Die Schwalbe

43 problem(s) found in 3857 milliseconds (displaying 43 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT K='Serienzüger' AND A='Osorio, Roberto'] [download as LaTeX]

1 - 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
play all play one stop play next play all
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...
2 - P1066806
Roberto Osorio
R077 Problem Paradise 10-12/2003
3. ehrende Erwähnung
P1066806
(9+15) C+
BP in 23,5
1. g3 Sc6 2. Lg2 Sd4 3. Lc6 dxc6 4. Kf1 Lf5 5. Kg2 Lg6 6. Df1 Sf5 7. Kf3 Kd7 8. Ke4 Kd6 9. Kd3 Kc5+ 10. Kc3 Dd5 11. Dh3 Dxa2 12. Dxh7 Dxb1 13. Dh4 Dxc1 14. Da4 Txh2 15. Sh3 Dxh1 16. Tg1 a5 17. Da1 Kb5 18. Kb3 a4+ 19. Ka2 a3 20. Kb1 a2+ 21. Kc1 Ta3 22. Kd1 Txg3 23. Ke1 Tgg2 24. Dd1
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Pure Round Trip (KD)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.4 in 10:29:19 Stunden. (hh:mm:ss) Keine Lösung: BP 23.0. Stelviodaten: 2 Seeker/16 Player 108 GB.
FEN: 5bn1/1pp1ppp1/2p3b1/1k3n2/8/7N/pPPPPPrr/3QK1Rq
Input: Gerd Wilts, 2004-10-17
Last update: A.Buchanan, 2023-07-28 more...
3 - P1067819
Jorge Joaquin Lois
Roberto Osorio

R269 Probleemblad 1 01-02/2005
P1067819
(15+15) C+
BP in 20,0
1. g4 h6 2. g5 hxg5 3. Lg2 Th3 4. Le4 Tb3 5. axb3 Sf6 6. Ta5 Sh5 7. Tf5 a5 8. d3 a4 9. Lf4 a3 10. e3 a2 11. Dg4 a1=T 12. Sf3 T1a6 13. 0-0 Tg6 14. Tc1 f6 15. Se1 Kf7 16. f3 Ke6 17. Te5+ Kd6 18. Td5+ Kc6 19. Ta5+ Kb6 20. Ta1 c5
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Der wT gibt dreimal Schach und Schachschutz für den sK.
Henrik Juel: Natch 3.1 found little in half an hour
Stopped at position 4 (2018-12-21)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 00:24:45 Minuten (hh:mm:ss).
Keine Lösung: BP 19.0, BP 19.5. (2023-03-01)
comment
Keywords: Unique Proof Game, Phoenix (t), Check Protection
Genre: Retro
Computer test: Stelvio 1.0
FEN: rnbq1b2/1p1pp1p1/1k3pr1/2p3pn/4BBQ1/1P1PPP2/1PP4P/RNR1N1K1
Input: Gerd Wilts, 2005-02-04
Last update: Silvio Baier, 2023-03-02 more...
4 - P1067873
Roberto Osorio
Jorge Joaquin Lois

StrateGems 2004
5. Preis
P1067873
(15+13) C+
BP in 22,5
1. b3 g6 2. La3 Lg7 3. Ld6 Lc3 4. Lxc7 Sf6 5. Lxb8 Da5 6. h4 Da3 7. Lh2 a5 8. g3 Ta6 9. Lg2 Te6 10. Kf1 Te3 11. dxe3 d6 12. Dd3 Kd7 13. Da6 bxa6 14. La8 Lb7 15. Sf3 Tc8 16. Lg1 Tc4 17. Sh2 Tg4 18. f4 Kc6 19. Lf2 Kc5 20. Le1 Lf3 21. Ld2 Se4 22. Lc1 Sd2+ 23. Kg1
play all play one stop play next play all
paul: wBc1 circuit (2020-11-29)
more ...
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Natch 3.1 (3 min.)
FEN: B7/4pp1p/p2p2p1/p1k5/5PrP/qPb1PbP1/P1PnP2N/RNB3KR
Reprints: feenschach 155, p. 296, Herb/2004
Input: Gerd Wilts, 2005-05-14
Last update: Alfred Pfeiffer, 2018-12-21 more...
5 - P1068229
Roberto Osorio
Jorge Joaquin Lois

4921 Phénix 142 07-08/2005
P1068229
(14+13) C+
BP in 20,0
1. f3 c6 2. Kf2 Da5 3. Kg3 Dc3 4. dxc3 h5 5. Dd6 h4+ 6. Kg4 h3 7. Dc7 hxg2 8. Sh3 g1=D 9. Lg2 Db6 10. Dxc8+ Dd8 11. Dc7 Th5 12. Dg3 Db6 13. Td1 Dg1 14. Td6 Td5 15. Le3 g5 16. Sd2 Dxa1 17. Lc5 Dg1 18. La3 Db6 19. De1 Td4+ 20. cxd4 Dd8
play all play one stop play next play all
Henrik Juel: d2xDc3xTd4 was too tricky for Natch 3.1, which did not find the solution in half an hour
Stopped at pos. 917 (2018-12-22)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 00:08:50 Minuten.
Keine Lösung: BP 19.0, BP 19.5. (2023-03-01)
more ...
comment
Keywords: Unique Proof Game, Pronkin Theme (d), Promotion (d)
Genre: Retro
Computer test: Stelvio 1.0
FEN: rn1qkbn1/pp1ppp2/2pR4/6p1/3P2K1/B4P1N/PPPNP1BP/4Q3
Reprints: (6) StrateGems 10-12/2007
Input: Gerd Wilts, 2006-01-22
Last update: Silvio Baier, 2023-03-02 more...
6 - P1068639
Roberto Osorio
Jorge Joaquin Lois

1961 Orbit 32 10/2006
Nicolas Dupont gewidmet
3rd Prize
P1068639
(15+13) C+
BP in 20,0
1. Sc3 Sc6 2. Sd5 Tb8 3. Sxe7 Kxe7 4. a4 Kf6 5. a5 Kg6 6. a6 Dh4 7. axb7 Sf6 8. bxc8=S Tb3 9. h3 Lb4 10. Sd6 Te8 11. Sf5 Tee3 12. Sg3 Se5 13. f4 Tf3 14. e4 Tf2 15. S1e2 Tbf3 16. Sc3 c6 17. d3 Td2 18. Sb1 Tff2 19. Se2 Kh5 20. Sg1+ Tfe2#
play all play one stop play next play all
Henrik Juel: Sb1 is actually [Sg1], and Sg1 is [Pa2] promoted on c8.
Testing with Euclide ran out of time. (2011-02-27)
paul: The first 19 moves checked by Euclide in half a day. (2020-12-02)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 01:04:22 Stunde. (hh:mm:ss)
Keine Lösung: BP 19.0, BP 19.5. (2023-03-02)
more ...
comment
Keywords: Unique Proof Game, Interchange
Genre: Retro
Computer test: Stelvio 1.0
FEN: 8/p2p1ppp/2p2n2/4n2k/1b2PP1q/3P3P/1PPrr1P1/RNBQKBNR
Reprints: H30 Vkontakte 2013
H30 Phénix 261/262, p. 10353, 05-06/2016
Input: Gerd Wilts, 2006-12-05
Last update: Silvio Baier, 2023-03-03 more...
7 - P1068645
Roberto Osorio
Jorge Joaquin Lois

Moutecidis Fougiaxis Prentos Jubiläumst. 12/2006
1. ehrende Erwähnung K. Prentos 40 Jahre
P1068645
(13+13) C+
BP in 17,0
1. a4 Sa6 2. a5 Sc5 3. a6 c6 4. axb7 Da5 5. b8=L La6 6. Lg3 0-0-0 7. f4 Kb8 8. Kf2 Tc8 9. f5+ Tc7 10. f6 Lb5 11. fxe7 a6 12. e8=L Ld6 13. Lxf7 Se7 14. La2 Dxa2 15. Kf3 Tf8+ 16. Kg4 Txf1 17. Lf2 Txf2
play all play one stop play next play all
Silvio Baier: C+ (Euclide 0.95) (2010-02-02)
paul: BB Prentos theme (2020-11-29)
comment
Keywords: Unique Proof Game, Ceriani-Frolkin Theme (LL)
Genre: Retro
Computer test: Euclide 0.95
FEN: 1k6/2rpn1pp/p1pb4/1bn5/6K1/8/qPPPPrPP/RNBQ2NR
Reprints: (3) StrateGems 10/2007
Input: Gerd Wilts, 2006-12-21
Last update: A.Buchanan, 2014-05-11 more...
8 - P1070008
Roberto Osorio
Jorge Joaquin Lois

13821 Die Schwalbe 232 08/2008
P1070008
(13+15) C+
BP in 20.5
1. h4 c5 2. Th3 Db6 3. Tb3 Dxb3 4. a3 Da2 5. Sc3 Db1 6. Sh3 Dxc1 7. Dxc1 d6 8. Db1 Sd7 9. Da2 Sdf6 10. 0-0-0 Kd7 11. Da1 Ke6 12. Kb1 Kf5 13. Ka2 Kg4 14. Kb3 Lf5 15. Da2 Tc8 16. Ta1 Tc6 17. Db1 Tb6+ 18. Ka2 Tb3 19. Dd1 b6 20. Sb1 Txh3 21. g3
play all play one stop play next play all
zweifacher Platzwechsel von Dd1 und Ta1, Rückkehr Sb1
Henrik Juel: The double interchange (Lois theme) is a challenge for solvers
Natch 3.1 did little in an hour
Stopped at pos. 5 (2018-12-26)
Moldenhauer: Computerprüfung: C+ Stelvio 1.2 127:03:03 Stunden. (hhh:mm:ss)
Keine Lösung: BP 19.5, BP 20.0 22:17:49 Stunden. (2023-05-18)
more ...
comment
Keywords: Unique Proof Game, Interchange (DT x2), Switchback (S), Lois Theme (DT), Castling
Genre: Retro
Computer test: Stelvio 1.2
FEN: 5bnr/p3pppp/1p1p1n2/2p2b2/6kP/P5Pr/KPPPPP2/RN1Q1B2
Input: Gerd Wilts, 2008-09-05
Last update: Silvio Baier, 2023-08-15 more...
9 - P1070094
Roberto Osorio
Jorge Joaquin Lois

2322 Orbit 38 04/2008
P1070094
(14+14) C+
BP in 17.0
1. c4 Sc6 2. Dc2 Se5 3. Dg6 hxg6 4. f4 Th3 5. Kf2 Tb3 6. axb3 Sg4 7. Kg3 e5 8. Ta6 La3 9. Tf6 a5 10. Kh4 Ta6 11. Kg5 Td6 12. h4 b6 13. Th3 Lb7 14. Tc3 Td3 15. bxa3 Tg3 16. Te3 Lf3 17. Te4 Sxf6#
play all play one stop play next play all
paul: 17.--S4xf6# (2020-11-30)
more ...
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Natch 3.1 (19 m)
FEN: 3qk1n1/2pp1pp1/1p3np1/p3p1K1/2P1RP1P/PP3br1/3PP1P1/1NB2BN1
Input: Gerd Wilts, 2008-09-15
Last update: Alfred Pfeiffer, 2018-12-27 more...
10 - P1080581
Roberto Osorio
Jorge Joaquin Lois

StrateGems 01-03/2006
P1080581
(15+12) C+
BP in 25,5
1. h4 f5 2. h5 Kf7 3. h6 Kg6 4. Sh3 Kh5 5. Sc3 g6 6. Sd5 Lg7 7. Sb4 Lf6 8. Sg1+ Lh4 9. Sf3 Sf6 10. e3 Dg8 11. Ke2 Db3 12. axb3 Tg8 13. Ta6 Tg7 14. Te6 dxe6 15. Sg1 Ld7 16. Kf3 Lb5 17. Le2 Sc6 18. Df1 Td8 19. Ld1 Td3 20. Se2 Sd4+ 21. Kf4 c6 22. exd4 Tg3 23. hxg7 Ld3 24. cxd3 h6 25. Lc2 Sh7 26. Sg1
play all play one stop play next play all
Silvio Baier: 1.h4 f5 2.h5 Kf7 3.h6 Kg6 4.Sh3 Kh5 5.Sc3 g6 6.Sd5 Bg7 7.Sb4 Lf6 8.Sg1+ Lh4 9.Sf3 Sf6 10.e3 Dg8 11.Ke2 Db3 12.ab Tg8 13.Ta6 Tg7 14.Te6 de 15.Sg1 Ld7 16.Kf3 Lb5 17.Le2 Sc6 18.Df1 Td8 19.Ld1 Td3 20.Se2 Sd4+ 21.Kf4 c6 22.ed Tg3 23.hg Ld3 24.cd h6 25.Lc2 Sh7 26.Sg1
Dreifache Rückkehr des Sg1 (2010-02-16)
Henrik Juel: Natch 3.1 did little in more than an hour
Stopped at pos. 1 (2018-12-25)
Vladimir Rey: Update: 2. Preis (source: feenschach 171 2008) (2022-07-28)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 16:43 Minuten.
Keine Lösung: BP 24.5, 25.0. (2023-02-14)
comment
Keywords: Unique Proof Game, Switchback (S)
Genre: Retro
Computer test: Stelvio 1.0
FEN: 8/pp2p1Pn/2p1p1pp/5p1k/1N1P1K1b/1P1P2r1/1PBP1PP1/2B2QNR
Reprints: StrateGems 10-12/2007
Input: Gerd Wilts, 2009-01-11
Last update: Silvio Baier, 2023-03-02 more...
11 - P1080589
Roberto Osorio
Jorge Joaquin Lois

(O5) StrateGems 10-12/2007
P1080589
(14+12) C+
BP in 15,0
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+
play all play one stop play next play all
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)
comment
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...
12 - P1080625
Roberto Osorio
Jorge Joaquin Lois

R133 Problem Paradise 01-03/2006
P1080625
(13+15) C+
BP in 19,5
1. d4 Sc6 2. Dd3 Tb8 3. Da6 bxa6 4. Sf3 Tb5 5. Sh4 Th5 6. Sf5 d5 7. Sh6 gxh6 8. g4 Lg7 9. g5 Le5 10. g6 Sf6 11. g7 Sd7 12. g8=S Sdb8 13. Sf6 exf6 14. dxe5 Se7 15. e6 Sg8 16. e7 Kd7 17. e8=D+ Kd6 18. Da4 Ld7 19. c3 Le8 20. Dd1
play all play one stop play next play all
paul: This PG (with bBe8) was ranked first (judge K. Prentos) (2020-12-01)
more ...
comment
Keywords: Unique Proof Game, Interchange (ss), Pronkin Theme (D), Ceriani-Frolkin Theme (S), Promotion (SD)
Genre: Retro
Computer test: C+ Natch 3.1 No solution for 19.0 moves
FEN: 1n1qb1nr/p1p2p1p/p2k1p1p/3p3r/8/2P5/PP2PP1P/RNBQKB1R
Input: Gerd Wilts, 2009-01-17
Last update: A.Buchanan, 2021-02-20 more...
13 - P1084086
Roberto Osorio
Jorge Joaquin Lois

R349 Probleemblad 01-03/2009
P1084086
(13+15) C+
BP in 18,5
1. f4 Sf6 2. f5 Se4 3. f6 Sxd2 4. Kf2 Sb3 5. Dd2 b6 6. Dh6 gxh6 7. Lg5 Lg7 8. e3 0-0 9. Ld3 Kh8 10. Lg6 fxg6 11. f7 Tg8 12. f8=D Sc1 13. Df3 Te8 14. Dxa8 Kg8 15. Sf3 Kf7 16. Td1 Th8 17. Dd5 Ke8 18. Dg8 Lf8 19. Td5
play all play one stop play next play all
A.Buchanan: Not just hidden castling, but the full Lois theme with sKh8 & sTe8 (2022-02-08)
more ...
comment
Keywords: Unique Proof Game, Phoenix (D), Switchback (l), Lois Theme (kt), Castling Paradox (hidden sk)
Genre: Retro
Computer test: Stelvio 1.17, 50sec
FEN: 1nbqkbQr/p1ppp2p/1p4pp/3R2B1/8/4PN2/PPP2KPP/RNn5
Input: Gerd Wilts, 2009-03-27
Last update: Reto, 2023-04-11 more...
14 - P1085398
Jorge Joaquin Lois
Roberto Osorio

13285 Die Schwalbe 223 02/2007
2. Preis
P1085398
(14+15) C+
BP in 26,5
1. e4 a6 2. Lb5 axb5 3. h4 Ta3 4. h5 Th3 5. a4 c5 6. a5 c4 7. a6 c3 8. dxc3 h6 9. Lg5 hxg5 10. a7 Th6 11. a8=L Ta6 12. h6 b6 13. Ld5 Ta8 14. Lc4 d5 15. h7 Lf5 16. h8=L Lh7 17. Sf3 g6 18. 0-0 Lg7 19. Te1 Kf8 20. Lf1 De8 21. c4 Lc3 22. b3 La5 23. Lb2 Sf6 24. Dd4 Lg8 25. Sd2 Th8 26. Tad1 Sh7 27. Lc1
play all play one stop play next play all
Henrik Juel: Natch 3.1 did little in half an hour
Stopped at pos. 4 (2018-12-26)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:28:13 Minuten. (hh:mm:ss)
Keine Lösung: BP 25.5, BP 26.0. (2023-04-06)
more ...
comment
Keywords: Unique Proof Game, Pronkin Theme (LL), Interchange (tt), Promotion (LL), Castling
Genre: Retro
Computer test: Stelvio 1.11
FEN: rn2qkbr/4pp1n/1p4p1/bp1p2p1/2PQP3/1P3N2/2PN1PP1/2BRRBK1
Reprints: 74 Die Schwalbe 250A, p. 258, 08/2011
Input: Gerd Wilts, 2009-06-08
Last update: Silvio Baier, 2023-08-15 more...
15 - P1106542
Roberto Osorio
Jorge Joaquin Lois
Mario Richter

Quartz 32 07-12/2007
1. Preis
Raican-50-JT
P1106542
(15+12) cooked
BP in 27.0
1. Sf3 e5 2. Sh4 Lb4 3. f3 Lc3 4. bxc3 d5 5. La3 d4 6. Lc5 d3 7. Sa3 dxe2 8. Kxe2 Ld7 9. Kd3 b5 10. De2 b4 11. Kc4 Sc6 12. Kb5 e4 13. Ka6 e3 14. Db5 e2 15. Sc4 e1=L 16. Le2 Lg3 17. The1 Ld6 18. Lg1 Lf8 19. Lf1+ De7 20. Te6 Td8 21. Tae1 Sb8+ 22. Kxa7 g5 23. Ta6 g4 24. Tee6 g3 25. Tec6 Lc8 26. Se5 Td4 27. cxd4 Dd8
play all play one stop play next play all
Cook: 1. Sf3 Sc6 2. Sh4 Sd4 3. f3 Sxe2 4. Kxe2 b6 5. Kd3 Tb8 6. Kc4 Tb7 7. Kb5 g5 8. Ka6 b5 9. Ld3 Tb6+ 10. Kxa7 Tc6 11. Te1 Tc3 12. Te6 g4 13. Ta6 e5 14. bxc3 e4 15. La3 e3 16. Lc5 e2 17. Sa3 e1=S 18. Lf1 b4 19. De2+ De7 20. Db5 Sd3 21. Te1 g3 22. Tee6 Se5 23. Tec6 d5 24. Lg1 d4 25. cxd4 Sd7 26. Sc4 Sb8 27. Se5 Dd8
hans: . (2014-09-09)
Henrik Juel: A record in comment brevity... (2014-09-09)
Michel Caillaud: cooked using Jacobi 0.7.5 with constraints :
1.Sf3 Sc6 2.Sh4 Sd4 3.f3 Sxe2 4.Kxe2 b6 5.Kd3 Tb8 6.Kc4 Tb7 7.Kb5 g5 8.Ka6 b5 9.Ld3 Tb6+ 10.Kxa7 Tc6 11.Te1 Tc3 12.Te6 g4 13.Ta6 e5 14.bxc3 e4 15.La3 e3 16.Lc5 e2 17.Sa3 e1=S 18.Lf1 b4 19.De2+ De7 20.Db5 Sd3 21.Te1 g3 22.Tee6 Se5 23.Tec6 d5 24.Lg1 d4 25.cxd4 Sd7 26.Sc4 Sb8 27.Se5 Dd8 (2021-07-29)
A.Buchanan: Mario: sorry to read this. Is it fixable do you think? (2021-07-29)
more ...
comment
Keywords: Unique Proof Game, Pronkin Theme (l), Switchback (Lsld), Retro Shield
Genre: Retro
Computer test: cooked by Jacobi 0.7.5 with constraints
FEN: 1nbqkbnr/K1p2p1p/R1R5/1Q2N3/1p1P3N/5Pp1/P1PP2PP/5BB1
Reprints: (H3) The Problemist 05/2010
Input: Gerd Wilts, 2010-06-02
Last update: A.Buchanan, 2021-07-31 more...
16 - P1109637
Silvio Baier
Roberto Osorio
Mario Richter
Juha M. Saukkola
Göran Wicklund
Jorge Joaquin Lois

(G) Die Schwalbe 233 10/2008
P1109637
(12+13)
Nach 13,5 Zügen stehen die KK in gegenüberliegenden Eckfeldern
Doppellängstzüger
Joost de Heer: Lots of duals:
1.Sc3 Sa6 2.Sh3 Sf6 3.Sg5 Sd5 4.Se6 Se3 5.Sxf8 Sxd1 6.Se6 Sxb2 7.Sxd8 O-O 8.Sc6 Sc4 9.Ba3 Sxa3 10.O-O-O Sb4 11.Sxe7+ Kh8 12.Sb1 Sxa2+ 13.Kb2 Sc4+ 14.Ka1 (2023-07-16)
comment
Keywords: Maximummer, Non-Unique Proof Game
Genre: Retro, Fairies
FEN: r1b2r1k/ppppNppp/8/8/2n5/8/n1PPPPPP/KN1R1B1R
Input: Gerd Wilts, 2010-07-03
Last update: James Malcom, 2021-08-24 more...
17 - P1177782
Roberto Osorio
Jorge Joaquin Lois

14636 Die Schwalbe 245 10/2010
P1177782
(12+15) C+
BP in 21,0
1. e4 h5 2. Dg4 hxg4 3. a4 g3 4. Ta3 gxh2 5. Tb3 hxg1=L 6. Th6 a5 7. Ta6 Sc6 8. Tbb6 Tb8 9. Lb5 Lxf2+ 10. Kf1 Ld4 11. Ta8 Lc3 12. Tba6 b6 13. dxc3 Tb7 14. Sd2 Ta7 15. Sb3 Lb7 16. Tc8 Ta8 17. Sc5 Tb8 18. Ta8 La6 19. b3 Tb7 20. Tab8 Ta7 21. Sb7 Ta8
play all play one stop play next play all
Henrik Juel: The keyword Pure Round Trip (tt) suggests roundtrips by two black rooks; in fact Ta8 does a double roundtrip (2018-12-29)
Henrik Juel: Natch 3.1 did not find the solution in an hour
Stopped at pos. 75
The puzzle in the NW corner is almost impossible for a solver like Natch, whereas a human solver would find it simple, if he got that far is the solving process
The double roundtrip is automatic (2018-12-29)
ras@bsiag.com: Actually, this problem is solvable by computer, tested by Stelvio 0.92 and found to be correct (just one of many PDB problems that will be either C+ or C- in the near future). It took a bit more than 1h. (2022-12-08)
comment
Keywords: Unique Proof Game, Pure Round Trip (tt), Ceriani-Frolkin Theme (l)
Genre: Retro
Computer test: Stelvio 1.0
FEN: rRRqkbnr/1Nppppp1/bpn5/pB6/P3P3/1PP5/2P3P1/2B2K2
Input: Gerd Wilts, 2010-10-07
Last update: Silvio Baier, 2023-03-02 more...
18 - P1240688
Roberto Osorio
Jorge Joaquin Lois

5629 Phénix 172 04/2008
P1240688
(13+13) C+
BP in 21,5
1. h2-h4 g7-g5 2. h4xg5 c7-c5 3. Th1-h6 c5-c4 4. Th6-b6 a7xb6 5. Sb1-c3 Ta8-a3 6. Sc3-b5 Ta3-e3 7. f2xe3 c4-c3 8. d2xc3 h7-h5 9. Dd1-d5 Th8-h6 10. Lc1-d2 Th6-f6 11. 0-0-0 Tf6xf1 12. Ld2-e1 Tf1-f4 13. Dd5-f3 f7-f5 14. Td1-d6 Tf4-d4 15. Td6-f6 e7xf6 16. Sb5-a3 Dd8-e7 17. Sa3-b1 De7-a3 18. Le1-d2 Da3-a8 19. a2-a4 Lf8-a3 20. Kc1-d1 Ke8-e7 21. Kd1-e1 Ke7-d6 22. Ld2-c1
play all play one stop play next play all
Mario Richter: I do not know the intended solution, but the following play does the job:
1.h2-h4 g7-g5 2.h4xg5 c7-c5 3.Rh1-h6 c5-c4 4.Rh6-b6 a7xb6 5.Nb1-c3 Ra8-a3 6.Nc3-b5 Ra3-e3 7.f2xe3 c4-c3 8.d2xc3 h7-h5 9.Qd1-d5 Rh8-h6 10.Bc1-d2 Rh6-f6 11.0-0-0 Rf6xf1 12.Bd2-e1 Rf1-f4 13.Qd5-f3 f7-f5 14.Rd1-d6 Rf4-d4 15.Rd6-f6 e7xf6 16.Nb5-a3 Qd8-e7 17.Na3-b1 Qe7-a3 18.Be1-d2 Qa3-a8 19.a2-a4 Bf8-a3 20.Kc1-d1 Ke8-e7 21.Kd1-e1 Ke7-d6 22.Bd2-c1
I think the theme is the so-called Lois-theme, here executed by wK and wBc1 (2014-10-02)
Henrik Juel: Thanks, Mario.
Besides the interchange by two men doubled (Lois), there is a nice roundtrip by Sb1 and an unlikely castling; very good (2014-10-02)
Henrik Juel: Natch 3.1 did little in half an hour
Stopped at pos. 2 (2018-12-27)
more ...
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Moldenhauer Computerprüfung: C+ Stelvio 1.11 00:43:00 Minuten. (hh:mm:ss) Keine Lösung: BP 20.5, BP 21.0.
FEN: qnb3n1/1p1p4/1p1k1p2/5pPp/P2r4/b1P1PQ2/1PP1P1P1/1NB1K1N1
Input: Gerd Wilts, 2012-06-04
Last update: A.Buchanan, 2023-03-23 more...
19 - P1243394
Nicolas Dupont
Roberto Osorio
Jorge Joaquin Lois

15121 Die Schwalbe 253 02/2012
P1243394
(12+14) C+
KBP in 17.0
1. d4 g6 2. d5 Lh6 3. d6 Lg5 4. dxc7 d5 5. a4 Dd7 6. a5 Dg4 7. a6 Lf5 8. c8=L Sh6 9. Ld7 Sxd7 10. axb7 Sf6 11. b8=L Sh5 12. Ld6 0-0-0 13. Lcf4 Txd6 14. e3 Tf6 15. Lb8 a5 16. La6+ Kxb8 17. Lc8 Txc8
play all play one stop play next play all
paul: BB Prentos theme (2020-12-02)
more ...
comment
Keywords: Unique Proof Game, Ceriani-Frolkin Theme (LL), Anti-Pronkin (LL)
Genre: Retro
Computer test: Euclide
FEN: 1kr5/4pp1p/5rpn/p2p1bbn/6q1/4P3/1PP2PPP/RN1QK1NR
Input: Mario Richter, 2012-06-29
Last update: Arnold Beine, 2021-04-05 more...
20 - P1301930
Roberto Osorio
11018 feenschach (209) 09-10/2014
P1301930
(14+15) cooked
BP 23.5

play all play one stop play next play all
Cook: 1. Sf3 f5 2. Se5 f4 3. Sxd7 Kxd7 4. h4 Kc6 5. Th3 Lf5 6. Tb3 Le4 7. Tb6+ cxb6 8. e3 Dc7 9. Ke2 Kb5 10. De1 Sc6 11. Dd1 Td8 12. De1 Td5 13. Dd1 Th5 14. De1 g5 15. Dd1 Lg7 16. De1 Le5 17. Dd1 Sf6 18. De1 Td8 19. Dd1 Td6 20. De1 Te6 21. Dd1 Ld6 22. De1 Se5 23. Dd1 Dc6 24. Ke1+
Henrik Juel: Seems incorrect
1.Sf3 f5 2.Se5 f4 3.Sxd7 Sc6 4.Sb6 cxb6 5.h4 Lf5 6.Th3 Le4 7.Tg3 Dc7 8.Tg5 0-0-0 9.Th5 Td5 10.e3 Txh5 11.Ke2 g5 12.De1 Lg7 13.Dd1 Le5 14.De1 Sf6 15.Dd1 Td8 16.De1 Td6 17.Dd1 Te6 18.De1 Ld6 19.Dd1 Se5 20.De1 Kd7 21.Dd1 Kc6 22.De1 Kb5 23.Dd1 Dc6 24.Ke1+ (2015-04-25)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.11 00:08:34 Minuten. (hh:mm:ss)
Keine Lösung: BP 22.5, BP 23.0.
Beispiel: 1.Sf3 f5 2.Se5 f4 3.Sxd7 Kxd7 4.h4 Kc6 5.Th3 Lf5
6.Tb3 Le4 7.Tb6+ cxb6 8.e3 Dc7 9.Ke2 Kb5 10.De1 Sc6 11.Dd1 Td8
12.De1 Td5 13.Dd1 Th5 14.De1 g5 15.Dd1 Lg7 16.De1 Le5
17.Dd1 Sf6 18.De1 Td8 19.Dd1 Td6 20.De1 Te6 21.Dd1 Ld6
22.De1 Se5 23.Dd1 Dc6 24.Ke1+ (2023-04-24)
comment

Genre: Retro
FEN: 8/pp2p2p/1pqbrn2/1k2n1pr/4bp1P/4P3/PPPP1PP1/RNBQKB2
Input: Frank Müller, 2015-04-24
Last update: Silvio Baier, 2023-08-15 more...
21 - P1339426
Jorge Joaquin Lois
Roberto Osorio

StrateGems 2013
1. Preis
StrateGems 2013
P1339426
(12+12) C+
PG in 23.0
1. Sg1-f3 Sb8-c6 2. Sf3-d4 Sc6-e5 3. Sd4-c6 d7xc6 4. Sb1-c3 Lc8-e6 5. Sc3-a4 Le6-b3 6. Sa4-b6 c7xb6 7. g2-g4 Dd8-c7 8. g4-g5 0-0-0 9. g5-g6 Td8-d3 10. g6xh7 g7-g5 11. e2-e4 Se5-g6 12. e4-e5 Lf8-g7 13. e5-e6 Lg7-e5 14. c2xb3 Sg8-f6 15. b3-b4 Th8-d8 16. h7-h8=S a7-a5 17. Sh8xf7 Sg6-h8 18. Sf7-d6 e7xd6 19. b4xa5 Dc7-h7 20. e6-e7 Td8-d7 21. e7-e8=S Kc8-d8 22. Se8-c7 Sf6-e8 23. Sc7-a6 b7xa6
play all play one stop play next play all
Henrik Juel: Pa6,b6,c6,d6 look as if they have moved forward one step, but in reality they are [Pb7,c7,d7,e7], who have captured four knights, two of which were promoted
An original form of Impostors, along with well-hidden double Frolkin-Ceriani (2017-09-15)
Vladimir Rey: 1. Sf3 Sc6 2. Sd4 Se5 3. Sc6 dxc6 4. Sc3 Le6 5. Sa4 Lb3 6. Sb6 cxb6 7. g4 Dc7 8. g5 0-0-0 9. g6 Td3 10. gxh7 g5 11. e4 Sg6 12. e5 Lg7 13. e6 Le5 14. cxb3 Sf6 15. b4 Thd8 16. h8=S a5 17. Sxf7 Sh8 18. Sd6+ exd6 19. bxa5 Dh7 20. e7 Td7 21. e8=S Kd8 22. Sc7 Se8 23. Sa6 bxa6 (2022-08-03)
more ...
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Euclide 1.01
FEN: 3kn2n/3r3q/pppp4/P3b1p1/8/3r4/PP1P1P1P/R1BQKB1R
Reprints: H1 The Problemist 25-1, p. 38, 01/2015
Input: A.Buchanan, 2017-09-15
Last update: Alfred Pfeiffer, 2017-09-15 more...
22 - 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...
23 - 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...
24 - P1382408
Thierry Le Gleuher
Gunter Jordan
Raúl Jordan
Roberto Osorio

15 feenschach 237, p. 224, 09-10/2019
P1382408
(12+11) C+
BP in 9.5
1. d4 a5 2. d5 a4 3. d6 a3 4. dxc7 axb2 5. cxb8=D bxc1=D 6. Dxc8 Dg5 7. Dc4 Dxg2 8. Dxf7+ Kxf7 9. Lxg2 Ke8 10. Lf1
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
A.Buchanan: Can anyone send me the full results of this JT please? I have an unpublished one which is similar in theme, and I want to confirm that I’m not anticipated. I will load all problems into PDB if they’re not already here (2020-11-26)
comment
Keywords: Unique Proof Game, Homebase (2), Prentos Theme (Dd), Switchback (Lk), Ceriani-Frolkin Theme (Dd)
Genre: Retro
FEN: r2qkbnr/1p1pp1pp/8/8/8/8/P1P1PP1P/RN1QKBNR
Input: Gunter Jordan, 2020-11-25
Last update: A.Buchanan, 2021-02-20 more...
25 - P1384484
Roberto Osorio
Jorge Joaquin Lois

Problemaz 2007
2. Preis
P1384484
(14+13) C+
BP in 16.5
1. f3 e6 2. Kf2 La3 3. bxa3 h5 4. a4 h4 5. Sa3 h3 6. Tb1 hxg2 7. Tb6 gxh1=L 8. Td6 b6 9. Lh3 La6 10. Lf5 Ld3 11. cxd3 Lg2 12. Sc2 Lh3 13. La3 Lg4 14. Da1 Lh5 15. Df6 Lg6 16. d4 Lh7 17. Lxh7
play all play one stop play next play all
more ...
comment
Keywords: Prenix (l), Promotion (l)
Genre: Retro
FEN: rn1qk1nr/p1pp1ppB/1p1RpQ2/8/P2P4/B4P2/P1NPPK1P/6N1
Input: fs/hg, 2020-12-30
Last update: James Malcom, 2022-08-06 more...
26 - P1384602
Roberto Osorio
Orbit 2011
2. Preis
P1384602
(12+15) C+
BP in 18,0
Henrik Juel: Solution
1. Bg2-g4 Sg8-f6 2. Bg4-g5 Sf6-e4 3. Bg5-g6 Bh7xg6
4. Ba2-a4 Th8-h5 5. Ba4-a5 Th5-e5 6. Ba5-a6 Bg6-g5
7. Ba6xb7 Ba7-a5 8. Bb2-b4 Ta8-a6 9. Bb4-b5 Ta6-g6
10. Bb5-b6 Sb8-a6 11. Bb7-b8=S Bd7-d6 12. Sb8-d7 Ke8xd7
13. Bb6-b7 Kd7-e6 14. Bb7-b8=S Ke6-f6 15. Sb8-d7 Dd8xd7
16. Bh2-h4 Dd7-g4 17. Bh4-h5 Lc8-e6 18. Bh5-h6 Bg7xh6 (2021-01-01)
Henrik Juel: C++ Euclide 1.01
The cross-capture h7xPg6 and g7xPh6 permits Black to use only four rook moves
White must work hard to get rid of his pawns [Pa2,b2]
It is done by promoting both to S on b8 and then getting the knights captured on d7 (2021-01-01)
comment
Keywords: Unique Proof Game, Homebase (w)
Genre: Retro
Computer test: Stelvio 1.25, 8sec
FEN: 5b2/2p1pp2/n2pbkrp/p3r1p1/4n1q1/8/2PPPP2/RNBQKBNR
Input: fs/hg, 2020-12-30
Last update: A.Buchanan, 2023-06-29 more...
27 - P1384604
Roberto Osorio
Orbit 2014
1. Preis
P1384604
(14+12) C+
BP in 16,0
1. a4 Sc6 2. a5 Tb8 3. a6 bxa6 4. h4 Tb3 5. h5 Sb8 6. h6 gxh6 7. cxb3 Lg7 8. Dc2 Lf6 9. De4 Lh4 10. d3 Sf6 11. Lf4 Tg8 12. Sd2 Tg3 13. fxg3 c6 14. gxh4 Da5 15. Lg3 Da4 16. bxa4 Sg8
play all play one stop play next play all
Henrik Juel: The problem should be labelled C+
It is C++ Euclide 1.01, meaning that testing with 16.0 moves shows a unique solution and testing with 15.5 moves shows no solutions (2021-01-02)
more ...
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Stelvio 1.25, 2sec
FEN: 1nb1k1n1/p2ppp1p/p1p4p/8/P3Q2P/3P2B1/1P1NP1P1/R3KBNR
Input: fs/hg, 2020-12-30
Last update: Reto, 2023-05-29 more...
28 - P1384638
Nicolas Dupont
Roberto Osorio

Quartz 2010-2012
1. Preis
P1384638
(15+13) C+
KBP 21.0
1. e4 c5 2. e5 Db6 3. e6 Db3 4. axb3 f5 5. Ta6 f4 6. Tc6 a5 7. La6 a4 8. Ke2 f3 9. Kd3 fxg2 10. Sf3 a3 11. Te1 g1=D 12. Te5 Dg5 13. Ke4 De3 14. dxe3 a2 15. Ld2 a1=D 16. Lb4 Da5 17. Txc8 Dd8 18. Tc6 Da5 19. Dd2 Da1 20. Sa3 Dg1 21. c3 Dg5
play all play one stop play next play all
paul: 1.Pe2-e4 Pc7-c5 2.Pe4-e5 Qd8-b6 3.Pe5-e6 Qb6-b3 4.Pa2xb3 Pf7-f5 5.Ra1-a6 Pf5-f4 6.Ra6-c6 Pa7-a5 7.Bf1-a6 Pa5-a4 8.Ke1-e2 Pf4-f3 9.Ke2-d3 Pf3xg2 10.Sg1-f3 Pa4-a3 11.Rh1-e1 Pg2-g1=Q 12.Re1-e5 Qg1-g5 13.Kd3-e4 Qg5-e3 14.Pd2xe3 Pa3-a2 15.Bc1-d2 Pa2-a1=Q 16.Bd2-b4 Qa1-a5 17.Rc6xc8 Qa5-d8 18.Rc8-c6 Qd8-a5 19.Qd1-d2 Qa5-a1 20.Sb1-a3 Qa1-g1 21.Pc2-c3 Qg1-g5.
La Dame noire promue effectue 5 thèmes différents consécutivement, sans aucune capture dans son
parcours ! 17...Dd8 (Pronkin) 18...Da5 (switchback) 19...Da1 (Donati) 20...Dg1 (anti-Pronkin) et
21...Dg5 (coup répété). Dans le language des "parties justificatives du futur" il s'agit donc d'un (PR & SW & DO & AP & CR)(d), une nouveauté probablement (auteurs). (2021-08-25)
Henrik Juel: C+ Euclide 1.01 (27 minutes) (2021-08-25)
Henrik Juel: In case some kind poster wants to post the solution to this fine proof game, here it is in german
1. Be2-e4 Bc7-c5 2. Be4-e5 Dd8-b6 3. Be5-e6 Db6-b3
4. Ba2xb3 Bf7-f5 5. Ta1-a6 Bf5-f4 6. Ta6-c6 Ba7-a5
7. Lf1-a6 Ba5-a4 8. Ke1-e2 Bf4-f3 9. Ke2-d3 Bf3xg2
10. Sg1-f3 Ba4-a3 11. Th1-e1 Bg2-g1=D 12. Te1-e5 Dg1-g5
13. Kd3-e4 Dg5-e3 14. Bd2xe3 Ba3-a2 15. Lc1-d2 Ba2-a1=D
16. Ld2-b4 Da1-a5 17. Tc6xc8 Da5-d8 18. Tc8-c6 Dd8-a5
19. Dd1-d2 Da5-a1 20. Sb1-a3 Da1-g1 21. Bc2-c3 Dg1-g5 (2021-08-25)
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Henrik Juel (2021-08-25): C+ Euclide 1.01 (27 minutes)
FEN: rn2kbnr/1p1pp1pp/B1R1P3/2p1R1q1/1B2K3/NPP1PN2/1P1Q1P1P/8
Input: fs/hg, 2020-12-30
Last update: Mario Richter, 2021-08-26 more...
29 - P1384649
Jorge Joaquin Lois
Roberto Osorio

Springaren 2009-2010
6. Preis
Julturnering
P1384649
(14+15) C+
BP in 15
1. e4 a6 2. Lb5 axb5 3. d4 Ta6 4. d5 Th6 5. d6 f6 6. dxe7 Kf7 7. e8=L+ Ke7 8. Lg6 b4 9. Lf5 Ke8 10. e5 De7 11. e6 Dc5 12. e7 Kf7 13. e8=L+ Ke7 14. Leg6 hxg6 15. Kf1 Ke8
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 1 Sekunde.
Keine Lösung: BP 14.0, BP 14.5.
Notation: 1.e4 a6 2.Lb5 axb5 3.d4 Ta6 4.d5 Th6 5.d6 f6 6.dxe7 Kf7
7.e8L+ Ke7 8.Lg6 b4 9.Lf5 Ke8 10.e5 De7 11.e6 Dc5 12.e7 Kf7
13.e8L+ Ke7 14.Leg6 hxg6 15.Kf1 Ke8 (2023-03-01)
comment

Genre: Retro
Computer test: Stelvio 1.0
FEN: 1nb1kbnr/1ppp2p1/5ppr/2q2B2/1p6/8/PPP2PPP/RNBQ1KNR
Input: fs/hg, 2020-12-30
Last update: Silvio Baier, 2023-11-14 more...
30 - P1384699
Jorge Joaquin Lois
Roberto Osorio

WCCC 2017
1. Preis
Champagner TT, Abteilung A
P1384699
(12+14) C+
BP 18
paul: 1.Sc3 a5 2.Sd5 a4 3.S×e7 L×e7 4.d4 Lg5 5.d5 Lh6 6.d6 Dh4 7.d×c7 d5 8.c4 Lf5 9.c8=L Lb1 10.Ld7+ S×d7 11.c5 0-0-0 12.c6 Kb8 13.c7+ Ka8 14.c8=S f5 15.Se7 S×e7 16.e4 The8 17.Lb5 Sf8 18.Ld7 T×d7 (2022-09-30)
comment

Genre: Retro
FEN: k3rn2/1p1rn1pp/7b/3p1p2/p3P2q/8/PP3PPP/RbBQK1NR
Input: fs/hg, 2020-12-30
Last update: fs/hg, 2020-12-30 more...
31 - P1384784
Bernd Graefrath
Roberto Osorio

48 feenschach 237, p. 227, 09-10/2019
P1384784
(11+11) C+
BP in 9,0
1. a4 g5 2. a5 g4 3. a6 g3 4. axb7 gxh2 5. bxc8=D hxg1=S 6. Dxb8 Sxe2 7. Dxa7 Sxc1 8. Dxc1 Txa7 9. Dd1 Ta8
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
A.Buchanan: "genau ein Stein eine zweizügige Rückkehr vollführt" I don't understand this: "exactly one piece makes a two-move switchback?" Which piece is this? Structurally both sides seem to be making the same kinds of moves: 7 with the promoter, and then 2 with a capturer (2021-01-01)
more ...
comment
Keywords: Unique Proof Game, Homebase (2), Prentos Theme (Ds), Switchback (Dt), Promotion (Ds), Ceriani-Frolkin Theme (Ds)
Genre: Retro
FEN: r2qkbnr/2pppp1p/8/8/8/8/1PPP1PP1/RN1QKB1R
Input: Gunter Jordan, 2020-12-31
Last update: A.Buchanan, 2021-02-20 more...
32 - P1386611
Silvio Baier
Thierry Le Gleuher
Bernd Graefrath
Roberto Osorio
Gregor Werner

98 feenschach 237, p. 232, 09-10/2019
P1386611
(12+11) C+
BP in 9.0
1. f4 a5 2. f5 a4 3. f6 a3 4. fxg7 axb2 5. gxf8=L bxa1=D 6. Lxe7 Df6 7. Lxd8 Dxf1+ 8. Kxf1 Kxd8 9. Ke1 Ke8
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.

In der Originalquelle f 237 stand eine falsche Lösung. Die hier angegebene Lösung ist richtig.
A.Buchanan: Under-promotion & excelsior are meaningless for PGs (2021-02-19)
comment
Keywords: Unique Proof Game, Ceriani-Frolkin Theme (Ld), Homebase (2), Prentos Theme (Ld), Switchback (Kk), Promotion (Ld)
Genre: Retro
FEN: rnb1k1nr/1ppp1p1p/8/8/8/8/P1PPP1PP/1NBQK1NR
Input: Gunter Jordan, 2021-02-18
Last update: A.Buchanan, 2021-02-19 more...
33 - P1387696
Silvio Baier
Thierry Le Gleuher
Bernd Graefrath
Ralf Krätschmer
Roberto Osorio

131 feenschach 237, p. 235, 09-10/2019
P1387696
(11+11) C+
BP in 10.0
1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 hxg2 5. exd8=L gxh1=S 6. Lxc7 Sxg3 7. Le5 Sxe2 8. Lxg7 Sxc1 9. Dxc1 Lxg7 10. Dd1 Lf8
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
Henrik Juel: tiny typo: 6... Sg3, not Sxg3
correcting this should enable the animation (2021-03-22)
comment
Keywords: Unique Proof Game, Homebase (2), Prentos Theme (Ls), Switchback (Dl), Promotion (Ls)
Genre: Retro
FEN: rnb1kbnr/pp1p1p2/8/8/8/8/PPPP3P/RN1QKBN1
Input: Gunter Jordan, 2021-03-22
Last update: A.Buchanan, 2021-04-06 more...
34 - P1388631
Silvio Baier
Gunter Jordan
Raúl Jordan
Roberto Osorio

154 feenschach 237, p. 238, 09-10/2019
P1388631
(11+12) C+
BP in 9.0
1. f4 a5 2. f5 a4 3. f6 a3 4. fxg7 axb2 5. gxf8=S bxc1=D 6. Se6 Dxb1 7. Sxd8 Dxa2 8. Txa2 Kxd8 9. Ta1 Ke8
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
A.Buchanan: Excelsior is never a feature for proof games. particularly distinguishing white from black excelsiors is meaningful for d#, s# & possibly h#. Under-promotions are meaningless for proof games, and makes search much harder. More is less for tags. Maybe we can have "theme or derived" feature like in WinChloe in future which would allow these things to be derived, but they should not form part of the core tagging. I am concerned that there is some LaTeX file somewhere where these nonsense tags are effectively being treated as the master data source and could be reinjected to PDB on a whim. (2021-04-16)
A.Buchanan: More positively, please start using the Future PG tag. Here the Prentos, prenix and switchback are doubled features. For homebase, I think one might consider "trapped hole" as a defect: here d8 can only reasonably be captured by a knight, but it's probably not worth being a tag. Here, the doubled prenix including missing wSb1 is an important mitigation. (2021-04-16)
more ...
comment
Keywords: Unique Proof Game, Homebase (2), Prentos Theme (Sd), Switchback (Tk), Promotion (Sd), Ceriani-Frolkin Theme (Sd), Prenix (Sd), Future Proof Game (Prentos+Prenix+Sback)
Genre: Retro
FEN: rnb1k1nr/1ppppp1p/8/8/8/8/2PPP1PP/R2QKBNR
Input: Gunter Jordan, 2021-04-15
Last update: A.Buchanan, 2021-04-16 more...
35 - P1388682
Thierry Le Gleuher
Gunter Jordan
Raúl Jordan
Ralf Krätschmer
Roberto Osorio

155 feenschach 237, p. 238, 09-10/2019
P1388682
(12+11) C+
BP in 9.0
1. g4 b5 2. g5 b4 3. g6 b3 4. gxh7 bxc2 5. hxg8=S cxb1=D 6. Sxe7 Dg6 7. Sxc8 Dxg1 8. Txg1 Dxc8 9. Th1 Dd8
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
more ...
comment
Keywords: Unique Proof Game, Homebase (2), Prentos Theme (Sd), Switchback (Td), Promotion (Sd), Prenix (S), Ceriani-Frolkin Theme (Sd), Future Proof Game (Prentos+Sback)
Genre: Retro
FEN: rn1qkb1r/p1pp1pp1/8/8/8/8/PP1PPP1P/R1BQKB1R
Input: Gunter Jordan, 2021-04-16
Last update: A.Buchanan, 2021-04-17 more...
36 - P1389155
Silvio Baier
Thierry Le Gleuher
Ralf Krätschmer
Roberto Osorio

169 feenschach 237, p. 239, 09-10/2019
P1389155
(11+10) C+
BP in 9.5
1. b4 f5 2. b5 f4 3. b6 f3 4. bxa7 fxg2 5. axb8=S gxh1=T 6. Sxd7 Txh2 7. Sxf8 Txf2 8. Sxh7 Txh7 9. Kxf2 Th8 10. Ke1
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
Moldenhauer: Computerprüfung: C+ Stelvio 1.4 03:05:53 Stunden. (hh:mm:ss)
Keine Lösung: BP 9.0. (2023-07-23)
comment
Keywords: Unique Proof Game, Excelsior black, Excelsior white, Homebase (2), Prentos Theme (St), Switchback (Kt), under-promotion (St)
Genre: Retro
Computer test: Stelvio 1.4
FEN: r1bqk1nr/1pp1p1p1/8/8/8/8/P1PPP3/RNBQKBN1
Input: Gunter Jordan, 2021-05-01
Last update: Silvio Baier, 2023-08-15 more...
37 - P1389187
Thierry Le Gleuher
Ralf Krätschmer
Roberto Osorio

170 feenschach 237, p. 239, 09-10/2019
P1389187
(11+11) C+
BP in 9.5
1. b4 g5 2. b5 g4 3. b6 g3 4. bxa7 gxh2 5. axb8=S hxg1=T 6. Sc6 Txg2 7. Sxd8 Txf2 8. Sxb7 Lxb7 9. Kxf2 Lc8 10. Ke1
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
Moldenhauer: Computerprüfung: C+ Stelvio 1.4 04:00:17 Stunden. (hh:mm:ss)
Keine Lösung: BP 9.0. (2023-07-23)
comment
Keywords: Unique Proof Game, Homebase (2), Prentos Theme (St), Switchback (Kl), under-promotion (St), Ceriani-Frolkin Theme (St), Prenix (S), Future Proof Game (Prentos+Sback)
Genre: Retro
Computer test: Stelvio 1.4
FEN: r1b1kbnr/2pppp1p/8/8/8/8/P1PPP3/RNBQKB1R
Input: Gunter Jordan, 2021-05-02
Last update: Silvio Baier, 2023-08-15 more...
38 - P1389374
Silvio Baier
Thierry Le Gleuher
Gunter Jordan
Raúl Jordan
Ralf Krätschmer
Roberto Osorio

175 feenschach 237, p. 240, 09-10/2019
P1389374
(11+11) C+
BP in 9.5
1. b4 f5 2. b5 f4 3. b6 f3 4. bxc7 fxg2 5. cxd8=S gxf1=L 6. Se6 Lxe2 7. Sxf8 Lxd1 8. Sxh7 Txh7 9. Kxd1 Th8 10. Ke1
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
more ...
comment
Keywords: Unique Proof Game, Excelsior black, Excelsior white, Homebase (2), Prentos Theme (Sl), Switchback (Kt), under-promotion (Sl)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.4 02:01:02 Stunden.(hh:mm:ss) Keine Lösung: BP 9.0.
FEN: rnb1k1nr/pp1pp1p1/8/8/8/8/P1PP1P1P/RNB1K1NR
Input: Gunter Jordan, 2021-05-07
Last update: A.Buchanan, 2023-07-29 more...
39 - P1389383
Thierry Le Gleuher
Gunter Jordan
Raúl Jordan
Roberto Osorio

176 feenschach 237, p. 240, 09-10/2019
P1389383
(11+11) C+
BP in 9.5
1. f4 h5 2. f5 h4 3. f6 h3 4. fxg7 hxg2 5. gxf8=S gxf1=L 6. Se6 Lxe2 7. Sxd8 Lxd1 8. Sxb7 Lxb7 9. Kxd1 Lc8 10. Ke1
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
more ...
comment
Keywords: Unique Proof Game, Excelsior black, Excelsior white, Homebase (2), Prentos Theme (Sl), Switchback (Kl), under-promotion (Sl)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.4 04:29:10 Stunden.(hh:mm:ss) Keine Lösung: BP 9.0.
FEN: rnb1k1nr/p1pppp2/8/8/8/8/PPPP3P/RNB1K1NR
Input: Gunter Jordan, 2021-05-08
Last update: A.Buchanan, 2023-07-29 more...
40 - P1389465
Silvio Baier
Roberto Osorio

179 feenschach 237, p. 240, 09-10/2019
P1389465
(12+11) C+
BP in 9.5
1. h4 f5 2. h5 f4 3. h6 f3 4. hxg7 fxe2 5. gxf8=S exf1=L 6. Sg6 Ld3 7. Sxe7 Lxc2 8. Sxc8 Dxc8 9. Dxc2 Dd8 10. Dd1
play all play one stop play next play all
Silvio-Baier-40-JT: Thema: Gesucht waren eindeutige orthodoxe Beweispartien mit weißer und schwarzer Homebasestellung, wobei auf jeder Seite ein Bauer umwandeln und von einer Figur (keinem Bauern) geschlagen werden sollte und zudem genau ein Stein eine zweizügige Rückkehr vollführt.
more ...
comment
Keywords: Unique Proof Game, Excelsior black, Excelsior white, Homebase (2), Prentos Theme (Sl), Switchback (Dd), under-promotion (Sl)
Genre: Retro
Computer test: C+ Euclide 1.01 (more than 2 hours) Natch 3.1 found no solutions in 9.0 moves
FEN: rn1qk1nr/pppp3p/8/8/8/8/PP1P1PP1/RNBQK1NR
Input: Gunter Jordan, 2021-05-11
Last update: Silvio Baier, 2024-01-24 more...
41 - P1394895
Roberto Osorio
Jorge Joaquin Lois

WCCC Rhodes 10/2021
2nd Prize Champagne-TT A
P1394895
(13+13) C+
BP in 22.0
1. a2-a4 f7-f5 2. a4-a5 f5-f4 3. a5-a6 f4-f3 4. Ta1-a5 f3xg2 5. Sg1-f3 g2-g1=L 6. Lf1-h3 g7-g5 7. Lh3-f5 g5-g4 8. h2-h3 g4-g3 9. Sf3-h2 g3-g2 10. f2-f3 Lg1-d4 11. Ta5-d5 Ld4-c3 12. d2xc3 g2-g1=L 13. Lc1-f4 Lg1-c5 14. Lf4-g3 Lc5-b4 15. c3xb4 h7-h5 16. Sb1-c3 h5-h4 17. Dd1-b1 h4xg3 18. Sc3-d1 g3-g2 19. c2-c3 g2-g1=L 20. Ke1-f1 Lg1-b6 21. e2-e3 Lb6-a5 22. b4xa5 b7xa6
play all play one stop play next play all
Moldenhauer: Computerprüfung: Auch C+ Stelvio 1.11 in 37 Sekunden.
Keine Lösung: BP 21.0, BP 21.5. Notation:
1. a2-a4 f7-f5 2. a4-a5 f5-f4 3. a5-a6 f4-f3 4.Ta1-a5 f3xg2
5.Sg1-f3 g2-g1=L 6.Lf1-h3 g7-g5 7.Lh3-f5 g5-g4 8. h2-h3 g4-g3
9.Sf3-h2 g3-g2 10. f2-f3 Lg1-d4 11.Ta5-d5 Ld4-c3 12.d2xc3 g2-g1=L
13.Lc1-f4 Lg1-c5 14.Lf4-g3 Lc5-b4 15. c3xb4 h7-h5 16.Sb1-c3 h5-h4
17.Dd1-b1 h4xg3 18.Sc3-d1 g3-g2 19. c2-c3 g2-g1=L 20.Ke1-f1 Lg1-b6
21. e2-e3 Lb6-a5 22. b4xa5 b7xa6.
Welches Format braucht man im Player? Lang oder kurz? Format aus Stelvio?
Soll man die Kurzversion aus Fritz nehmen?
Danke! (2023-04-19)
comment
Keywords: Unique Proof Game, Champagne-TT (2021)
Genre: Retro
FEN: rnbqkbnr/p1ppp3/p7/P2R1B2/8/2P1PP1P/1P5N/1Q1N1K1R
Input: A.Buchanan, 2021-10-25
Last update: Silvio Baier, 2023-11-14 more...
42 - P1394896
Roberto Osorio
WCCC Rhodes 10/2021
3rd Prize Champagne-TT A
P1394896
(13+15) C+
PG in 19.0
1. b3 e5 2. La3 e4 3. Ld6 Lxd6 4. g4 Se7 5. g5 0-0 6. g6 Te8 7. gxh7+ Kf8 8. h8=L g5 9. Le5 c5 10. Lf4 Lxf4 11. h4 d6 12. h5 Ld7 13. h6 La4 14. h7 Sd7 15. h8=L Tc8 16. Ld4 Tc6 17. Le3 Da8 18. d4 Sc8 19. Kd2 Lxe3+
play all play one stop play next play all
Henrik Juel: Euclide 1.01 found no solution
diagram error? (2021-10-27)
A.Buchanan: Hi Henrik thanks for this. I see it's a forsyth error in the draft report by Michel: an extraneous "r" at the beginning. I will correct here in PDB right now. Note that this problem is not marked C+. (2021-10-27)
Henrik Juel: Thanks, Andrew
I just received the revised judgement; the author submitted the problem with C+, but the judge found this hard to believe and made it HC+ by testing the four possible positions before 19.Lf4xYe3+ with Natch 3.3 (2021-10-28)
more ...
comment
Keywords: Unique Proof Game, Champagne-TT (2021)
Genre: Retro
Computer test: HC+ natch 3.3 C+ Stelvio 1.11 in 171:15:31 Stunden. (hhh:mm:ss) Keine Lösung: BP 18.0, BP 18.5. SPG ist richtig 19.0!
FEN: q1n1rk2/pp1n1p2/2rp4/2p3p1/b2Pp3/1P2b3/P1PKPP2/RN1Q1BNR
Input: A.Buchanan, 2021-10-25
Last update: A.Buchanan, 2023-05-08 more...
43 - P1407344
Roberto Osorio
P0384 StrateGems 67 07-09/2014
Lob
P1407344
(12+14) C+
BP in 18,0
1. g3 a5 2. Lh3 a4 3. Le6 a3 4. Sh3 axb2 5. Sa3 b1=L 6. Lb2 b5 7. Ld4 b4 8. c3 b3 9. Dc2 bxa2 10. Dg6 Le4 11. 0-0-0 a1=S 12. Tdf1 Sc2 13. Kd1 Se3+ 14. fxe3 fxg6 15. Tf7 Sf6 16. Tf1 Sh5 17. T1f6 Lf3 18. exf3 gxf6
play all play one stop play next play all
Henrik Juel: The white pawn cross capture is surprising, the black one is not (2023-01-19)
more ...
comment

Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.4 62:30:11 Stunden. (hh:mm:ss) Keine Lösung: BP 17.5 18:50:09 Stunden.
FEN: rnbqkb1r/2pppR1p/4Bpp1/7n/3B4/N1P1PPPN/3P3P/3K4
Input: Vladimir Rey, 2023-01-19
Last update: A.Buchanan, 2023-06-29 more...
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