf6 8.bxa8-d8=S Kxd8-b7 9.h3 Kc8 10.h4 Kd8 11.h5
Note the natural notation of the Take&Make moves, far better than something like 3.bxa6[-wBa6,+wSa8], which should be written as 3.bxa6-a8=S (2021-10-23)
A.Buchanan: I will copy Gerd Wilts on your notation suggestion, which doesn't work quite now here but might be made to work - I agree it's superior. (2021-10-24)
Nightrider: What a pleasure to read this! I invented take&make, and I used the natural notation (like "bxa8-d8S") right from the beginning. Isn't it ideal if readers may understand the idea of a condition immediately by the notation of the moves?
By the way, the same holds for the (much more recent) condition make&take, where a move of a wSc3 that captures a bBg8 (for example) should be written analogously as S-f6xg8. Here again, does this natural notation not make clear on the spot what the basic idea of make&take is?
(And does it not look MUCH more elegant, for both conditions, if they are written in small letters exclusively and without blanks around "&" ? For me, it was always take&make and (years later) make&take. But, de gustibus non est disputandum...) (2021-10-24)
A.Buchanan: Hi Nightrider, thanks for kind words. I did email Gerd directly after the earlier post. He's pretty busy at the moment but in a few months thinks will have more time to deal with some items on the backlog.
For names, I agree that syntax varies. Sometimes it's down to taste, more often it's just random noise. There's also the question of "&" versus "and". (StrateGems uses both in one page!) In German, nouns are always capitalized, and the rest of PDB inherits that kind of uniformity, with the idea that PDB is just applying a local pattern, not trying to be authoritative in promoting a "canonical" way of writing each term. WinChloe has similar policy: Take & Make. YACPDB has Take&MakeChess. Search engines divide up words into atoms, so when I ask google for take&make I get "Take & Make" & "Take&Make" almost equally, so Google is blind to the distinct form that you prefer. Sorry. (2021-10-24)
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Keywords: Unique Proof Game, take&make Chess, Interchange, Ceriani-Frolkin Theme (DLS), Homebase (w)
Genre: Retro, Fairies
FEN: 3k3r/ppqppppp/2n2n2/8/8/8/2PPPPP1/RNBQKBNR
Reprints: (22) Mat Plus Review 13-14 08/2010
Input: Gerd Wilts, 2009-01-14
Last update: A.Buchanan, 2022-01-13 more...
Genre: Retro, Fairies
FEN: 3k3r/ppqppppp/2n2n2/8/8/8/2PPPPP1/RNBQKBNR
Reprints: (22) Mat Plus Review 13-14 08/2010
Input: Gerd Wilts, 2009-01-14
Last update: A.Buchanan, 2022-01-13 more...
51 - P1085286
Stanislav Vokal
The Ural's Problemist 04-06/2008
Uralski Problemist 15 JT
2. Lob
(7+3) C+
s#5
Stanislav Vokal
The Ural's Problemist 04-06/2008
Uralski Problemist 15 JT
2. Lob
(7+3) C+
s#5
1. Da3! Kd8 2. De7+ Kc8 3. Db7+ Kd8 4. Dc7+ Ke8 5. De7+ Kxe7#
Die 0-0-0 ist retroanalytisch nicht mehr zulässig.
Die 0-0-0 ist retroanalytisch nicht mehr zulässig.
1. b4 2. b5 3. b6 4. bxa7 5. axb8=L 6. La7 7. Le3 8. Lg5 9. f4 10. Kf2 11. Kg3 12. Kh4 13. g3 14. Lh3 15. Lf5 16. h3 17. Th2 18. Tf2 19. Tf3 20. Ta3 21. Txa8 22. Ta4 23. Te4 24. a4 25. a5 26. a6 27. a7 28. a8=S 29. Sb6 30. Sxc8 31. Sa7 32. Sc6 33. Sxd8 34. Se6 35. Sxf8 36. Sg6 37. Sxh8 38. Sg6 39. Se5 40. Sg4 41. Sh6 42. Sxg8 43. Sh6 44. Sg4 45. Se3 46. Sg2 47. e3 48. Se2 49. Sec3 50. Sa2 51. c3 52. Da4 53. Da8#
Frank Müller: Korrektur in Springaren 08/1997, Seite 161: ser-Beweispartie in 53 mit wDa8 (2009-11-12)
paul: Author's solution: 1. b4 2. b5 3. b6 4. ba7 5. ab8=B 6. Ba7 7. Be3 8. Bg5 9. f4 10. Kf2 11. Kg3 12. Kh4 13. g3 14. Bh3 15. Bf5 16. h3 17. Rh2 18. Rf2 19. Rf3 20. Ra3 21. Rxa8 22. Ra4 23. Re4 24. a4 25. a5 26. a6 27. a7 28. a8=N 29. Nb6 30. Nxc8 31. Na7 32. Nc6 33. Nxd8 34. Ne6 35. Nxf8 36. Ng6 37. Nxh8 38. Ng6 39. Ne5 40. Ng4 41. Nh6 42. Nxg8 43. Nh6 44. Ng4 45. Ne3 46. Ng2 47. e3 48. Ne2 49. Nec3 50. Na2 51. c3 52. Qa4 53. Qa8# (2010-05-29)
paul: See P1007350 (2010-05-29)
Henrik Juel: I believe that the year should be 1997 (2022-09-30)
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paul: Author's solution: 1. b4 2. b5 3. b6 4. ba7 5. ab8=B 6. Ba7 7. Be3 8. Bg5 9. f4 10. Kf2 11. Kg3 12. Kh4 13. g3 14. Bh3 15. Bf5 16. h3 17. Rh2 18. Rf2 19. Rf3 20. Ra3 21. Rxa8 22. Ra4 23. Re4 24. a4 25. a5 26. a6 27. a7 28. a8=N 29. Nb6 30. Nxc8 31. Na7 32. Nc6 33. Nxd8 34. Ne6 35. Nxf8 36. Ng6 37. Nxh8 38. Ng6 39. Ne5 40. Ng4 41. Nh6 42. Nxg8 43. Nh6 44. Ng4 45. Ne3 46. Ng2 47. e3 48. Ne2 49. Nec3 50. Na2 51. c3 52. Qa4 53. Qa8# (2010-05-29)
paul: See P1007350 (2010-05-29)
Henrik Juel: I believe that the year should be 1997 (2022-09-30)
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Keywords: Seriesmover, Homebase
Genre: Fairies, Retro
FEN: Q3k3/1ppppppp/8/5BB1/4RP1K/2P1P1PP/N2P2N1/RNB5
Input: hpr, 2009-11-01
Last update: A.Buchanan, 2023-06-03 more...
Genre: Fairies, Retro
FEN: Q3k3/1ppppppp/8/5BB1/4RP1K/2P1P1PP/N2P2N1/RNB5
Input: hpr, 2009-11-01
Last update: A.Buchanan, 2023-06-03 more...
53 - P1098713
Guy Sobrecases
Internet-Turnier 28/01/2010
3. Preis Weihnachtsturnier 2009, Retro
(14+14) C+
BP in 9,5
2 Varianten
Immun-Schach
Guy Sobrecases
Internet-Turnier 28/01/2010
3. Preis Weihnachtsturnier 2009, Retro
(14+14) C+
BP in 9,5
2 Varianten
Immun-Schach
1. e4 b5 2. Se2 b4 3. Sec3 bxc3 4. b4
4. ... La6 5. Lb2 cxb2 6. Sa3 b1=L 7. Txb1 Lb7 8. Tb3 a6 9. Lxa6 Lc8 10. Td3
4. ... a6 5. Lb2 cxb2 6. Sa3 b1=T 7. Lxa6 Tb3! 8. Tb1 Ta7 9. Txb3 Ta8 10. Td3
Judge Michel Caillaud: Composer succeeds in making Schnoebelen promotion less obvious, thanks to using 2 phases with 2 switchbacks as motivation. The need of a black tempo is the trick that allows differentiation of the phases (and the Schnoebelen Rook becomes an "anti-Schnoebelen" Rook!). Well done.
4. ... La6 5. Lb2 cxb2 6. Sa3 b1=L 7. Txb1 Lb7 8. Tb3 a6 9. Lxa6 Lc8 10. Td3
4. ... a6 5. Lb2 cxb2 6. Sa3 b1=T 7. Lxa6 Tb3! 8. Tb1 Ta7 9. Txb3 Ta8 10. Td3
Judge Michel Caillaud: Composer succeeds in making Schnoebelen promotion less obvious, thanks to using 2 phases with 2 switchbacks as motivation. The need of a black tempo is the trick that allows differentiation of the phases (and the Schnoebelen Rook becomes an "anti-Schnoebelen" Rook!). Well done.
Sobrecases: Specific try play:
1.Sf3? b5 2.b3 b4 3.Ba3 b×a3 4.b4 Bb7 5.S×a3?? B×f3 6.Rb1 Bc6 7.e4 a6 8.B×a6 Bb7 9.Rb3 Bc8 10. Rd3
4.?a6!? 5.S×a3 Bb7 6.Rb1 B×f3?? 7.Rb3 Bc6 8.e4 Bb7 9.B×a6 Bc8 10.Rd3 (2010-04-12)
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1.Sf3? b5 2.b3 b4 3.Ba3 b×a3 4.b4 Bb7 5.S×a3?? B×f3 6.Rb1 Bc6 7.e4 a6 8.B×a6 Bb7 9.Rb3 Bc8 10. Rd3
4.?a6!? 5.S×a3 Bb7 6.Rb1 B×f3?? 7.Rb3 Bc6 8.e4 Bb7 9.B×a6 Bc8 10.Rd3 (2010-04-12)
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Keywords: Unique Proof Game, Immune Chess, Schnoebelen Theme (TL), Prentos Theme, Ceriani-Frolkin Theme, Homebase (s)
Genre: Retro, Fairies
Computer test: Jacobi+
FEN: rnbqkbnr/2pppppp/B7/8/1P2P3/N2R4/P1PP1PPP/3QK2R
Input: Gerd Wilts, 2010-02-02
Last update: A.Buchanan, 2023-06-29 more...
Genre: Retro, Fairies
Computer test: Jacobi+
FEN: rnbqkbnr/2pppppp/B7/8/1P2P3/N2R4/P1PP1PPP/3QK2R
Input: Gerd Wilts, 2010-02-02
Last update: A.Buchanan, 2023-06-29 more...
54 - P1098720
Guy Sobrecases
Internet-Turnier 28/01/2010
3. Lob Weihnachtsturnier 2009, Retro
(15+14)
BP in 34.0
Immunschach, Alphabetschach
Guy Sobrecases
Internet-Turnier 28/01/2010
3. Lob Weihnachtsturnier 2009, Retro
(15+14)
BP in 34.0
Immunschach, Alphabetschach
1. a3 a5 2. Ta2 a4 3. Ta1 Ta5 4. Ta2 Th5 5. Ta1 b5 6. Ta2 b4 7. Ta1 b3 8. Ta2 Sc6 9. Ta1 Se5 10. Ta2 c5 11. Ta1 c4 12. Ta2 c3 13. Ta1 Lb7 14. Ta2 Lf3 15. Ta1 d5 16. Ta2 d4 17. Ta1 d3 18. Ta2 Dd4 19. Ta1 Dh4 20. Ta2 Sg6 21. Ta1 e5 22. Ta2 e4 23. Ta1 e3 24. Ta2 Ke7 25. Ta1 Kf6 26. Ta2 Lg4 27. Ta1 Kg5 28. Ta2 f5 29. Ta1 f4 30. Ta2 f3 31. Ta1 Lxa3 32. Txa3 Lh3 33. Txa4 Kh6 34. Ta1 Sf8
Judge Michel Caillaud: Additional condition allows a respectable length (not far from being a record for a C+ SPG tested by Popeye!) but also makes things easy. Game flow is nice but the trick of oscillating wRa1 is known (MC, 3rd Prize, D. Innocenti-44, 2002) and Immun condition easily helps progression of the play by blocking black Pawns.
Judge Michel Caillaud: Additional condition allows a respectable length (not far from being a record for a C+ SPG tested by Popeye!) but also makes things easy. Game flow is nice but the trick of oscillating wRa1 is known (MC, 3rd Prize, D. Innocenti-44, 2002) and Immun condition easily helps progression of the play by blocking black Pawns.
Moldenhauer: Computerprüfung: C+ Popeye 4.89 (16GB) 64Bit in 2 Min..
Keine Lösung: BP 33.5, 33.0. (2024-01-06)
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Keine Lösung: BP 33.5, 33.0. (2024-01-06)
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Keywords: Alphabetic Chess, Unique Proof Game, Immune Chess, Homebase (w)
Genre: Retro, Fairies
FEN: 5nnr/6pp/7k/7r/7q/1ppppp1b/1PPPPPPP/RNBQKBNR
Input: Gerd Wilts, 2010-02-02
Last update: A.Buchanan, 2023-06-29 more...
Genre: Retro, Fairies
FEN: 5nnr/6pp/7k/7r/7q/1ppppp1b/1PPPPPPP/RNBQKBNR
Input: Gerd Wilts, 2010-02-02
Last update: A.Buchanan, 2023-06-29 more...
55 - P1109633
Nicolas Dupont
Unto Heinonen
Juha M. Saukkola
Ronald Schäfer
Martin Walter
Göran Wicklund
(B) Die Schwalbe 233 10/2008
(12+12) C+
BP in 6,5
Schlagschach
Nicolas Dupont
Unto Heinonen
Juha M. Saukkola
Ronald Schäfer
Martin Walter
Göran Wicklund
(B) Die Schwalbe 233 10/2008
(12+12) C+
BP in 6,5
Schlagschach
1. h4 b6 2. h5 La6 3. h6 Lxe2 4. hxg7 Lxf1 5. gxh8=T Lxg2 6. Txh7 Lxh1 7. Txh1
Keywords: Unique Proof Game, Pronkin Theme (T), Losing Chess, Homebase (w)
Genre: Retro, Fairies
Computer test: Popeye Windows-32Bit v4.51 (1024 KB)
FEN: rn1qkbn1/p1pppp2/1p6/8/8/8/PPPP1P2/RNBQK1NR
Input: Gerd Wilts, 2010-07-03
Last update: A.Buchanan, 2013-04-20 more...
Genre: Retro, Fairies
Computer test: Popeye Windows-32Bit v4.51 (1024 KB)
FEN: rn1qkbn1/p1pppp2/1p6/8/8/8/PPPP1P2/RNBQK1NR
Input: Gerd Wilts, 2010-07-03
Last update: A.Buchanan, 2013-04-20 more...
1. d4 b5 2. d5 b4 3. Dd4 b3 4. Dxg7 bxc2 5. Dxh8 cxb1=S 6. Dxg8 Sc3 7. Dxf7 Sxd5 8. Dxe7 Sxe7 9. a3 Sg8
paul: Checked by Jacobi 0.7.5 (2021-02-09)
James Malcom: So C+? (2021-02-09)
James Malcom: I'll assume so. (2021-02-10)
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James Malcom: So C+? (2021-02-09)
James Malcom: I'll assume so. (2021-02-10)
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Keywords: Unique Proof Game, Pronkin Theme (s), Losing Chess, Homebase (s)
Genre: Retro, Fairies
FEN: rnbqkbn1/p1pp3p/8/8/8/P7/1P2PPPP/R1B1KBNR
Input: Gerd Wilts, 2010-07-03
Last update: A.Buchanan, 2021-04-08 more...
Genre: Retro, Fairies
FEN: rnbqkbn1/p1pp3p/8/8/8/P7/1P2PPPP/R1B1KBNR
Input: Gerd Wilts, 2010-07-03
Last update: A.Buchanan, 2021-04-08 more...
1. b8=S Kxd8 2. Te1 Kxc8 3. Te8# ( 1. ... Kf8 2. Tg1 Ke8 3. Tg8# )
1. c7 Kf8 2. c8=S Ke8 3. Tg8#
1. ... Ke7 2. c8=D Kd6 3. Dc5#
1. ... Ke7 2. c8=D Kd6 3. Dc5#
Keywords: Miniature Collection (0345062), Miniature, Homebase, under-promotion (S)
Genre: 3#
FEN: 4k3/8/2P1P1R1/1K6/8/8/8/8
Input: Zuncke/Bruder, 2010-09-11
Last update: Rainer Staudte, 2021-10-18 more...
Genre: 3#
FEN: 4k3/8/2P1P1R1/1K6/8/8/8/8
Input: Zuncke/Bruder, 2010-09-11
Last update: Rainer Staudte, 2021-10-18 more...
1. De6 Kd8 2. Kc6 Ke8 3. Dg8#
1. ... Kf8 2. Dg6 e5 3. Lc5#
1. ... Kf8 2. Dg6 e5 3. Lc5#
B12L m
SCHRECKE: C+, popeye 4.87 (2021-11-13)
Mario Richter: Ich vermute, daß es sich bei der Quelle 'Den schachmat' nicht wie in der sources-Tabelle abgegeben, um eine deutsche Publikation handelt, sondern um den "Internationalen Tag des Schachs" ("Mezhdunarodnyy den' Schachmat", "International Chess Day") (2021-11-14)
comment
SCHRECKE: C+, popeye 4.87 (2021-11-13)
Mario Richter: Ich vermute, daß es sich bei der Quelle 'Den schachmat' nicht wie in der sources-Tabelle abgegeben, um eine deutsche Publikation handelt, sondern um den "Internationalen Tag des Schachs" ("Mezhdunarodnyy den' Schachmat", "International Chess Day") (2021-11-14)
comment
1. Se1! Kf8 2. Sf3 Ke8 3. Se5 Kd8 4. Ta8#
1. ... Kd8 2. Sd3 Kc8 3. Ta8+ Kd7 4. Sc5#
1. ... Kd8 2. Sd3 Kc8 3. Ta8+ Kd7 4. Sc5#
1. c7! Kxd7 2. c8=S Ke8 3. Lc6#
Keywords: Miniature Collection (0045165), Miniature, Homebase, Flight giving sacrifice key, Rook sacrifice, Model mate, under-promotion (wS), Rex solus
Genre: 3#
Computer test: SCHRECKE: popeye 4.87
FEN: 1K2k3/1B1RP3/2P5/6N1/8/8/8/8
Input: Felber, Volker, 2010-09-11
Last update: Dieter Berlin, 2023-11-22 more...
Genre: 3#
Computer test: SCHRECKE: popeye 4.87
FEN: 1K2k3/1B1RP3/2P5/6N1/8/8/8/8
Input: Felber, Volker, 2010-09-11
Last update: Dieter Berlin, 2023-11-22 more...
1. e5 Kd7 2. Db5+ Kd8 3. Se6#
1. ... Kd8 2. Dh7 Ke8 3. De7#
1. ... Kf7 2. Dg6+ Kf8 3. Se6#
1. ... Kf8 2. Dh7 Ke8 3. De7#
1. ... Kd8 2. Dh7 Ke8 3. De7#
1. ... Kf7 2. Dg6+ Kf8 3. Se6#
1. ... Kf8 2. Dh7 Ke8 3. De7#
1. c8=S! Kxd8 2. Tf8#
Keywords: Miniature Collection (0309741), Miniature, Homebase, under-promotion key (S), Stalemate avoidance, Rex solus, Flight giving sacrifice key
Genre: 2#
Computer test: SCHRECKE: popeye 4.89
FEN: 3Bk3/2P5/2K5/8/8/8/8/5R2
Input: Zuncke/Bruder, 2010-09-11
Last update: Dieter Berlin, 2024-01-26 more...
Genre: 2#
Computer test: SCHRECKE: popeye 4.89
FEN: 3Bk3/2P5/2K5/8/8/8/8/5R2
Input: Zuncke/Bruder, 2010-09-11
Last update: Dieter Berlin, 2024-01-26 more...
1. d3 Ke7 2. d4 Ke8 3. d5 Ke7 4. d6+ Ke8 5. d7+ Ke7 6. Kc6 Kxd8 7. Lf6#
1. Lc3! Kf7 2. Lh5+ Kg8 3. f7#
1. ... Kd8 2. La5+
1. ... Kd8 2. La5+
1. Lc4! Sd7 2. Lb5 Kf7 3. Lxd7
1. ... Sa6 2. Lxa6 Kf7 3. Lb5
1. ... Sc6 2. Lb5 Kf7 3. Lxc6
1. ... Sa6 2. Lxa6 Kf7 3. Lb5
1. ... Sc6 2. Lb5 Kf7 3. Lxc6
Keywords: Miniature Collection (0330339), Miniature, Minimal (b), Aristocrat, Homebase
Genre: n#
Computer test: SCHRECKE: Gustav 4.2e
FEN: 1n2kN2/7N/4BB2/8/8/3K4/8/8
Input: Felber, Volker, 2010-09-11
Last update: Dieter Berlin, 2023-10-10 more...
Genre: n#
Computer test: SCHRECKE: Gustav 4.2e
FEN: 1n2kN2/7N/4BB2/8/8/3K4/8/8
Input: Felber, Volker, 2010-09-11
Last update: Dieter Berlin, 2023-10-10 more...
1. ... Kxd7 2. Db7+ Ke8 3. Sd6#
1. ... Kxe7 2. Df5 Ke8 3. De6#
1. ... Kxf7 2. Dh7+ Ke8 3. Sf6#
1. Df5? Kxe7 2. De6# (but BTM)
1. ... Kxe7 2. Df5 Ke8 3. De6#
1. ... Kxf7 2. Dh7+ Ke8 3. Sf6#
1. Df5? Kxe7 2. De6# (but BTM)
RA2 e423 3m
A.Buchanan: I think this is the true original, not Haas 1976. It is basically the same whether L or B on 7th rank, whether K on d5 or e5, whether everything is shifted by files, whether (if L on 7th) board rotated. (2021-10-06)
Henrik Juel: I agree that P1142901 is anticipated by this problem
And this is also slightly more economical
Haas is not to blame, because the problem section in Skakbladet was not very prominent in 1970
I expect that Hilding tried to fool unwary solvers (2021-10-06)
Henrik Juel: Some old issues of Skakbladet are available at https://skakbladet.skak.dk/ (move the cursor to Arkiv at the top of the page), but issues from 1963 to 1999 are not (yet) available, so I cannot document the details of Hilding's problem (2021-10-06)
A.Buchanan: No worries about Haas or Skakbladet, Henrik. Like probably hundreds of others, Hilding's problem had the correct solution, but as marked neither as G="retro" nor k="No legal last move for Black". I've flipped a bunch of these tonight, but have run out of energy. (2021-10-06)
Henrik Juel: Thanks for your effort, Andrew (2021-10-06)
A.Buchanan: You're very welcome Henrik. Article 15 is my second favourite convention, so I am happy to have identified 146(!) in the last 24 hours that were lurking unrecognized in PDB. I was looking for g='2#' and sol='3.' so I also managed to fix typos etc in about 100 false positives. (2021-10-07)
Henrik Juel: My goodness me
I cannot handle even my old task of just testing; only thanks to Michael S, who is now doing the lion's share, we are just scraping by in the testing department
Tiny typo here in the try: 2.De6#, not 3. (2021-10-07)
comment
A.Buchanan: I think this is the true original, not Haas 1976. It is basically the same whether L or B on 7th rank, whether K on d5 or e5, whether everything is shifted by files, whether (if L on 7th) board rotated. (2021-10-06)
Henrik Juel: I agree that P1142901 is anticipated by this problem
And this is also slightly more economical
Haas is not to blame, because the problem section in Skakbladet was not very prominent in 1970
I expect that Hilding tried to fool unwary solvers (2021-10-06)
Henrik Juel: Some old issues of Skakbladet are available at https://skakbladet.skak.dk/ (move the cursor to Arkiv at the top of the page), but issues from 1963 to 1999 are not (yet) available, so I cannot document the details of Hilding's problem (2021-10-06)
A.Buchanan: No worries about Haas or Skakbladet, Henrik. Like probably hundreds of others, Hilding's problem had the correct solution, but as marked neither as G="retro" nor k="No legal last move for Black". I've flipped a bunch of these tonight, but have run out of energy. (2021-10-06)
Henrik Juel: Thanks for your effort, Andrew (2021-10-06)
A.Buchanan: You're very welcome Henrik. Article 15 is my second favourite convention, so I am happy to have identified 146(!) in the last 24 hours that were lurking unrecognized in PDB. I was looking for g='2#' and sol='3.' so I also managed to fix typos etc in about 100 false positives. (2021-10-07)
Henrik Juel: My goodness me
I cannot handle even my old task of just testing; only thanks to Michael S, who is now doing the lion's share, we are just scraping by in the testing department
Tiny typo here in the try: 2.De6#, not 3. (2021-10-07)
comment
Keywords: Miniature Collection (0311347), No legal last move for Black, Miniature, Homebase
Genre: 2#, Retro
FEN: 4k3/3NPN2/8/3K4/8/8/8/1Q6
Input: Zuncke/Bruder, 2010-09-11
Last update: A.Buchanan, 2021-10-08 more...
Genre: 2#, Retro
FEN: 4k3/3NPN2/8/3K4/8/8/8/1Q6
Input: Zuncke/Bruder, 2010-09-11
Last update: A.Buchanan, 2021-10-08 more...
1. Sd8! Kxd8 2. Ke6 Ke8 3. Tc8#
1. ... Kf8 2. Tg5 Ke8 3. Tg8#
vgl. Bemerkung in der Wiener Schach-Zeitung zu P1132737.
1. ... Kf8 2. Tg5 Ke8 3. Tg8#
vgl. Bemerkung in der Wiener Schach-Zeitung zu P1132737.
Keywords: Miniature Collection (0292083), Aristocrat, Miniature, Homebase, Rex solus, Flight giving sacrifice key, Opferminimal
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 4k3/8/3KN3/2R5/8/8/8/8
Input: Felber, Volker, 2010-09-11
Last update: Dieter Berlin, 2024-03-10 more...
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 4k3/8/3KN3/2R5/8/8/8/8
Input: Felber, Volker, 2010-09-11
Last update: Dieter Berlin, 2024-03-10 more...
1. Th7!
Keywords: Miniature Collection (0016600), Aristocrat, Miniature, Homebase, Rex solus
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 4k3/3N2R1/3K4/8/8/8/8/8
Input: Felber, Volker, 2010-09-11
Last update: Dieter Berlin, 2024-01-01 more...
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 4k3/3N2R1/3K4/8/8/8/8/8
Input: Felber, Volker, 2010-09-11
Last update: Dieter Berlin, 2024-01-01 more...
1. Lf4 exf4 2. Sf3+ Kh1 3. Lh3 g2 4. Kf2 g1=D+ 5. Sxg1 f3 6. Lf1 Kh2 7. Sxf3+ Kh1 8. Lg2#
1. Th5! Kf4 2. Se2+ Ke4 3. Lg2+ Ke3,Kd3 4. Tc5 ... 5. Tc3#
2. ... Ke3 3. Lg2 Kd3,g3 4. Tc5 ... 5. Tc3# 2. ... Kf3 3. Kd2 g3 4. Th4 ... 5. Tf4#
2. ... Ke3 3. Lg2 Kd3,g3 4. Tc5 ... 5. Tc3# 2. ... Kf3 3. Kd2 g3 4. Th4 ... 5. Tf4#
1. Ta4! droht 2. Th3#
1. ... Kd3 2. Th2 Ke3 3. Th3#
1. ... Kf3 2. Tg1 Ke3 3. Tg3#
1. ... Kd3 2. Th2 Ke3 3. Th3#
1. ... Kf3 2. Tg1 Ke3 3. Tg3#
1. Dd6!
1. Td1! Kf7 2. Kf5 Kg8 3. Kg6 Kh8 4. Td8#
2. ... Ke8 3. Td8+ Kf7 4. Tf8#
2. ... Ke8 3. Td8+ Kf7 4. Tf8#
1. Kf5! Kd8 2. La5+ Ke8 3. Kg6 Kf8 4. Lf7 e5 5. Lb4#
1. ... Kf8 2. Kg6 Ke8 3. La5 Kf8 4. Lf7 e5 5. Lb4#
1. ... Kf8 2. Kg6 Ke8 3. La5 Kf8 4. Lf7 e5 5. Lb4#
Keywords: Miniature Collection (0324615), Minimal (b), Miniature, Homebase, Model mate
Genre: n#
Computer test: SCHRECKE: Gustav 4.2d
FEN: 4k3/4p3/4B3/4K3/8/8/8/4B3
Input: Zuncke/Bruder, 2010-09-12
Last update: Dieter Berlin, 2024-03-23 more...
Genre: n#
Computer test: SCHRECKE: Gustav 4.2d
FEN: 4k3/4p3/4B3/4K3/8/8/8/4B3
Input: Zuncke/Bruder, 2010-09-12
Last update: Dieter Berlin, 2024-03-23 more...
1. Sge7! Kf8 2. Le3 Ke8 3. Sd6+
1. ... Kd8 2. Sd6 Kc7 3. La7 Kd8 4. Lb6#
1. ... Kd8 2. Sd6 Kc7 3. La7 Kd8 4. Lb6#
Keywords: Miniature Collection (0338991), Aristocrat, Miniature, Homebase
Genre: n#
FEN: 4k1N1/8/4K3/2B2N2/8/8/8/8
Input: Zuncke/Bruder, 2010-09-12
Last update: Gunter Jordan, 2023-11-08 more...
Genre: n#
FEN: 4k1N1/8/4K3/2B2N2/8/8/8/8
Input: Zuncke/Bruder, 2010-09-12
Last update: Gunter Jordan, 2023-11-08 more...
1. Sb6! Kf8 2. Kf6 Ke8 3. Sg5 Kd8 4. Se6+ Ke8 5. Lg6#
Keywords: Miniature Collection (0078921), Aristocrat, Miniature, Homebase, Flight-giving key, Rex solus
Genre: n#
Computer test: SCHRECKE: Gustav 4.2e
FEN: 4k3/3N1N1B/4K3/8/8/8/8/8
Input: Felber, Volker, 2010-09-12
Last update: Dieter Berlin, 2023-12-02 more...
Genre: n#
Computer test: SCHRECKE: Gustav 4.2e
FEN: 4k3/3N1N1B/4K3/8/8/8/8/8
Input: Felber, Volker, 2010-09-12
Last update: Dieter Berlin, 2023-12-02 more...
a) 1. Kd6! Kd8 2. Tf8#
b) 1. Tc5! Ke8 2. Tc8#
b) 1. Tc5! Ke8 2. Tc8#
T12-2 IM
vf: a1=a2, Dasni, Minimat, 1995;
c1=a1, Morgan, British Chess Magazine, 1969;
c) Speckmann, 1976, Mattaufgaben mit drei und vier Steinen
Alfred Pfeiffer: Genre: #2 (2010-09-14)
Felber, Volker: Schwalbe nur Teil a) (2011-09-20)
Henrik Juel: C+ Popeye 4.61 (2021-03-27)
comment
vf: a1=a2, Dasni, Minimat, 1995;
c1=a1, Morgan, British Chess Magazine, 1969;
c) Speckmann, 1976, Mattaufgaben mit drei und vier Steinen
Alfred Pfeiffer: Genre: #2 (2010-09-14)
Felber, Volker: Schwalbe nur Teil a) (2011-09-20)
Henrik Juel: C+ Popeye 4.61 (2021-03-27)
comment
Keywords: Miniature Collection (0021412), Aristocrat, Minimal, Miniature, Homebase
Genre: 2#
FEN: 4k3/8/4K3/5R2/8/8/8/8
Reprints: 4 Die Schwalbe 125, p. 290, 05/1938
1325 Problemista 140-144 05-09/1973
Input: Felber, Volker, 2010-09-12
Last update: Marcin Banaszek, 2021-03-27 more...
Genre: 2#
FEN: 4k3/8/4K3/5R2/8/8/8/8
Reprints: 4 Die Schwalbe 125, p. 290, 05/1938
1325 Problemista 140-144 05-09/1973
Input: Felber, Volker, 2010-09-12
Last update: Marcin Banaszek, 2021-03-27 more...
1. ... Kxd8 2. Dc4 Ke8 3. Dc8#
1. ... Kxf8 2. Dg4 Ke8 3. Dg8#
1. De5!? but Black to move
1. ... Kxf8 2. Dg4 Ke8 3. Dg8#
1. De5!? but Black to move
Keywords: Miniature Collection (0312472), No legal last move for Black, Miniature, Homebase
Genre: 2#, Retro
Computer test: C+ Popeye 4.61 after obvious analysis
FEN: 3BkN2/8/4K3/8/8/2P3P1/4Q3/8
Input: Zuncke/Bruder, 2010-09-12
Last update: A.Buchanan, 2023-08-17 more...
Genre: 2#, Retro
Computer test: C+ Popeye 4.61 after obvious analysis
FEN: 3BkN2/8/4K3/8/8/2P3P1/4Q3/8
Input: Zuncke/Bruder, 2010-09-12
Last update: A.Buchanan, 2023-08-17 more...
* 1. ... 0-0-0 2. Dc3#
1. Dh7! droht 2. Dxg8#
1. ... 0-0-0 2. Dc2#
1. ... Sh6,Sf6 2. De7#
1. ... Kf8 2. Df7#
1. ... Kd8 2. Dd7#
1. Dh7! droht 2. Dxg8#
1. ... 0-0-0 2. Dc2#
1. ... Sh6,Sf6 2. De7#
1. ... Kf8 2. Df7#
1. ... Kd8 2. Dd7#
1. Dh7! droht 2. Dxg8#
1. ... 0-0-0 2. Dc2#
1. ... Kd8 2. Dd7#
1. ... Kf8 2. Df7#
1. ... Se7,S~ 2. Dxe7#
1. ... 0-0-0 2. Dc2#
1. ... Kd8 2. Dd7#
1. ... Kf8 2. Df7#
1. ... Se7,S~ 2. Dxe7#
1. Lf3! Kf8 2. Lh5 Ke8 3. Kg7#
Keywords: Miniature Collection (0340534), Aristocrat, Miniature, Homebase, Rex solus
Genre: 3#
Computer test: SCHRECKE: popeye 4.89
FEN: 4k3/8/1N3BKN/8/4B3/8/8/8
Input: Zuncke/Bruder, 2010-09-12
Last update: Dieter Berlin, 2023-11-09 more...
Genre: 3#
Computer test: SCHRECKE: popeye 4.89
FEN: 4k3/8/1N3BKN/8/4B3/8/8/8
Input: Zuncke/Bruder, 2010-09-12
Last update: Dieter Berlin, 2023-11-09 more...
1. Sd4! Kf8 2. Tc7 Ke8 3. Lf7+
1. ... Kd8 2. Se6+ Kc8 3. Ta7 Kb8 4. Ta8#
1. ... Kd8 2. Se6+ Kc8 3. Ta7 Kb8 4. Ta8#
A12SS3 3m
1 NL
SCHRECKE: 2. Lösung
1. Sb4 Kd8 2. Lc6 Kc8 3. Sd5 Kd8 4. Tb8#
1. ... Kf8 2. Sc6 Ke8 3. Tg7 Kf8 4. Tg8#
Diese Lösung ist im Gegensatz zu 1. Sd4 eindeutig und scheint eher die geplante zu sein. (2024-03-24)
comment
1 NL
SCHRECKE: 2. Lösung
1. Sb4 Kd8 2. Lc6 Kc8 3. Sd5 Kd8 4. Tb8#
1. ... Kf8 2. Sc6 Ke8 3. Tg7 Kf8 4. Tg8#
Diese Lösung ist im Gegensatz zu 1. Sd4 eindeutig und scheint eher die geplante zu sein. (2024-03-24)
comment
Keywords: Miniature Collection (0085292), Aristocrat, Miniature, Homebase, Rex solus
Genre: n#
FEN: 4k3/1R6/8/3B4/8/8/2N5/7K
Input: Felber, Volker, 2010-09-12
Last update: Dieter Berlin, 2024-03-24 more...
Genre: n#
FEN: 4k3/1R6/8/3B4/8/8/2N5/7K
Input: Felber, Volker, 2010-09-12
Last update: Dieter Berlin, 2024-03-24 more...
1. Sd7! Kxd7 2. Kg6
1. ... Kf7 2. Ld5+ Ke8 3. Sf6#
1. ... Kf7 2. Ld5+ Ke8 3. Sf6#
1. Sd8! Kxe7 2. Tb8 Ke8,Kf8 3. Sc6#
86 - P1176382
Peter Fayers
v The Problemist 2007
4. ehrende Erwähnung, Abteilung 2
(12+7) cooked
BP in 9,0
Annan Schach
Peter Fayers
v The Problemist 2007
4. ehrende Erwähnung, Abteilung 2
(12+7) cooked
BP in 9,0
Annan Schach
1. Bh2xh7 Bg7-h5 2. Bh7xSg8=L Lf8-h6 3. Lg8xf7+ Ke8xf7 4. Bd2xd7 Th8-e8 5. Bd7xTe8=T Lc8-e6 6. Te8xBe7+ Dd8xTe7 7. Ba2xBa7 Lxe2 8. axb8=S Ta6 9. Sxa6 Lxa6
François Labelle: Cooked by Jacobi:
5... Lg4 6.axa7 Lxe2 7.axb8=S Ta6 8.Sxa6 Lxa6 9.Txe7+ Dxe7+
The cook is also quickly found by Popeye when testing the last 4.5 moves with a=b4.5 (with every version of Popeye that I have installed). (2019-02-09)
paul: Actually, bpPh5 must be in f5, with 1. ...Pg7-f5 in solution. But still cooked: 1.dxd7+ exd7 2.hxh7 df5 3.hxg8=Q Be6 4.Qxh8 Qe7 5.Qxg7 Bxe2 6.Qxf7+ Kxf7 7.axa7 Bh6 8.axb8=S Ra6 9.Sxa6 Bxa6+. (2022-08-17)
comment
5... Lg4 6.axa7 Lxe2 7.axb8=S Ta6 8.Sxa6 Lxa6 9.Txe7+ Dxe7+
The cook is also quickly found by Popeye when testing the last 4.5 moves with a=b4.5 (with every version of Popeye that I have installed). (2019-02-09)
paul: Actually, bpPh5 must be in f5, with 1. ...Pg7-f5 in solution. But still cooked: 1.dxd7+ exd7 2.hxh7 df5 3.hxg8=Q Be6 4.Qxh8 Qe7 5.Qxg7 Bxe2 6.Qxf7+ Kxf7 7.axa7 Bh6 8.axb8=S Ra6 9.Sxa6 Bxa6+. (2022-08-17)
comment
Keywords: Annan Chess, Ceriani-Frolkin Theme (TLS), Unique Proof Game, Homebase (w)
Genre: Retro, Fairies
FEN: 8/1pp1qk2/b6b/7p/8/8/1PP2PP1/RNBQKBNR
Reprints: The Problemist , p. 490, 09/2010
Input: Gerd Wilts, 2010-09-11
Last update: A.Buchanan, 2023-06-29 more...
Genre: Retro, Fairies
FEN: 8/1pp1qk2/b6b/7p/8/8/1PP2PP1/RNBQKBNR
Reprints: The Problemist , p. 490, 09/2010
Input: Gerd Wilts, 2010-09-11
Last update: A.Buchanan, 2023-06-29 more...
1. Sf3 f5 2. Se5 f4 3. Sxd7 f3 4. Sb6 Dd5 5. Sxa8 Kd7 6. Sc3 Kc6 7. Se4 Kb5 8. Sg5 Ka4 9. Sh3 b5 10. Sg1 Lh3 11. Tb1 e6 12. Ta1 Lc5 13. Tb1 Lb6 14. Ta1 c5 15. Sc7 Se7 16. Se8 Tf8 17. Sd6 Tf5 18. Sc4 Th5 19. Sa3 g5 20. Sb1 Sg6
Keywords: Unique Proof Game, Homebase (W), Pendulum (T x4), Interchange (SS), Initial Game Array (W)
Genre: Retro
Computer test: Euclide 0.93, ©2000-2002 Étienne Dupuis
FEN: 1n6/p6p/1b2p1n1/1ppq2pr/k7/5p1b/PPPPPPPP/RNBQKBNR
Input: Gerd Wilts, 2010-12-30
Last update: James Malcom, 2023-05-02 more...
Genre: Retro
Computer test: Euclide 0.93, ©2000-2002 Étienne Dupuis
FEN: 1n6/p6p/1b2p1n1/1ppq2pr/k7/5p1b/PPPPPPPP/RNBQKBNR
Input: Gerd Wilts, 2010-12-30
Last update: James Malcom, 2023-05-02 more...
1.Sc3 f5 2.Se4 fxe4-g3 3.Sf3 gxh2-h3 4.Sg5 hxg2-g3 5.Rh6 gxf2-f3 6.Bh3 fxe2-e3 7.Kf1 exd2-d3 8.Bf4 dxc2-c3 9.Rc1 cxb2-b3 10.Rc6 bxa2-a4 11.Qb3 axb3-f7
Keywords: take&make Chess, Homebase (s), Unique Proof Game
Genre: Retro, Fairies
Computer test: Jacobi+
FEN: rnbqkbnr/pppppppp/2R4R/6N1/5B2/7B/8/5K2
Input: Nikolai Beluhov, 2011-01-09
Last update: A.Buchanan, 2021-11-24 more...
Genre: Retro, Fairies
Computer test: Jacobi+
FEN: rnbqkbnr/pppppppp/2R4R/6N1/5B2/7B/8/5K2
Input: Nikolai Beluhov, 2011-01-09
Last update: A.Buchanan, 2021-11-24 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)
more ...
comment
more ...
comment
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. Sc5 2. Se4 3. Sf2 4. Lg3 0-0
Keywords: Haaner Chess, Seriesmover, Move Length Record, Aristocrat, Minimal, Miniature, Homebase
Genre: Fairies
Computer test: popeye 4.87
FEN: 8/8/n7/8/5k2/8/7b/4K2R
Input: Uwe Mehlhorn, 2011-03-08
Last update: Arnold Beine, 2022-10-17 more...
Genre: Fairies
Computer test: popeye 4.87
FEN: 8/8/n7/8/5k2/8/7b/4K2R
Input: Uwe Mehlhorn, 2011-03-08
Last update: Arnold Beine, 2022-10-17 more...
1. Sd4! Tg8 2. Tc8+ Kd7 3. Sf6+ Kd6 4. Lh2+ Tg3 5. Dg6 hxg6#
1. ... Tf8 2. Tc8+ Kd7 3. b8=S+ Kd6 4. Sb5+ Kxd5 5. Df5+ Txf5#
Korrektur in Jelinek: Victory through Defeat 2004 (Nr. 67)
1. ... Tf8 2. Tc8+ Kd7 3. b8=S+ Kd6 4. Sb5+ Kxd5 5. Df5+ Txf5#
Korrektur in Jelinek: Victory through Defeat 2004 (Nr. 67)
Keywords: Castling position (s), Homebase
Genre: s#
FEN: 4k2r/1PR1P2p/7P/3B1N1K/P5NP/8/2Q1R3/6B1
Input: Frank Müller, 2011-03-13
Last update: Marcin Banaszek, 2021-10-17 more...
Genre: s#
FEN: 4k2r/1PR1P2p/7P/3B1N1K/P5NP/8/2Q1R3/6B1
Input: Frank Müller, 2011-03-13
Last update: Marcin Banaszek, 2021-10-17 more...
1. Ld3 Kc1 2. Se2+ Kb1 3. 0-0#
"smallwares"
Rochade aus weißer Homebase [he]. < [EZ].
SCHRECKE: C+, popeye 4.85 (2020-11-30)
comment
Rochade aus weißer Homebase [he]. < [EZ].
SCHRECKE: C+, popeye 4.85 (2020-11-30)
comment
Keywords: Castling (wk), Fabel-Opus (84), Homebase (w)
Genre: 3#
FEN: 8/8/8/8/8/8/pppP1PPP/bk2KBNR
Reprints: 23 Kurioses Schach 1975
Input: Mario Richter, 2011-12-03
Last update: Mario Richter, 2020-11-30 more...
Genre: 3#
FEN: 8/8/8/8/8/8/pppP1PPP/bk2KBNR
Reprints: 23 Kurioses Schach 1975
Input: Mario Richter, 2011-12-03
Last update: Mario Richter, 2020-11-30 more...
Keywords: Symmetrical position, Homebase (s), Variation Asymmetry, corner to corner (D), Model mate
Genre: 3#
FEN: 4k3/1pp3pp/4K3/8/4P3/3P1P2/2P1Q1P1/8
Reprints: 69 Kurioses Schach 1975
Input: Mario Richter, 2012-01-06
Last update: Gunter Jordan, 2023-07-05 more...
Genre: 3#
FEN: 4k3/1pp3pp/4K3/8/4P3/3P1P2/2P1Q1P1/8
Reprints: 69 Kurioses Schach 1975
Input: Mario Richter, 2012-01-06
Last update: Gunter Jordan, 2023-07-05 more...
1. Ta3 Tg2 2. Tg3 Kf2 3. 0-0+ Kxg3 4. Tf4 Kxf4 5. Dg5+ Kxg5 6. Kh8 Kh6=
Keywords: Aristocrat, Minimal, Miniature, Homebase
Genre: Fairies
Computer test: A. Baumann: Gustav 4.2a
FEN: r2qk2r/8/8/8/8/8/5R2/4K3
Input: hpr, 2012-09-29
Last update: Dieter Berlin, 2024-01-24 more...
Genre: Fairies
Computer test: A. Baumann: Gustav 4.2a
FEN: r2qk2r/8/8/8/8/8/5R2/4K3
Input: hpr, 2012-09-29
Last update: Dieter Berlin, 2024-01-24 more...
1. a4 h5 2. Ta3 h4 3. Tg3 h3 4. Txg7 hxg2 5. Txg8 gxh1=T 6. Txh8 Txg1 7. Th3 Tg8 8. Lg2 Th8
PR M.Caillaud: A Pronkin Rook. By nature, a Pronkin is a long travel by a Pawn. Many have been produced. In this one, guessing the theme from the diagram is not obvious.
Mario Richter: The award says "SPG 8,0", but since
1. a4 h5 2. Ta3 h4 3. Tg3 h3 4. Txg7 hxg2 5. Txg8 gxh1=D 6. Tg3 Dxg1 7. Th3 Dg2 8. Lxg2
does the job too, the problem is either cooked or the stipulation is something like "PG in exact 8.0". (2012-10-02)
Björn Enemark: A correction: with wRh3 at a5 and wBg2 at f1 there is no short solution.
1.a4 h5 2.Ta3 h4 3.Tg3 h3 4.Txg7 hxg2 5.Txg8 gxh1=T 6.Txh8 Txg1 7.Th5 Tg8 8.Ta5 Th8 (2012-10-21)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 1 Sekunde.
Keine Lösung: BP 7.0, BP 7.5, BP 8.5.
Notation 1. Zeile ist korrekt. (2023-02-21)
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Mario Richter: The award says "SPG 8,0", but since
1. a4 h5 2. Ta3 h4 3. Tg3 h3 4. Txg7 hxg2 5. Txg8 gxh1=D 6. Tg3 Dxg1 7. Th3 Dg2 8. Lxg2
does the job too, the problem is either cooked or the stipulation is something like "PG in exact 8.0". (2012-10-02)
Björn Enemark: A correction: with wRh3 at a5 and wBg2 at f1 there is no short solution.
1.a4 h5 2.Ta3 h4 3.Tg3 h3 4.Txg7 hxg2 5.Txg8 gxh1=T 6.Txh8 Txg1 7.Th5 Tg8 8.Ta5 Th8 (2012-10-21)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 1 Sekunde.
Keine Lösung: BP 7.0, BP 7.5, BP 8.5.
Notation 1. Zeile ist korrekt. (2023-02-21)
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Keywords: Unique Proof Game, Pronkin Theme (t), Champagne-TT (2012), Homebase (s)
Genre: Retro
Computer test: Stelvio 1.0
FEN: rnbqkb1r/pppppp2/8/8/P7/7R/1PPPPPBP/1NBQK3
Input: Mario Richter, 2012-10-02
Last update: A.Buchanan, 2023-06-29 more...
Genre: Retro
Computer test: Stelvio 1.0
FEN: rnbqkb1r/pppppp2/8/8/P7/7R/1PPPPPBP/1NBQK3
Input: Mario Richter, 2012-10-02
Last update: A.Buchanan, 2023-06-29 more...
1. a4 f5 2. a5 f4 3. a6 f3 4. axb7 fxe2 5. Sf3 exd1=L 6. La6 h5 7. d3 h4 8. Lg5 h3 9. Sbd2 hxg2 10. h4 g1=L 11. Th3 Lh2 12. Sxh2 Lf3 13. Txf3 e5 14. 0-0-0 La3 15. bxa3 e4 16. Kb2 e3 17. Kb3 e2 18. Ka4 e1=L 19. Sb3 Lb4 20. Td2 Lf8
Keywords: Unique Proof Game, Homebase (s), Prentos Theme (ll), Pronkin Theme (l)
Genre: Retro
Computer test: Euclide 1.01
FEN: rnbqkbnr/pPpp2p1/B7/6B1/K6P/PN1P1R2/2PR1P1N/8
Input: Gerd Wilts, 2012-10-03
Last update: Arnold Beine, 2021-07-25 more...
Genre: Retro
Computer test: Euclide 1.01
FEN: rnbqkbnr/pPpp2p1/B7/6B1/K6P/PN1P1R2/2PR1P1N/8
Input: Gerd Wilts, 2012-10-03
Last update: Arnold Beine, 2021-07-25 more...
1. d4 h6 2. Lg5 hxg5 3. h4 Txh4 4. g4 Txg4 5. Th6 b5 6. Tb6 axb6 7. a4 Txa4 8. Lg2 Taxd4 9. Ta6 Sxa6 10. b4 Sxb4 11. Ld5 Sxd5 12. f4 Sxf4 13. Dd3 d5 14. Df5 Lxf5 15. c4 Lxb1 16. e4 dxe4 17. Sf3 Dd5 18. Se5 Dxc4 19. Sd7 Kxd7
Henrik Juel: Natch 3.1 made no visible progress for half an hour (2018-12-15)
paul: The first 16 moves tested by Jacobi (in about 10 hours) (2020-12-08)
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paul: The first 16 moves tested by Jacobi (in about 10 hours) (2020-12-08)
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Keywords: Unique Proof Game, Homebase (w), Rex solus (w)
Genre: Retro
Computer test: Stelvio 1.17, 14sec
FEN: 5bn1/2pkppp1/1p6/1p4p1/2qrpnr1/8/8/1b2K3
Reprints: 20 64 Proof Games 2012
Input: Gerd Wilts, 2012-12-23
Last update: Reto, 2023-04-17 more...
Genre: Retro
Computer test: Stelvio 1.17, 14sec
FEN: 5bn1/2pkppp1/1p6/1p4p1/2qrpnr1/8/8/1b2K3
Reprints: 20 64 Proof Games 2012
Input: Gerd Wilts, 2012-12-23
Last update: Reto, 2023-04-17 more...
1. e6 Lf4 2. Ke7 Lxc7 3. De8 Lxb8 4. Kd8 Lxa7 5. Le7 Lb6#
1. f4 e5 2. fxe5 Sf6 3. exf6 Ld6 4. fxg7 Lxh2 5. gxh8=L Lxg1 6. Txh7 Le3 7. Txf7 Lxd2+ 8. Dxd2 a5 9. Dxa5 Kxf7 10. Dxc7 Dxh8 11. Dxc8 De8 12. Dxe8+ Kxe8
Die Schwalbe 12/2013
MRi: "Nach dem ersten, naturgemäs schlaglosen Zug muss Weiß im Rest der Partie permanent schlagen. Dass sich gleich drei weiße Steine aktiv an dieser Fresserei beteiligen, kommt ebenso überraschend wie der Schnoebelen-Läufer auf h8, den man beim bloßen Blick auf die Endstellung wohl kaum erwartet hätte. Netter (Computer?!)-Fund im Bereich der At-Home-BPs."
HG: Siehe Kommentar zu 15609; hier mit Schnoebelen-Läufer, sK-Rückhehr und sD-Opferzug."
SBa zu 15069 und 15611: "Das dürften die ersten orthodoxen Doppelhomebase it Schnoebelenumwandungen sein. 156909 ist inbesondere weben des genialen Tempozugs Ke7, der die eigentliche Begründung der Umwandlung liefert, viel besser, die andere errinerte eher an Massakerbeweispartien, Nichesdestotrotz will das erstmal konstruiert sein.
A.Buchanan: @Mario: no computer: found by hand over the course of several evenings on a business trip to Mumbai, but I take the suspicion as a compliment! :D (2021-07-18)
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MRi: "Nach dem ersten, naturgemäs schlaglosen Zug muss Weiß im Rest der Partie permanent schlagen. Dass sich gleich drei weiße Steine aktiv an dieser Fresserei beteiligen, kommt ebenso überraschend wie der Schnoebelen-Läufer auf h8, den man beim bloßen Blick auf die Endstellung wohl kaum erwartet hätte. Netter (Computer?!)-Fund im Bereich der At-Home-BPs."
HG: Siehe Kommentar zu 15609; hier mit Schnoebelen-Läufer, sK-Rückhehr und sD-Opferzug."
SBa zu 15069 und 15611: "Das dürften die ersten orthodoxen Doppelhomebase it Schnoebelenumwandungen sein. 156909 ist inbesondere weben des genialen Tempozugs Ke7, der die eigentliche Begründung der Umwandlung liefert, viel besser, die andere errinerte eher an Massakerbeweispartien, Nichesdestotrotz will das erstmal konstruiert sein.
A.Buchanan: @Mario: no computer: found by hand over the course of several evenings on a business trip to Mumbai, but I take the suspicion as a compliment! :D (2021-07-18)
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Keywords: Unique Proof Game, Homebase (2), Schnoebelen Theme (L), Switchback (k), Ceriani-Frolkin Theme (L), Prentos Theme (L)
Genre: Retro
FEN: rn2k3/1p1p4/8/8/8/8/PPP1P1P1/RNB1KB2
Input: Mario Richter, 2013-07-20
Last update: A.Buchanan, 2021-07-18 more...
Genre: Retro
FEN: rn2k3/1p1p4/8/8/8/8/PPP1P1P1/RNB1KB2
Input: Mario Richter, 2013-07-20
Last update: A.Buchanan, 2021-07-18 more...
a) 1. f2+ Ke2 2. f1=T a4 3. Tf8 Ta3 4. Tg8 Th3#
b) 1. Kg7 Sc3 2. Kf6 0-0-0 3. Ke5 Te1+ 4. Kd4 Te4#
b) 1. Kg7 Sc3 2. Kf6 0-0-0 3. Ke5 Te1+ 4. Kd4 Te4#
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The problems of this query have been registered by the following contributors:
Gerd Wilts (49)Michal Dragoun (1)
Henri Nouguier (3)
Hans Gruber (2)
Brian Stephenson (2)
hpr (3)
Frank Müller (2)
Zuncke/Bruder (14)
Felber, Volker (16)
Nikolai Beluhov (1)
YM (1)
Uwe Mehlhorn (1)
Mario Richter (4)
Klaus Funk (1)
Als Vergleichsaufgaben sind in der 'Schwalbe' angegeben: G. Schweig (P0002287), Mortimer (P1394750), W. Naef & H. Klüver (P0002832)
A.Buchanan: It's curious that if we shift sK to e8 (i.e. make the position fully homebase) then it is sound as BP in 6.0! The magic of homebase! :) I don't know if it was a typo - maybe someone can check the magazine archive? (2021-10-19)
A.Buchanan: WinChloe & YACPDB don't know this composition. (2021-10-20)
Mario Richter: No typo, the position with black Kd8 was intended, the cook was found by the 'Schwalbe'-solvers (Heft 71, Oktober 1981, p. 349) (2021-10-21)
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