Die Schwalbe

20 problem(s) found in 1803 milliseconds (displaying 20 problem(s)). [COMMENTDATE>=20220810 AND NOT A='Beuthner, Richard' AND K='Zwillingsfigur'] [download as LaTeX]

1 - P0001550
Michel Caillaud
421 Europe Echecs 295 07/1983
A. Hazebrouck gewidmet
1. Preis
P0001550
(13+12) C+
BP in 35.5
1. h4 c5 2. h5 c4 3. Th4 c3 4. Tc4 b5 5. g4 b4 6. Lg2 b3 7. Lc6 bxa2 8. b4 a5 9. b5 a4 10. b6 a3 11. La4 Sc6 12. b7 d5 13. b8=D d4 14. Dd6 d3 15. Dg6 dxc2 16. d3 fxg6 17. Ld2 c1=L 18. Db3 c2 19. La5 Lh6 20. Sd2 c1=L 21. Sf1 Lcg5 22. f4 Kf7 23. 0-0-0 a1=L 24. fxg5 a2 25. gxh6 Kf6 26. Sh2 Kg5 27. Tf1 Lf6 28. Tff4 a1=L 29. Kb1 Lae5 30. d4 Lb7 31. dxe5 Dd2 32. exf6 Te8 33. f7 Sf6 34. Dd3 Sd7 35. Ld1 Sdb8 36. Sgf3+
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5 Frolkin-Ceriani-Umwandlungen: 4 schwarze Läufer und 1 weiße Dame! Eine der bahnbrechenden frühen KBPs.
Silvio Baier: Der wesentliche thematische Inhalt ist bereits nach 31,5 Zügen erreicht. Bis dahin ist es C+ (Euclide 0.98). (2010-08-04)
James Malcom: Is this fully C+ then? (2021-01-27)
Henrik Juel: No, only the first 31.5 moves are tested OK (2021-01-27)
James Malcom: No Henrik, as in is the entire problem testable. (2021-01-27)
Henrik Juel: I guess that testing the entire problem would take an unreasonably long time (2021-04-06)
A.Buchanan: It might be possible these days: the motivation for stopping at 31.5 is that the promotion theme had been demonstrated by then. But there’s still e.g. bSb8 as random impostor (2021-04-07)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 50:24:34 Stunden.(hh:mm:ss)
Keine Lösung: BP 34.5, BP 35.0. (2023-05-08)
Henrik Juel: Thanks for your patience, Moldenhauer; more than two days... (2023-05-08)
comment
Keywords: Ceriani-Frolkin Theme (llllD), Unique Proof Game, Castling, Promotion (llllD), Impostor (s)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.11 50:24:34 Stunden.(hh:mm:ss) Keine Lösung: BP 34.5, BP 35.0.
FEN: 1n2rb1r/1b2pPpp/2n3pP/B5kP/2R2RP1/3Q1N2/3qP2N/1K1B4
Reprints: 25 Shortest Proof Games 11/1991
(1) diagrammes 103 10-12/1992
(A) Quartz 22 10-12/2002
(8-a) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2021-04-07 more...
2 - P0001629
Andrey Frolkin
498 Europe Echecs 355/356 07-08/1988
2. ehrende Erwähnung
P0001629
(14+14) C+
BP in 26,5
1. Sc3 c5 2. Sd5 c4 3. Sxe7 c3 4. Sg6 hxg6 5. Sf3 Th5 6. Sd4 Ta5 7. Sb5 f5 8. Sa3 Df6 9. Sb1 La3 10. Tg1 d6 11. Th1 Ld7 12. Tg1 La4 13. Th1 Kd7 14. Tg1 Kc6 15. Th1 Kb5 16. Tg1 Sc6 17. Th1 Te8 18. Tg1 Te3 19. Th1 Td3 20. cxd3 c2 21. Tg1 cxd1=S 22. Th1 Sc3 23. Tg1 Se4 24. Th1 Dc3 25. Tg1 Sgf6 26. Th1 Se8 27. Tg1
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Moldenhauer: Computerprüfung: C+ Stelvio 1.11 1 Sekunde.
Keine Lösung: BP 25.5, BP 26.0. (2023-04-02)
comment
Keywords: Unique Proof Game, Non-standard material, Pendulum (T x15), Promotion, Impostor (S)
Genre: Retro
Computer test: Stelvio 1.11
FEN: 4n3/pp4p1/2np2p1/rk3p2/b3n3/b1qP4/PP1PPPPP/RNB1KBR1
Reprints: 502 Europe Echecs 358 10/1988
102 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2023-05-02 more...
3 - P0009046
Peter Wong
9923 Die Schwalbe 169 02/1998
4. Preis
P0009046
(15+14) C+
BP in 23.0
1. e4 a5 2. Ke2 a4 3. Kf3 a3 4. Kg4 axb2 5. a4 Ta6 6. a5 Ta7 7. a6 Ta8 8. a7 Sc6 9. Ta6 Sb8 10. Th6 g6 11. axb8=S Lg7 12. Sa6 Lc3 13. dxc3 Kf8 14. Dd4 De8 15. Da4 Kg7 16. Lc4 Df8 17. Se2 Dd8 18. Td1 Kf8 19. Td6 Ke8 20. Tf6 e6 21. Sd2 Se7 22. Sf3 Sc6 23. Sfg1 Sb8
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Je 3zügiger Tempoverlust von sTa8 und sDd8, dazu Platzwechsel (wSb1 nach g1, sSg8 nach b8) und Switchback (sSb8 und sKe8). Hervorragend!
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 in 1 Sekunde.
Keine Lösung: BP 22.0, BP 22.5. (2023-03-27)
comment
Keywords: Unique Proof Game, Non-standard material, Switchback (sk), Tempo Loss (t3s2d3), Impostor (Ss)
Genre: Retro
Computer test: Stelvio 1.11
FEN: rnbqk2r/1ppp1p1p/N3pRpR/8/Q1B1P1K1/2P5/1pP1NPPP/2B3N1
Reprints: feenschach 141 06/2001
(70) Parallel Strategy 2004
H52 FIDE Album 1998-2000 2007
Input: Gerd Wilts, 1998-06-26
Last update: Silvio Baier, 2023-04-05 more...
4 - P1000642
Satoshi Hashimoto
R048 Probleemblad 03/1999
3. Preis
P1000642
(14+15) C+
BP in 23,0
1. e4 Sf6 2. Df3 Sh5 3. Df6 exf6 4. e5 Ld6 5. e6 0-0 6. e7 Sc6 7. e8=D Tb8 8. De4 Te8 9. Ld3 Te5 10. Se2 Tb5 11. 0-0 Tb3 12. axb3 Kf8 13. Ta6 bxa6 14. Da4 Tb5 15. Le4 Te5 16. d3 Te8 17. Lf4 Ke7 18. Sd2 Th8 19. Ta1 Ke8 20. Kf1 Lf8 21. Ke1 Se7 22. Sf1 c6 23. Lb8 Sg8
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Weiß und Schwarz haben klein rochiert, wTa1 stammt von h1, sTh8 stammt von a8.
Henrik Juel: Natch 3.1 did nothing in almost an hour (2018-12-13)
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comment
Keywords: Unique Proof Game, Impostor (Tts), Switchback (Kkl), Castling, Promotion
Genre: Retro
Computer test: Moldenhauer: Computerprüfung: C+ Stelvio 1.11 84:43:01 Stunden. (hh:mm:ss) Keine Lösung: BP 22.0, BP 22.5. Oder auch Stelvio 2.1 in 25min.
FEN: 1Bbqkbnr/p2p1ppp/p1p2p2/7n/Q3B3/1P1P4/1PP1NPPP/R3KN2
Reprints: feenschach 153, p. 195, 10-12/2003
82 Die Schwalbe 250A, p. 260, 08/2011
7 64 Proof Games 2012
Input: Gerd Wilts, 2000-08-01
Last update: Reto, 2024-03-10 more...
5 - P1000659
Michel Caillaud
R071 Probleemblad 11/1999
P1000659
(11+15)
KBP 27,5
1. e4 h5 2. Dg4 hxg4 3. Sf3 gxf3 4. Le2 fxe2 5. Tf1 exf1=L 6. b4 La6 7. b5 Th3 8. bxa6 b5 9. La3 Lb7 10. Ld6 exd6 11. Sc3 Le7 12. Se2 Lf6 13. Sg1 Lc3 14. e5 La5 15. e6 Tc3 16. h4 Le4 17. h5 Sc6 18. h6 Tb8 19. h7 Tb7 20. h8=D Db8 21. Dh5 Sd8 22. Dd1 f6 23. e7 Kf7 24. e8=S c6 25. Sc7 b4 26. Sb5 b3 27. Sa3 b2 28. Sb1
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sBh7 schlägt DSLT. wDd1 und wSb1 sind Phönixfiguren, wSg1 ist wSb1.
Moldenhauer: Computerprüfung: C+ Stelvio 1.5 in 147:43:15 Stunden.(hhh:mm:ss)
Keine Lösung: BP 27.0 in 49:30:01 Stunden. (2023-08-17)
comment
Keywords: Ceriani-Frolkin Theme (l), Unique Proof Game, Pronkin Theme (DS), Impostor (S)
Genre: Retro
FEN: 1q1n2n1/pr1p1kp1/P1pp1p2/b7/4b3/2r5/PpPP1PP1/RN1QK1N1
Reprints: H35 FIDE Album Annexe 1998-2000 2009
Input: Gerd Wilts, 2000-08-01
Last update: Gerd Wilts, 2009-07-25 more...
6 - P1013083
Roberto Osorio
Jorge Joaquin Lois
Oscar Cuasnicú

R230 Probleemblad 02/2004
3. Lob
P1013083
(15+15) C+
BP in 21,5
1. g3 Sa6 2. Lg2 Tb8 3. Lc6 bxc6 4. Sf3 Tb3 5. 0-0 Ta3 6. bxa3 e6 7. Lb2 Le7 8. Ld4 Lh4 9. Sc3 Dg5 10. Tb1 Se7 11. Tb8 0-0 12. Db1 Lb7 13. Te8 Sg6 14. Te7 Ta8 15. Te8+ Sf8 16. Td8 Lc8 17. Db7 Db5 18. Ta1 Db1+ 19. Se1 Dd1 20. Sb1 Sb8 21. Lb2 a6 22. Lc1
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Aufwändige Manöver zum Einschleusen des wTa1 nach d8 und der sD nach d1. wTa1/sTa8 sind wTh1/sTh8.
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:10:35 Minuten. (hh:mm:ss)
Keine Lösung: BP 20.5, BP 21.0. (2023-03-16)
comment
Keywords: Unique Proof Game, Promenade, Interchange, Castling (2), Switchback (LSls), Impostor (Tt)
Genre: Retro
Computer test: Stelvio 1.11
FEN: rnbR1nk1/1Qpp1ppp/p1p1p3/8/7b/P5P1/P1PPPP1P/RNBqN1K1
Reprints: (81) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 2004-02-20
Last update: Silvio Baier, 2023-03-20 more...
7 - P1013131
Eric Pichouron
R138 Problemesis 38 04/2004
P1013131
(16+13) C+
BP in 22,0
1. c4 a5 2. c5 a4 3. c6 a3 4. cxb7 Sc6 5. bxa8=T La6 6. Da4 Db8 7. Dh4 Kd8 8. g4 Kc8 9. Lg2 Kb7 10. Le4 Da7 11. Txf8 Sf6 12. Ta8 Tb8 13. Lc2 Kc8 14. d3 Kd8 15. Lh6 Tc8 16. Tb8 Ke8 17. Tb6 Ta8 18. Sd2 Db8 19. Tc1 Dd8 20. Lb1 Sb8 21. Tcc6 Sg8 22. Tf6 Lc8
play all play one stop play next play all
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comment
Keywords: Unique Proof Game, Interchange, Switchback (kdlss), Impostor (t)
Genre: Retro
Computer test: Computerprüfung: C+ Stevio 1.11 48:53:36 Stunden. (hh:mm:ss) Keine Lösung: BP21.0, BP 21.5.
FEN: rnbqk1n1/2pppppp/1R3R1B/8/6PQ/p2P4/PP1NPP1P/1B2K1NR
Input: Gerd Wilts, 2004-04-01
Last update: A.Buchanan, 2023-03-13 more...
8 - P1017476
Joachim Iglesias
R146 Problemesis 06/2004
G. Wilts und E. Pichouron gewidmet
P1017476
(15+15) C+
BP in 24,0
1. a4 Sc6 2. Ta3 Se5 3. Tf3 Sg6 4. Tf6 gxf6 5. Sf3 Lh6 6. Sh4 Le3 7. f4 Lc5 8. e3 Sh6 9. La6 b5 10. Tf1 Lb7 11. Tf3 Db8 12. Tg3 Lf3 13. Tg5 Db6 14. Td5 De6 15. Td6 Sf5 16. Tb6 h6 17. Tb7 0-0-0 18. Txa7+ Kb8 19. Tb7+ Ka8 20. Tb6 Tdg8 21. Td6 Sf8 22. Td3 Tg3 23. Ta3 Lg4 24. Ta1 Tf3
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wTa1 wird auf f6 geschlagen; wTh1 wechselt nach langem Ausflug nach a1.
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 44 Sekunden.
Keine Lösung: BP 23.0, BP 23.5.
Notation für Player bitte berichtigen: 24. Ta1 Tf3 (2023-05-01)
comment
Keywords: Unique Proof Game, Castling, Check Protection, Impostor (T)
Genre: Retro
Computer test: Stelvio 1.11
FEN: k4n1r/2pppp2/B3qp1p/1pb2n2/P4PbN/4Pr2/1PPP2PP/RNBQK3
Input: Gerd Wilts, 2004-06-05
Last update: Silvio Baier, 2023-08-15 more...
9 - P1066732
Eric Pichouron
PCCC Meeting 09/2004
3. ehrende Erwähnung Champagne TT 2004
P1066732
(12+14) C+
BP in 24,5
1. e4 h5 2. Dg4 hxg4 3. Sc3 Th3 4. Sd5 Tc3 5. bxc3 Sc6 6. La3 Sd4 7. Ld6 cxd6 8. h4 Da5 9. h5 b6 10. h6 Lb7 11. h7 0-0-0 12. Th6 La8 13. Tf6 gxf6 14. Lc4 Lh6 15. d3 Lc1 16. Se2 La3 17. Kd2 Lb4 18. Th1 Da3 19. Th5 a5 20. Te5 fxe5 21. h8=D Sf6 22. Dh1 Th8 23. Dd1 Th3 24. Ke1 Tf3 25. gxf3
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Richter MC: "A well oiled game using the 'standard Rook' to double the theme, displaying an additional Pronkin and switchback by Ke1."
Henrik Juel: Natch 3.1 did little in half an hour (2018-12-19)
Moldenhauer: Computerprüfung: C+ Stelvio 1.2 02:04:15 Stunden. (hh:mm:ss)
Keine Lösung: BP 23.5, BP 24.0. (2023-05-11)
comment
Keywords: Unique Proof Game, Pronkin Theme (D), Switchback, Impostor (Tt)
Genre: Retro
Computer test: Stelvio 1.2
FEN: b1k5/3ppp2/1p1p1n2/p2Np3/1bBnP1p1/q1PP1P2/P1P1NP2/3QK3
Reprints: H58 Phénix 02-03/2005
Input: Gerd Wilts, 2004-09-14
Last update: Silvio Baier, 2023-08-15 more...
10 - P1066789
Göran Wicklund
R259 Probleemblad 5 09-10/2004
5. Preis
P1066789
(16+11) C+
BP in 29,5
1. h4 Sc6 2. h5 Sd4 3. h6 Sb5 4. hxg7 h5 5. Th3 h4 6. Tg3 h3 7. a4 h2 8. a5 h1=D 9. a6 Dh2 10. axb7 a5 11. bxa8=T Lb7 12. Ta4 Lc6 13. Th4 a4 14. d4 a3 15. d5 a2 16. d6 a1=S 17. dxc7 Sb3 18. Ta1 Sa3 19. c8=T La4 20. Ta8 Db8 21. f4 Kd8 22. f5 Kc7 23. f6 Kb6 24. fxe7 Sf6 25. e8=T Ld6 26. Tc8 Te8 27. g8=T Te7 28. Tge8 Lc7 29. Tgg8 Dd6 30. Th1
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Zyklischer Platzwechsel sechs weißer Türme.
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comment
Keywords: Unique Proof Game, Non-standard material, Interchange (TTTTTT), Impostor (TT)
Genre: Retro
Computer test: Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:05:59 Minuten. (hh:mm:ss) keine Lösung: BP 28.5, BP 29.0.
FEN: RqR1R1R1/2bprp2/1k1q1n2/8/b7/nn6/1PP1P1P1/RNBQKBNR
Reprints: (18) StrateGems 10-12/2007
(80) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 2004-10-17
Last update: Silvio Baier, 2023-08-15 more...
11 - P1068194
Gianni Donati
9926 Thema Danicum 121 01/2006
P1068194
(12+16) C+
BP in 24,0
1. d3 h5 2. Lf4 Sh6 3. Ld6 exd6 4. Sc3 Dg5 5. Db1 Dc1+ 6. Sd1 g5 7. a3 Lg7 8. Da2 Lxb2 9. Dc4 f6 10. Dg4 Kf7 11. Sf3 Te8 12. Sd2 Te3 13. Sb1 Th3 14. e3 Kg6 15. Le2 Sf7 16. Lf3 Sh8 17. Lc6 dxc6 18. 0-0 c5 19. Sdc3 Sc6 20. Dd1 Lg4 21. Kh1 Le2 22. f3 Lxf1 23. Se2 g4 24. Sg1 Kg5
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5zügiger Rundlauf der wD und Platzwechsel der wSS.
Reto: A lot faster with Stelvio 1.25, finished in about 1min. (2023-05-29)
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comment
Keywords: Unique Proof Game, Interchange (SS), Pure Round Trip (D5), Impostor (SS)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.11 01:03:51 Stunde. (hh:mm:ss) Keine Lösung: BP 23.0, BP 23.5.
FEN: r6n/ppp5/2np1p2/2p3kp/6p1/P2PPP1r/1bP3PP/RNqQ1bNK
Input: Gerd Wilts, 2005-12-21
Last update: A.Buchanan, 2023-04-27 more...
12 - P1080540
Paul Raican
P0221 StrateGems 42 04-06/2008
1. Lob
P1080540
(16+14) C+
BP in 16,0
1. e3 a5 2. Dh5 Ta6 3. f3 Tc6 4. Kf2 Tc3 5. bxc3 c6 6. La3 Db6 7. Lxe7 c5 8. Sa3 Dg6 9. Tb1 f5 10. Tb6 Df7 11. Th6 b5 12. Lf6 b4 13. Lb5 Se7 14. Se2 Sg6 15. Ta1 De7 16. Ke1 Dd8
play all play one stop play next play all
paul: Quickly solved by Stelvio. (2023-03-12)
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comment
Keywords: Unique Proof Game, Impostor (T)
Genre: Retro
Computer test: Euclide 0.95, Stelvio v1.11
FEN: 1nbqkb1r/3p2pp/5BnR/pBp2p1Q/1p6/N1P1PP2/P1PPN1PP/R3K3
Input: Gerd Wilts, 2009-01-11
Last update: A.Buchanan, 2023-03-13 more...
13 - P1106507
Ken Kousaka
FIDE World Cup 2010
1. Lob
FIDE World Cup, Retros
P1106507
(15+16) C+
BP in exakt 18,5
1. c3 h5 2. Da4 h4 3. Dc6 dxc6 4. Kd1 Dd4 5. Kc2 Da4+ 6. Kd3 Lf5+ 7. Ke3 e6 8. Sf3 Lc5+ 9. Sd4 Se7 10. Kf4 Sg6+ 11. Kf3 Ke7 12. Sc2 Td8 13. Se1 Td4 14. Ke3 Sd7 15. Sf3 Th8 16. Sg1 Th5 17. f3 Sh8 18. Kf2 Lh7 19. Ke1
play all play one stop play next play all
Henrik Juel: The position can be reached in 18.0 moves: the first 3.0 as above, then Black plays as above, while White plays f3 and 14 tempo-moves like Sh3-g1.
Changing the stipulation to 'Proof game in exactly 18.5 moves' may rectify the situation.
The intended White play is very nice: Roundtrip by Ke1, needed by the triangulation on e3-f4-f3-e3, and roundtrip by Sg1, which screens on d4. (2011-03-14)
A.Buchanan: The preferred trick in such situations is to add an extra half move. So I'd try 19. ... Lg8: is that sound? (2017-09-14)
Henrik Juel: I tried to test 19... Lg8, but Euclide was too slow (2017-09-14)
Mario Richter: rawbats say that appending 19. ... Lg8 allows many alternative solutions, e.g. 1. c3 h5 2. Da4 h4 3. Dc6 dxc6 4. f3 Lf5 5. Sa3 Lh7 6. Tb1 Dd4 7. Ta1 Da4 8. Tb1 e6 9. Ta1 Se7 10. Kf2 Sg6 11. Ke3 Lc5+ 12. Kd3 Ke7 13. Sc4 Td8+ 14. Ke4 Td4+ 15. Ke3 Sd7 16. Sa3 Th8 17. Sb1 Lg8 18. Kf2 Th5 19. Ke1 Sh8
rawbats also says that Henrik's suggestion of changing the stipulation to 'Proof game in exactly 18.5 moves' will make the problem correct. (2017-09-18)
Mario Richter: I forgot: ... but since "loss of tempo" is the theme of the problem, this change of stipulation is IMHO not an option here. (2017-09-18)
A.Buchanan: Thanks Mario, and I agree with you about the aesthetics of change. After posting my Lg8 suggestion, I did regret it because it's doubly suspicious. Firstly, the bishop can sneak past bRh8; secondly it takes the bishop's eye off d3 & c2. A more serious guess is to replace the last black moves by 16... Rh6 17... Sf8 18... Rf6 19... g6. This might fail for what in my head I call the "jigsaw" reason: that the known sub-chains of moves no longer mesh together in a unique way, but I don't think it fails for any other reason. Prove me wrong, stout rawbats! :D (2017-09-18)
A.Buchanan: Sorry Henrik I should also have said thank you for trying to validate my dumb earlier suggestion :-) (2017-09-18)
A.Buchanan: Typo, I meant: 16... Rh6 17... *Sh8* 18... Rf6 19... g6 sorry :( (2017-09-18)
Mario Richter: with the last black moves changed to 16... Rh6 17... Sh8 18... Rf6 19... g6 (final pos: 7n/pppnkp2/2p1prp1/2b2b2/q2r3p/2P2P2/PP1PP1PP/RNB1KBNR) rawbats thinks the problem is correct (2017-09-18)
A.Buchanan: Thank you, Mario. Obviously the composer could easily have fixed this if he was aware of the concern. His KS round trips are fantastically meandering, and the precise W&B play are very interdependent. I am amazed that there is only one composition in PDB by this top level composer, so I've found another to post quickly. He has a website http://open.mixi.jp/user/10857363/diary, with lots of erudite commentary in Japanese on top Western retros. Thank you, google translate! (2017-09-18)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 in einer Sekunde.
Euclide 1.11 bleibt auch nach 487 Std. bei 1 stehen.
BP in 18.0 cooked. (2023-02-09)
Henrik Juel: with position 7n/pppnkp2/2p1prp1/2b2b2/q2r3p/2P2P2/PP1PP1PP/RNB1KBNR and stipulation PG 19.0
you have a problem that is C++ Stelvio 1.0 (2023-02-09)
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comment
Keywords: Unique Proof Game, Tempo Loss (w), Impostor (t)
Genre: Retro
Computer test: Stelvio 1.0
FEN: 7n/pppnkppb/2p1p3/2b4r/q2r3p/2P2P2/PP1PP1PP/RNB1KBNR
Input: Gerd Wilts, 2010-06-01
Last update: Silvio Baier, 2023-03-02 more...
14 - P1295956
Michel Caillaud
6965 Phénix 241, p. 9623, 07-08/2014
P1295956
(16+16) C+
BP in 16,5
1. Sc3 e5 2. Sd5 Lc5 3. Se7 d5 4. e3 Lh3 5. Dg4 a5 6. De6 f5 7. Se2 Sf6 8. Sc3 Tf8 9. Dg8 Ta6 10. Dh8 La7 11. Sg8 Tf7 12. Sb1 Td7 13. Sh6+ Ke7 14. Sf7 Df8 15. Sg5 Se8 16. Sf3 Tf6 17. Sg1
play all play one stop play next play all
Henrik Juel: Thanks for the solution, Hans; I could not find it
The white knights switch places, very nice proof game (2015-01-26)
Henrik Juel: Natch 3.1 did little in half an hour
Stopped at pos. 1 (2018-12-31)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 05:48:08 Stunden. (hh:mm:ss)
Keine Lösung: BP 15.5, BP 16.0. (2023-03-05)
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comment
Keywords: Unique Proof Game, Interchange (SS), Impostor (SS), Capture-free
Genre: Retro
Computer test: Stelvio 1.0
FEN: 1n2nq1Q/bpprk1pp/5r2/p2ppp2/8/4P2b/PPPP1PPP/RNB1KBNR
Input: A.Buchanan, 2015-01-25
Last update: Silvio Baier, 2023-03-20 more...
15 - P1339612
Roberto Osorio
Jorge Joaquin Lois

R496 The Problemist 2015-2016
1. ehrende Erwähnung
The Problemist 2015-2016
P1339612
(11+14) C+
PG in 20.5
1. c4 d5 2. Db3 Lf5 3. Db6 axb6 4. Sh3 Ta3 5. Tg1 Tc3 6. a4 e6 7. a5 Ke7 8. a6 Kf6 9. a7 Le7 10. a8=D Df8 11. Da4 Txc1+ 12. Dd1 Tc3 13. Ta6 Tf3 14. gxf3 bxa6 15. Tg6+ hxg6 16. Sg1 Th3 17. Db3 Tg3 18. Lh3 Kg5 19. De3+ Kh4 20. Dh6+ gxh6 21. fxg3+
play all play one stop play next play all
Judge's comment [Silvio Baier]: "Two cross-captures with the same type of captured pieces (QR) are combined with a cross-capture of two black rooks. This is not the highest number of cross- captures in an orthodox proof game (see e.g. P1003984 for comparison), but the pairs are very harmonious and the additional white Q-Pronkin is difficult to implement, and especially the motivation of the promotion of Pa2 is very deep. The check in the diagram position does not detract, since g2-g3+ is also possible with respect to pure retroanalysis."
A.Buchanan: Great problem, but I disagree with the last sentence in Silvio's comment. The alternative at the end g2-g3+ would force an obtrusive bishop. If the composers could have figured out how to do this without the final check, they obviously would have. (2017-09-18)
Henrik Juel: I also like this proof game very much
It seems the kind of problem that is most readily solved by hand; the missing [Lc1] and the missing black rooks might prompt the suspicious solver to consider cross-captures
Euclide did find the solution, but after a long time, and he was not able to verify uniqueness within an hour (2017-09-18)
Moldenhauer: Computerprüfung: C+ Stelvio 1.4 00:01:28 Minute. (hh:mm:ss)
Wegen Retraktion, keine Überprüfung auf 20.0. (2023-07-17)
more ...
comment
Keywords: Unique Proof Game, Cross-capture (DT,DT,tt), Ceriani-Frolkin Theme (D), Impostor (ppppPP)
Genre: Retro
Computer test: Stelvio 1.4
FEN: 1n3qn1/2p1bp2/pp2p1pp/3p1b2/2P4k/5PPB/1P1PP2P/1N2K1N1
Reprints: The Problemist , p. 5, 03/2017
Input: A.Buchanan, 2017-09-18
Last update: Silvio Baier, 2023-08-15 more...
16 - P1340215
Roberto Osorio
Jorge Joaquin Lois

R470 The Problemist vol.24-8, p. 341, 03/2014
after Satoshi Hashimoto
Lob
The Problemist 2013-2014
P1340215
(15+9)
PG in 18.5
1. d3 g5 2. Lxg5 Lg7 3. Dd2 Lc3 4. Sxc3 c5 5. 0-0-0 Dc7 6. Sb1 Dg3 7. hxg3 h6 8. Txh6 b6 9. Te6 Th3 10. gxh3 Lb7 11. Lg2 Lf3 12. Sxf3 Sf6 13. Th1 Se4 14. Dd1 Sd2 15. Kxd2 fxe6 16. Ke1 Kf7 17. Lc1 Kf6 18. Sg1 Ke5 19. Lf1
play all play one stop play next play all
Judge's comment [Thomas Brand]: "This elegant proof game seems me original enough compared with Hashimoto's Probleemblad 1999, 3rd Prize, (PDB P1000642), even though the theme is not doubly set. The only missing white man is a Rook captured at e6, but Ra1 could not leave home."
Henrik Juel: The white plan is obvious, and Black ensures uniqueness by putting his men to be captured on squares, where White can go anyway, and by a late king's walk
This proof game is an enjoyable solving object showing that man can beat the computer; Euclide was still trying to find a strategy (a list of moves, possibly infeasible, that leads to the diagram position), when I had solved the problem and written the present lines...
You might call Pg3,h3 impostors also, as well as Th1 (2017-09-27)
Moldenhauer: Computerprüfung: C+ Natch 3.3 in 5 Std. 57 Min. nur obige Lösung
BP in 17.5 keine Lösung. (2022-09-05)
more ...
comment
Keywords: Unique Proof Game, Impostor (TPP), Switchback (SLDKLS), Cross-capture (gh)
Genre: Retro
FEN: rn6/p2pp3/1p2p3/2p1k3/8/3P2PP/PPP1PP2/1NBQKBNR
Reprints: R470 The Problemist vol.25-8, p. 347, 03/2016
Input: A.Buchanan, 2017-09-27
Last update: Alfred Pfeiffer, 2019-06-03 more...
17 - P1384733
Silvio Baier
Nicolas Dupont

Phénix 2012-2013
1. Preis
P1384733
(12+14) C+
BP in 27
1. h4 a5 2. h5 a4 3. h6 Ta5 4. hxg7 h5 5. f4 h4 6. f5 h3 7. f6 Th4 8. fxe7 f5 9. b4 Sf6 10. g8=L Lh6 11. Lb3 axb3 12. g4 b2 13. g5 Tg4 14. g6 Lg5 15. g7 Kf7 16. g8=L+ Kg6 17. Lc4 d5 18. e8=T dxc4 19. Te6 Dd3 20. Ta6 bxa6 21. e4 Lb7 22. e5 Le4 23. e6 Te5 24. e7 c5 25. e8=T Sc6 26. Td8 Se8 27. Td4 cxd4
play all play one stop play next play all
paul: Tested by Stelvio in ~2h (2023-02-02)
comment
Keywords: Ceriani-Frolkin Theme (TTLL), Future Proof Game, Impostor (TTLL)
Genre: Retro
FEN: 4n3/8/p1n3k1/4rpb1/1Pppb1r1/3q3p/PpPP4/RNBQKBNR
Input: fs/hg, 2020-12-30
Last update: Silvio Baier, 2022-03-31 more...
18 - P1404948
Anirudh Daga
18941 Die Schwalbe 314 04/2022
P1404948
(14+11)
Beweispartie in 6,5 Zügen
b) +sBc7
c) d7->c7
a) 1. d4 e5 2. dxe5 Ld6 3. exd6 Dg5 4. dxc7 Dxc1 5. cxb8=L Dxb1 6. Lf4 Dc1 7. Lxc1
b) 1. Sf3 e5 2. Sxe5 Sc6 3. Sxc6 Lb4 4. Sxd8 Lxd2+ 5. Sxd2 Kxd8 6. Sf3 Ke8 7. Sg1
c) 1. Sc3 d5 2. Sxd5 Sd7 3. Sxe7 Sdf6 4. Sxg8 Dxd2+ 5. Dxd2 Ld6 6. Dxd6 Sxg8 7. Dd1
play all play one stop play next play all
Singapur, 13 Jahre alt, mit Andrew Buchanan und James Quah: https://www.thehoppermagazine.com
LaTeX-import:
Keyword not uniquely identified: s in c)
Henrik Juel: C++ Euclide 1.01 (2022-11-05)
Henrik Juel: Good proof games, Anirudh (2022-11-05)
comment
Keywords: Homebase (2), Pronkin Theme (L,,), Switchback (,,D), Impostor (,S,)
Genre: Retro
FEN: r1b1k1nr/pp1p1ppp/8/8/8/8/PPP1PPPP/R1BQKBNR
Input: Stefan Höning, 2022-10-07
Last update: A.Buchanan, 2022-11-05 more...
19 - P1408920
Kevin James Begley
Kostas Prentos

19138 Die Schwalbe 317 2022/10
P1408920
(16+16)
BP in 12,5

Kontraparraincirce
1. d4 a5 2. Dd3 Ta6 3. Dxh7 Th6[+sBa7] 4. a4 Th3 5. Sa3 Txa3 6. Dh4[+wSa6] bxa6 7. Dxh8[+wSa2] Th3[+sTa8] 8. Dxg8 Th8[+sSg3] 9. Le3 Sxf1 10. Td1[+sLc1] Sxe3 11. Sf3[+wLf1] Sc4 12. Sd2 Sxb2 13. Sb1[+wBd3]
play all play one stop play next play all
Kevin Begley: Five Siblings (2023-04-17)
comment
Keywords: Unique Proof Game, Circe (Kontraparrain), Impostor (ttLLS)
Genre: Retro, Fairies
FEN: rnbqkbQr/p1ppppp1/p7/p7/P2P4/3P4/NnP1PPPP/1NBRKB1R
Input: Kevin Begley, 2023-04-16
Last update: Kevin Begley, 2023-08-22 more...
20 - P1411896
Kostas Prentos
Kevin James Begley

3073 Problemskak 61, p. 17, 01/2023
P1411896
(16+13) C+
BP in 9,5

Einsteinschach
1.d3 h6 2.Lxh6=T c6 3.Txc6=D Th6=L 4.g3 Lc1=S 5.e3 f6 6.Le2=S Kf7 7.Sxc1=L Kg6 8.Se2=B Kh7 9.0-0[f1=T] Kh8 10.Dh1=T

Cyclic Platzwechsel (Rh1 to f1=B, Lf1 to c1=B, Lc1 to h1=R).
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Einstein Chess, Impostor (LLT)
Genre: Retro, Fairies
FEN: rnbq1bnk/pp1pp1p1/5p2/8/8/3PP1P1/PPP1PP1P/RNBQ1BKR
Input: Kevin Begley, 2023-08-22
Last update: Kevin Begley, 2023-08-22 more...
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