Die Schwalbe

23 problem(s) found in 3311 milliseconds (displaying 23 problem(s)). [COMMENTDATE>=20220810 AND G='Retro' AND NOT S='Gyuala Breyer - The Chess Revolutionary [ed. Jimmy Adams]' 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
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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...
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
play all play one stop play next play all
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 - 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...
5 - 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#
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Henrik Juel: Sb1 is actually [Sg1], and Sg1 is [Pa2] promoted on c8.
Testing with Euclide ran out of time. (2011-02-27)
paul: The first 19 moves checked by Euclide in half a day. (2020-12-02)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 01:04:22 Stunde. (hh:mm:ss)
Keine Lösung: BP 19.0, BP 19.5. (2023-03-02)
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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...
6 - 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
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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)
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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...
7 - 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
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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...
8 - 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)
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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...
9 - 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...
10 - 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...
11 - 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
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Mario Richter: I do not know the intended solution, but the following play does the job:
1.h2-h4 g7-g5 2.h4xg5 c7-c5 3.Rh1-h6 c5-c4 4.Rh6-b6 a7xb6 5.Nb1-c3 Ra8-a3 6.Nc3-b5 Ra3-e3 7.f2xe3 c4-c3 8.d2xc3 h7-h5 9.Qd1-d5 Rh8-h6 10.Bc1-d2 Rh6-f6 11.0-0-0 Rf6xf1 12.Bd2-e1 Rf1-f4 13.Qd5-f3 f7-f5 14.Rd1-d6 Rf4-d4 15.Rd6-f6 e7xf6 16.Nb5-a3 Qd8-e7 17.Na3-b1 Qe7-a3 18.Be1-d2 Qa3-a8 19.a2-a4 Bf8-a3 20.Kc1-d1 Ke8-e7 21.Kd1-e1 Ke7-d6 22.Bd2-c1
I think the theme is the so-called Lois-theme, here executed by wK and wBc1 (2014-10-02)
Henrik Juel: Thanks, Mario.
Besides the interchange by two men doubled (Lois), there is a nice roundtrip by Sb1 and an unlikely castling; very good (2014-10-02)
Henrik Juel: Natch 3.1 did little in half an hour
Stopped at pos. 2 (2018-12-27)
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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...
12 - 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...
13 - 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)
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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...
14 - 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)
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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...
15 - 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...
16 - 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...
17 - 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...
18 - 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...
19 - 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...
20 - 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...
21 - 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...
22 - 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...
23 - 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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The problems of this query have been registered by the following contributors:

Gerd Wilts (11)
Frank Müller (1)
A.Buchanan (4)
fs/hg (2)
Gunter Jordan (4)
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