Die Schwalbe

20 problem(s) found in 2188 milliseconds (displaying 20 problem(s)). [COMMENTDATE>=20220810 AND G='Retro' AND K='Eindeutige Beweispartie'] [download as LaTeX]

1 - P0008537
Michel Caillaud
615v Europe Echecs 452 01/1997
(14+9) C+
BP in 21,5
1. d3! Sc6 2. d4 Se5 3. dxe5 Sf6 4. exf6 Tg8 5. fxg7 f6! 6. gxf8=S Tg3 7. hxg3 f5 8. Th6 f4 9. Td6 exd6 10. Se6 Dh4 11. Sc5 Dh3 12. gxh3 h6! 13. Lg2 h5 14. Lc6 dxc6 15. Kf1 Le6 16. Kg2 Lb3 17. axb3 0-0-0 18. Ta6 Td7 19. Tb6 a6! 20. Sa4 a5 21. Ta6 c5 22. Ta8#
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Vladimir Rey: C+ Natch 3.2 - Solution found: 1. Positions analysed: 51578. Resolution time: 5 h 33 mn 32.84 s. (2020-05-08)
Vladimir Rey: Check please: Keywords Tempo Loss. (2022-09-05)
Keywords: Unique Proof Game, Castling, Tempo Loss (Bbb), Non-standard material (S), Cross-capture
Genre: Retro
Computer test: Natch 3.2
FEN: R1k5/1ppr4/3p4/p1p4p/N4p2/1P4PP/1PP1PPK1/1NBQ2N1
Reprints: H14 FIDE Album Annexe 1995-1997 2004
Input: Gerd Wilts, 1997-01-02
Last update: A.Buchanan, 2020-05-08 more...
2 - P0008940
Unto Heinonen
R019 Probleemblad 03/1998
(8+11) C+
BP in 20,5
1. Sf3 b5 2. Sd4 Lb7 3. Sxb5 Lxg2 4. Sxa7 c6 5. Sc8 Txa2 6. Sc3 Txb2 7. Ta8 Da5 8. Sa2 Dxd2+ 9. Kxd2 Sa6 10. Kc3 Sc5 11. Dd4 Txc2+ 12. Kb4 Txe2 13. La3 Txf2 14. La6 h5 15. Ta1 Lf1 16. Dxg7 Txh2 17. Dxg8 Th4+ 18. Dg4 Lh6 19. Ka5 Lc1 20. Da4 Th6 21. Sa7#
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paul: Checked the first 16.5 moves with Euclide. (2014-12-04)
paul: Thr first 17.5 moves checked by Euclide (~29 hours) (2014-12-06)
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Keywords: Unique Proof Game, Ornament
Genre: Retro
Computer test: Computerprüfung: C+ Natch 3.3 in 302 Std. 48 Min. Lösung 1 (Stellung 3391) Notation OK.
FEN: R3k3/N2ppp2/B1p4r/K1n4p/Q6r/B7/N7/R1b2b2
Input: Gerd Wilts, 1998-06-26
Last update: A.Buchanan, 2022-11-25 more...
3 - P1000219
Mark Kirtley
10414v Die Schwalbe 177 06/1999
Michel Caillaud gewidmet
BP in 21,0
1. e4 a5 2. Dh5 Ta6 3. Dxa5 Th6 4. Da8 Sa6 5. Dxc8 Th5 6. Da8 h6 7. Dxa6 Da8 8. Dg6 Kd8 9. Dh7 Kc8 10. Dxg8 Kb8 11. Dxf8+ Ka7 12. Dxa8+ Kb6 13. Da5+ Kc6 14. La6 Kd6 15. d3 Ke6 16. Ld2 Kf6 17. Lb4 Kg6 18. Kd2 Kh7 19. Kc3 Kg8 20. Sd2 Kf8 21. Te1 Ke8
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14zügiger Rundlauf des sK
Korrektur in "Die Schwalbe" 181, 02/2000, S.377
Henrik Juel: Natch 3.1 did nothing in more than 3 hours (2018-12-13)
Vladimir Rey: I guess, FEN-misprint. Correct e3 = e4, probably. If p. e3: dual 8. Da6-d3 (2022-11-06)
Keywords: Unique Proof Game, Pure Round Trip (k)
Genre: Retro
FEN: 4k2r/1pppppp1/B6p/Q6r/1B6/2KPP3/PPPN1PPP/4R1NR
Reprints: 10414 Die Schwalbe 181 02/2000
Input: Gerd Wilts, 2000-08-01
Last update: Alfred Pfeiffer, 2018-12-14 more...
4 - P1000920
Unto Heinonen
R063c Probleemblad 09-10/2000
2. Preis
BP in 18,5
1. a4 b5 2. axb5 Sa6 3. Txa6 d5 4. Tg6 hxg6 5. b4 Th3 6. La3 Tg3 7. hxg3 Sh6 8. Txh6 Lh3 9. gxh3 gxh6 10. Lg2 Lg7 11. Le4 Lc3 12. dxc3 a5 13. Kd2 dxe4 14. Kc1 e3 15. De1 Dd1+ 16. Kb2 0-0-0 17. bxa5 Td3 18. Ld6 exd6 19. cxd3
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5 Überkreuzschläge von Bauern.
Henrik Juel: Natch 3.1 did nothing in half an hour (2018-12-14)
paul: Correction of P1000629 (2022-10-12)
Keywords: Unique Proof Game, Castling (sg), Cross-capture (5)
Genre: Retro
FEN: 2k5/2p2p2/3p2pp/PP6/8/2PPp1PP/1K2PP2/1N1qQ1N1
Reprints: feenschach 153, p. 195, 10-12/2003
H28 FIDE Album Annexe 1998-2000 2009
Input: Gerd Wilts, 2000-10-12
Last update: Alfred Pfeiffer, 2018-12-20 more...
5 - P1013075
Richard J. Dunn
R344v The Problemist 01/2004
BP in 16,5
1. d4 Sc6 2. d5 Sd4 3. Lf4 Sxe2 4. Lg3 Sc1 5. La6 c6 6. c4 Da5+ 7. Sc3 Kd8 8. f4 Kc7 9. f5+ Kb6 10. f6 Kc5 11. fxg7 Sf6 12. g8=T Se4 13. Tg4 Sd2 14. Se4+ Kd4 15. Sc5+ Ke3 16. Td4 Sf1+ 17. Td2
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First version had Sf1 on b1.
Moldenhauer: Computerprüfung: C+ Euclide 1.11 eindeutige Lösung
gekocht bei BP 17.0 und bei BP 16.0 Umwandlungsfehler (2022-08-21)
Keywords: Unique Proof Game, Non-standard material (T)
Genre: Retro
FEN: r1b2b1r/pp1ppp1p/B1p5/q1NP4/2P5/4k1B1/PP1R2PP/R1nQKnNR
Input: Gerd Wilts, 2004-02-04
Last update: A.Buchanan, 2019-10-12 more...
6 - P1068381
Paul Raican
Vlaicu Crisan

624 Quartz 28 07-09/2005
(14+13) C+
BP in 15,0
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
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paul: 11.Thg8 (2022-09-16)
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...
7 - P1098713
Guy Sobrecases
Internet-Turnier 28/01/2010
3. Preis Weihnachtsturnier 2009, Retro
(14+14) C+
BP in 9,5
2 Varianten
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
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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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Keywords: Unique Proof Game, Immune Chess, Schnoebelen Theme (TL), Prentos Theme, Ceriani-Frolkin Theme, Homebase
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, 2022-11-13 more...
8 - 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
1. h4 b6 2. h5 La6 3. h6 Lxe2 4. hxg7 Lxf1 5. gxh8=T Lxg2 6. Txh7 Lxh1 7. Txh1
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paul: No need of Schlagschach (same solution with orthodox rules) (2022-11-06)
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...
9 - P1176382
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
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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)
Keywords: Annan Chess, Ceriani-Frolkin Theme (TLS), Unique Proof Game, Homebase
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: James Malcom, 2022-08-18 more...
10 - P1254157
Stephan Dietrich
15246 Die Schwalbe 255 06/2012
(16+16) C+
KBP in 6.0
Kees: 1.Sc3 d6 2.Sd5 Dd7 3.Sxe7[d5] Lxe7[Sf8] 4.Sxd7[Df8] c5 5.Sxc5[d7] a6 6.Sxa6[c5] bxa6[Sb7] (2022-11-07)
Keywords: Unique Proof Game, Circe (Platzwechsel)
Genre: Retro, Fairies
FEN: rnb1kqnr/1N1pbppp/p2p4/2pp4/8/8/PPPPPPPP/R1BQKBNR
Input: Mario Richter, 2012-11-23
Last update: Mario Richter, 2012-11-23 more...
11 - P1256160
Bernd Gräfrath
14448 Die Schwalbe 242 04/2010
Dem Taoisten Hilmar zum 60. Geburtstag gewidmet
BP in genau 6,0
1. e3 a6 2. Lxa6 bxa6[=wBa6] 3. Df3 Lb7 4. axb7 Sa6 5. bxa8=D Dxa8 6.Dxa8+ Sb8
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Moldenhauer: Computerprüfung: C+ Jacobi v0.7.6 beta1 in 6 Min. (2022-08-18)
Keywords: Unique Proof Game, Tibetan chess, Schnoebelen Theme (D), Anti-Pronkin (D), Prentos Theme, Ceriani-Frolkin Theme
Genre: Retro, Fairies
FEN: Qn2kbnr/2pppppp/8/8/8/4P3/PPPP1PPP/RNB1K1NR
Input: Gerd Wilts, 2012-12-13
Last update: A.Buchanan, 2019-02-03 more...
12 - P1340215
Roberto Osorio
Jorge Joaquin Lois

R470 The Problemist vol.24-8, p. 341, 03/2014
after Satoshi Hashimoto
The Problemist 2013-2014
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
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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 ...
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...
13 - P1347359
François Labelle
8061 Phénix 279-280, p. 10986, 2017
ser-BP in 31
1. Sc3 2. Sd5 3. c3 4. Da4 5. Da6 6. a4 7. a5 8. Ta4 9. Tg4 10. Tg5 11. g4 12. Lg2 13. Le4 14. Lb1 15. d3 16. Lf4 17. e3 18. Se2 19. Tg1 20. Tg3 21. Th3 22. Th6 23. h3 24. Lh2 25. Sdf4 26. Sh5 27. f4 28. Kf2 29. Kg3 30. Kh4 31. Seg3
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Längste eindeutige Serienzug-BP ohne Schläge
Cf: P1017659
paul: Verified by Jacobi with: stip ser-dia 31 forsyth rsbqkbsr/pppppppp/Q6R/P5RS/5PPK/2PPP1SP/1P5B/1B6 (2021-12-09)
Joost de Heer: This is probably Kriegspiel? If there are no black pieces, the knight path on moves 25/26 can go over f6 as well. (2022-10-25)
A.Buchanan: Good catch, Joost. The black units (because of bK) are necessary. I haven’t heard the term Kriegspiel used to describe this. (2022-10-25)
Henrik Juel: This is a series proof game (where only White moves, and he may not check with an intermediate move)
I see no relation to the fairy condition Kriegspiel (2022-10-25)
Keywords: Unique Proof Game, Seriesmover, Move Length Record (ex-aequo), Capture-free, Homebase
Genre: Retro, Fairies
Computer test: paul: Verified by Jacobi with: stip ser-dia 31 forsyth rsbqkbsr/pppppppp/Q6R/P5RS/5PPK/2PPP1SP/1P5B/1B6
FEN: rnbqkbnr/pppppppp/Q6R/P5RN/5PPK/2PPP1NP/1P5B/1B6
Input: A.Buchanan, 2018-02-28
Last update: A.Buchanan, 2022-10-25 more...
14 - P1380669
Marco Bonavoglia
2nd commendation
(14+15) C+
BP in 5.0
2 Lösungen
vertikaler Zylindre
Kees: 1.e4 g6 2.Da6 hxa6 3.c4 Th6 4.d3 Fg7 5.Fxh6 axh6
1.c4 a6 2.Dg6 hxg6 3.d3 Th6 4.Fxh6 gxh6 5.e4 Fg7 (2022-11-22)
more ...
Keywords: Unique Proof Game, Vertical Cylinder, RIFACE Retro Composition Tourney (2016)
Genre: Retro, Fairies
Computer test: C+ Jacobi
FEN: rnbqk1n1/1pppppb1/p5pp/8/2P1P3/3P4/PP3PPP/RN2KBNR
Input: A.Buchanan, 2020-10-05
Last update: A.Buchanan, 2021-06-09 more...
15 - P1384182
Thomas Thannheiser
16054 Die Schwalbe 268, p. 571, 8/2014
Beweispartie in 10,5 Zügen
1. h4 Sc6 2. h5 Sd4 3. h6 Sxe2 4. hxg7 Sxc1 5. gxh8=T Sxa2 6. Txa2 a5 7. Txa5 Txa5 8. T8xh7 Th5 9. T7xh5 Lg7 10. Th8 Lxh8 11. Txh8
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Keywords: Anti-Pronkin, Beweispartie, Ceriani-Frolkin-Thema, Donati-Thema
SB: "Sehr schwer zu lösen, weil kaum Anhaltspunkte in der Diagrammstellung sichtbar sind. Letztendlich schält sich thematisch ein Donati und ein Anti-Pronkin auf weißer Seite heraus. Als Rätsel ok, thematisch zeigt die folgende Aufgabe, was möglich ist." MRic hingegen: "Der wUW-Th8 verlässt sein UW-Feld, nur um später wieder dorthin zurückzukehren und geschlagen zu werden, wonach letztendlich sein Original-Bruder von h1 seinen Tod rächt und seinen Platz auf dem UW-Feld einnimmt. Das ist wieder ein schönes Stück aus dem Hause Thannheiser - kurz, prägnant und witzig, hat mir sehr gut gefallen!" KHS: "Interessant, wie der wT nach h8 gelangt." TZ: "Hier sind die Spuren des sS und whB noch deutlich zu erkennen, so dass die ersten Züge recht klar sind. Die linke mit der rechten Hälfte dann zu verbinden, hat noch ein wenig Mühe gekostet, da ich es länger mit einem wL auf h8 versucht hatte." JB: "Ein starkes T-Duell mit w 'Vorweg-Phönix-Turm' - noch einmal Ceriani-frolkin." HG: "In Fast-Homebase wird ein geschlagener Donati-Turm durch einen Anti-Pronkin-Turm ersetzt. Dupont möchte das allerdings sogar orthodox inzwischen gern doppelt gesetzt haben. Was bei Schlagschachaufgaben in der Regel den Kunstgenuss trübt, sind die (offenbar unumgänglichen) nichtthematischen Schlagfälle, die erkennbar auch die Konstruktion erleichtern."
Moldenhauer: Computerprüfung: C+ Popeye 4.88 in 3 Min. 7 Sek.
keine Lösung in BP10 (2022-08-28)
Henrik Juel: Popeye 4.61 (using 1099 MB) spent 2:03 min., mostly verifying uniqueness (2022-08-29)
Henrik Juel: The non-solution in 10.0 moves took 8 sec. (2022-08-29)
Keywords: Ceriani-Frolkin Theme, Losing Chess, Unique Proof Game, Homebase (s), Donati Theme (T), Anti-Pronkin (T), Prentos Theme (T)
Genre: Retro, Fairies
FEN: 2bqk1nR/1ppppp2/8/8/8/8/1PPP1PP1/1N1QKBN1
Input: RJB, 2014-08-03
Last update: A.Buchanan, 2022-08-29 more...
16 - P1384617
Michel Caillaud

3. Preis
(16+16) cooked
BP 15,5
1. BEfd4 Sf6 2. BEe3 Sd5 3. BEdxd5[+sSd2] Sxb1[+wSg8] 4. Sh6 Sc3 5. Kd2 BEhxh6[+wSh7] 6. BEcxc3[+sSc2] Sb4 7. BEe6 Sd5 8. Kd3 Sf6 9. Ld2 Sg8 10. Sf6+ BEfxf6[+wSf7] 11. Sd6+ BEdxd6[+wSd7] 12. Sb6 BEbxb6[+wSb7] 13. Sa5 La6+! 14. Sc4 Lb7 15. Sa3 Lc8 16. Sb1
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Cook: 1. BEfd4 Sa6 2. BEe3 Sb4 3. Kd2 Sd5 4. Kd3 Sgf6 5. BEdxd5[+sSd2] Sxb1[+wSg8] 6. BEe6 Sd2 7. Dxd2[+sSd1]! Sc3 8. Sh6 Sg8 9. BEcxc3[+sSc2] BEhxh6[+wSh7] 10. Sf6+ BEfxf6[+wSf7] 11. Sd6+ BEdxd6[+wSd7] 12. Sb6 BEbxb6[+wSb7] 13. Sa5 Sd4 14. Sc4 Sc6 15.Sa3 Sb8 16.Sb1
Source not uniquely identified: 61. WCCC
Michel Caillaud: Source : Ohrid 2018 (61. WCCC)

Solution :
1.BEfd4 Sf6 2.BEe3 Sd5 3.BEdxd5(Sd2) Sxb1(Sg8) 4.Sh6 Sc3 5.Kd2 BEhxh6(Sh7) 6.BEcxc3(Sc2) Sb4 7.BEe6 Sd5 8.Kd3 Sf6 9.Dd2 Sg8 10.Sf6+ BEfxf6(Sf7) 11.Sd6+ BEdxd6(Sd7) 12.Sb6 BEbxb6(Sb7) 13.Sa5 La6+! 14.Sc4 Lb7 15.Sa3 Lc8 16.Sb1

Cooked using Jacobi 0.7.5 and constraints :
1.BEfd4 Sa6 2.BEe3 Sb4 3.Kd2 Sd5 4.Kd3 Sgf6 5.BEdxd5(Sd2) Sxb1(Sg8) 6.BEe6 Sd2 7.Dxd2(Sd1)! Sc3 8.Sh6 Sg8 9.BEcxc3(Sc2) BEhxh6(Sh7) 10.Sf6+BEfxf6(Sf7) 11.Sd6+ BEdxd6(Sd7) 12.Sb6 BEbxb6(Sb7) 13.Sa5 Sd4 14.Sc4 Sç6 15.Sa3 Sb8 16.Sb1

Correction : 9.Ld2! instead of 9.Dd2 in the intention (2022-09-13)
Keywords: Unique Proof Game, Berolina chess
Pieces: bu = Berolina Pawn (BE)
Genre: Retro
FEN: rnbqkbnr/*2p1*2p1*2p1*2p1/1*2p1*2p*2P*2p1*2p/8/8/2*2PK*2P3/*2P*2P1Q*2P1*2P*2P/RNB2BNR
Input: fs/hg, 2020-12-30
Last update: Arnold Beine, 2022-09-14 more...
17 - P1386520
Unto Heinonen
P0493v StrateGems 89, p. 36, 01/2020
2. ehrende Erwähnung
BP in 42.5
1. h4 a5 2. Th3 Ta6 3. Tf3 Tg6 4. Sh3 Tg3 5. Sf4 Th3 6. g3 Th2 7. Lh3 Sh6 8. Le6 Sf5 9. Lc4 d5 10. Kf1 Th1+ 11. Kg2 Tg1+ 12. Kh3 Kd7 13. Kg4 h5+ 14. Kg5 Th6 15. a4 Tb6 16. Taa3 Kc6 17. Tac3 Tb3 18. Sg6 Ta3 19. b3 Ta2 20. La3 Dd6 21. Lc5 Sd7 22. La7 Sb6 23. Sh8 Kc5 24. La6+ Kb4 25. Tc5 g6 26. Sc3 Lg7 27. Se4 Lc3 28. Da1 Sd4 29. Kh6 Ld7 30. Kg7 Lb5 31. Kf8 Ld3 32. Ke8 Dc6+ 33. Kd8 Sc4 34. Kc8 Ka3 35. Kb8 Lb4 36. Ka8 De8+ 37. Lb8 Sb6+ 38. Ka7 Sa8 39. c4 Sc2 40. Df6 Sa1 41. Db6 Kb2 42. Tf6 Kb1 43. Sc3+
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Korrektur zu P0002554
James Malcom: Correction of P0002554 (2021-02-15)
Henrik Juel: The given proof game does not produce the diagram position (2021-02-15)
James Malcom: Fixed. (2021-02-15)
paul: 2nd Honorable Mention (SG98, 2022) (2022-08-20)
Keywords: Unique Proof Game, Capture-free, Move Length Record
Genre: Retro
FEN: nB2q2N/Kpp1pp2/BQ3Rp1/p1Rp3p/PbP4P/1PNb2P1/r2PPP2/nk4r1
Input: James Malcom, 2021-02-15
Last update: Mario Richter, 2022-08-21 more...
18 - P1388717
Ralf Krätschmer
R554 The Problemist 05/2020
(11+9) C+
BP in 11.5
1. b4 f5 2. b5 f4 3. b6 f3 4. bxc7 fxg2 5. cxb8=S gxh1=D 6. Sxd7 Dd5 7. Sxf8 Dxd2+ 8. Lxd2 Dxd2+ 9. Sxd2 Kd8 10. Sxh7 Txh7 11. Tc1 Th8 12. Sb1+
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ Natch 3.3 in 5 Tage 10 Std. 49 Min. eine Lösung gefunden.
Prüfung BP in 11 u. 12, keine Lösung! (2022-08-30)
A.Buchanan: Since the position is check, the only shorter PG which requires examination is 10.5 (2022-08-30)
Moldenhauer: Computerüberprüfung: BP in 10.5 Natch 3.3 keine Lösung! Zeit 16 Std. 22 Min. (2022-09-01)
more ...
Keywords: Discovered check, Unique Proof Game, Excelsior, black, Excelsior, white, Prentos Theme (Sd), Switchback (St), Promotion (d), under-promotion (S), x pieces capture on one square (4)
Genre: Retro
Computer test: Computerprüfung: C+ Natch 3.3 in 5 Tage 10 Std. 49 Min. eine Lösung gefunden. Prüfung BP in 11 u. 12, keine Lösung!
FEN: r1bk2nr/pp2p1p1/8/8/8/8/P1P1PP1P/1NRQKBN1
Input: Gunter Jordan, 2021-04-18
Last update: A.Buchanan, 2022-08-30 more...
19 - P1404683
Kevin James Begley
P0540 StrateGems 99 07-09/2022
BP in 9,5
1. e4 d5 2. La6 Sxa6 3. De2 Lg4 4. exd5 Dxd5[+sBd8] 5. De6[+wBd1] Tc8 6. Qxc8 Dd7[+sTc6] 7. Dxd8+ Dxd8[+sBd7] 8. Sf3[+wDe6] Lxf3 9. De2 Lxe2 10. dxe2[+sDd1]
play all play one stop play next play all
Kevin Begley: Two pairs of units (wDd1/wBe2 and sDd8/sBd7) exchange places twice. (2022-09-27)
Keywords: Unique Proof Game, Circe (Kontraparrain), Homebase, Interchange, Round Trip (DdBb)
Genre: Retro, Fairies
FEN: 3qkbnr/pppppppp/n1r5/8/8/8/PPPPPPPP/RNBQK2R
Input: Kevin Begley, 2022-09-26
Last update: Kevin Begley, 2022-09-27 more...
20 - P1405422
Eric Pichouron
Retros mailing list 25/09/2004
3rd Honorable Mention
Summer Tourney 2003/2004
(11+10) C+
PG in 13.0
1. a4 h5 2. a5 h4 3. a6 h3 4. axb7 hxg2 5. h4 a5 6. h5 a4 7. h6 a3 8. h7 a2 9. hxg8=S axb1=D 10. Txa8 Dxc1 11. Txb8 Da1 12. Txc8 Dxc8 13. bxc8=L gxf1=T+
play all play one stop play next play all
Henrik Juel: C++ Euclide 1.01
Euclide found the solution quickly and spent som 25 minutes to verify uniqueness
Here C++ means that Euclide found no solution in 12 or 11 moves
The testing times could have been reduced by utilizing that last move must be g2xLf1=T+ almost certainly (2022-10-30)
A.Buchanan: Thanks Henrik - unique PG in 13.0 implies there is no PG in 11.0. For comprehensive check of short solutions it suffices to check deltas 0.5, 1.0 & 1.5. Normally these are way easier to check than the intended length. And if there’s check in the final position as here, then half the tests are free! Is that C+++ in your notation? :) (2022-10-31)
Henrik Juel: No, Andrew, I think that C++ suffices (2022-10-31)
more ...
Keywords: Unique Proof Game, Allumwandlung
Genre: Retro
Computer test: C++ Euclide 1.01
FEN: 2B1kbNr/2ppppp1/8/8/8/8/1PPPPP2/q2QKrNR
Input: A.Buchanan, 2022-10-30
Last update: A.Buchanan, 2022-10-31 more...
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The problems of this query have been registered by the following contributors:

Gerd Wilts (10)
Mario Richter (1)
A.Buchanan (4)
RJB (1)
fs/hg (1)
James Malcom (1)
Gunter Jordan (1)
Kevin Begley (1)