Die Schwalbe

4 problem(s) found in 8942 milliseconds (displaying 4 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT K='Funktionswechsel' AND K='Lois-Thema'] [download as LaTeX]

1 - 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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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...
2 - 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
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A.Buchanan: Not just hidden castling, but the full Lois theme with sKh8 & sTe8 (2022-02-08)
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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...
3 - P1338394
Göran Wicklund
J.Lois-70 JT 2016-2017
2nd Honorable Mention
P1338394
(12+14) cooked
PG in 33.0
1. Sf3 a5 2. Sd4 a4 3. Sb3 axb3 4. a4 Ta5 5. Ta2 bxa2 6. h4 a1=S 7. h5 Sb3 8. h6 Sd4 9. hxg7 Sf5 10. gxh8=L Sh4 11. Le5 f5 12. Lh2 e5 13. g3 La3 14. Lg2 Se7 15. Lc6 dxc6 16. 0-0 Sd7 17. Kh1 Sf8 18. Lg1 Dd5+ 19. Kh2 Kd7 20. Kh3 Dh1+ 21. Lh2 e4 22. Tg1 Te5 23. Df1 c5 24. Dg2 Kc6 25. Df3 Kb6 26. Tg2 Dd1 27. Tg1 Ka5 28. Te1 b6 29. Lg1 La6 30. Kh2 Ld3 31. Kh1 c4 32. Lh2 c5 33. Kg1 Dxe1#
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Judge J. Lois: This problem presents the theme Lois between the wK1-WBh2(2) with a switchback of both pieces.
In addition, change of place between WKe1-wRh1 in move 31.
Cook: 1. a4 b5 2. Ta3 b4 3. h4 bxa3 4. h5 a2 5. h6 a1=S 6. hxg7 Sb3 7. gxh8=L Sd4 8. Le5 Sf5 9. Lh2 e5 10. g3 La3 11. Lg2 La6 12. Lc6 dxc6 13. Kf1 c5 14. Kg2 Kd7 15. Sh3 Kc6 16. Sf4 Kb6 17. Sd5+ Ka5 18. Sb6 axb6 19. Kh3 Dd5 20. Tg1 Dh1 21. Df1 e4 22. Dg2 Sd7 23. Df3 Te8 24. Tg2 Dd1 25. Tg1 Te5 26. Te1 Sf8 27. Lg1 Sge7 28. Lh2 Sh4 29. Lg1 f5
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Keywords: Unique Proof Game, Non-standard material, Lois Theme, Promotion (x2 sL), Castling
Genre: Retro
FEN: 5n2/4n2p/1p6/k1p1rp2/P1p1p2n/b2b1QP1/1PPPPP1B/1NB1q1K1
Input: A.Buchanan, 2017-08-30
Last update: James Malcom, 2021-06-28 more...
4 - P1339432
Michael Barth
Silvio Baier

Die Schwalbe 2014
P1339432
(15+15) C+
PG in 19.0
1. b4 b5 2. Lb2 Lb7 3. Ld4 Ld5 4. Lb6 axb6 5. Sc3 Ta3 6. Se4 Tb3 7. Sg5 Tb1 8. Sxh7 Tc1 9. Tb1 Sc6 10. Tb3 Ta1 11. Db1 Da8 12. Kd1 Kd8 13. Kc1 Kc8 14. Kb2 Kb7 15. Dd1 Ka6 16. Ka3 Tc1 17. Tb1 Le6 18. Ta1 Tb1 19. Sg5 Tb3+
play all play one stop play next play all
Reto: Mit Stelvio 1.4 dauert das nur noch 7min (2023-06-21)
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Keywords: Unique Proof Game, Lois Theme (Tt), Switchback (St), Interchange (Tt x2)
Genre: Retro
Computer test: Stelvio 1.0 (5,5d)
FEN: q4bnr/2ppppp1/kpn1b3/1p4N1/1P6/Kr6/P1PPPPPP/R2Q1BNR
Reprints: H3 The Problemist 26-3, p. 119, 05/2017
Input: A.Buchanan, 2017-09-15
Last update: Silvio Baier, 2023-03-05 more...
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The problems of this query have been registered by the following contributors:

Gerd Wilts (2)
A.Buchanan (2)