When I do a long time analysis, I get as a result:

This puzzle is'nt intended as a study in a strict sense. Rather, the question is: Do the engines find the fastest and most beautiful solution?
Moderator: Ras
Hi, I have made some modifications to your position:
FEN: 7k/p1pp2pp/1p1p4/8/2P2B1R/q1PP4/8/3R2K1 w - - 0 1
peter wrote: ↑Wed Feb 16, 2022 1:37 pm [pgn][Event "?"]
[Site "?"]
[Date "2022.02.16"]
[Round "?"]
[White "Hobacle's , FinalVersionOf"]
[Black "Walter's, Position"]
[Result "1-0"]
[Annotator "SF"]
[SetUp "1"]
[FEN "7k/p1pp2pp/1p1p4/8/2P2B1R/q1PP4/8/3R2K1 w - - 0 1"]
[PlyCount "123"]
1. Rf1 h6 (1... h5 2. Rxh5+ Kg8 3. Rc1) (1... Qc5+ 2. d4 Qxc4 3. Bh6) 2. Bxh6
gxh6 3. Rxh6+ Kg7 4. Rh2 Qxc3 5. Rg2+ Kh7 6. Rf7+ Kh8 7. Rf3 Qa1+ 8. Kh2 Qe5+
9. Rfg3 Qf4 10. Re2 Qf1 11. Re4 Qf2+ 12. Rg2 Qf6 13. Kg3 Qg6+ 14. Kf3 Qf7+ 15.
Ke2 Qh5+ 16. Reg4 Qe5+ 17. Kf2 Qf6+ 18. Kg1 Qa1+ 19. Kh2 Qf6 20. Rg5 Qf3 21.
R2g3 Qe2+ 22. Kh3 Kh7 23. Kh4 Kh6 24. Rg6+ Kh7 25. Rg7+ Kh8 26. R7g5 Qh2+ 27.
Rh3 Qf4+ 28. Kh5 Kh7 29. Rhg3 Qf6 30. Kg4 Qe6+ 31. Kf3 Kh6 32. Rg8 Qf6+ 33. Kg2
Qb2+ 34. Kh1 Qb1+ 35. Rg1 Qxd3 36. Rh8+ Qh7 37. Rxh7+ Kxh7 38. Kh2 a6 39. Kh3
c6 40. Rd1 Kg7 41. Rxd6 Kf7 42. Rxd7+ Ke8 43. Rd6 b5 44. cxb5 cxb5 45. Rxa6 b4
46. Kg3 Kd7 47. Rb6 b3 48. Kf4 Kc7 49. Rxb3 Kd6 50. Rb5 Ke6 51. Re5+ Kd6 52.
Kf5 Kd7 53. Rd5+ Kc7 54. Ke5 Kc6 55. Ke6 Kc7 56. Rc5+ Kb7 57. Kd7 Kb6 58. Re5
Kb7 59. Re6 Kb8 60. Kc6 Ka8 61. Kb6 Kb8 62. Re8# 1-0
[/pgn]
Some output after some Forward- Backward:
7k/p1pp2pp/1p1p4/8/2P2B1R/q1PP4/8/3R2K1 w - - 0 1
Analysis by Stockfish 11 64 POPCNT30:
Code: Select all
1. +- (3.48): 1.Rf1 h5 2.Rxh5+ Kg8 3.Rc1 a6 4.Rg5 b5 5.cxb5 axb5 6.Rxb5 Qa6 7.Rd5 Qa7+ 8.d4 Qa8 9.Rg5 Qf3 10.Bd2 Qd3 11.Rg2 c5 12.dxc5 dxc5 13.Rf1 Qa6 14.Rg3 d5 15.Be3 Qb6 16.Bf2 Qb5 17.Re1 Kf7 18.Re5 Qb1+ 19.Kg2 Qa2 20.Rd3 d4 21.Rxc5 dxc3 22.Rf3+ Kg6 23.Rcxc3 Qe6 24.Rg3+ Kh7 25.Kg1 Qd5 26.Rh3+ Kg8 27.Rcd3 Qe6 28.Rd8+ Kf7 29.Rf3+ Kg6 30.Rg3+ Kh7 31.Be3 Qe4 32.Bd2 Qe5 33.Rh3+ Kg6 2. = (0.10): 1.Be3 h6 2.Kh1 Kh7 3.Rg1 Qa5 4.c5 Qa2 5.Rg2 Qd5 6.cxb6 axb6 7.Kg1 Qf5 8.Kh2 Qd5 9.d4 Qf3 10.Rh3 Qd5 11.Bf4 Qf5 12.Rh4 Qf7 13.Kg1 Qf6 14.Rhg4 Qe7 15.Kf2 Qf7 16.Kg3 Qe7 17.Kh3 Kh8 18.Rxg7 Qxg7 19.Rxg7 Kxg7 20.Kg4 Kf6 21.Bxh6 Ke6 22.Kf3 Kd5 23.Ke3 Kc4 24.Kd2 c5 25.Bg7 b5 26.Ke3 cxd4+ 27.cxd4 b4 28.Kd2 b3 29.Bh8 d5 30.Bf6
Okay, here is my alternate version, maybe easier, but more beautiful.
Thank you, dear Hobacle!Hobacle wrote: ↑Mon Feb 21, 2022 3:58 pmOkay, here is my alternate version, maybe easier, but more beautiful.
https://lichess.org/study/gheIVqCR/hw3cGdCs
Distance to mate with backward analysis. 3 best moves after 1.Bxh6!
Code: Select all
FEN: 7k/p1p3p1/1p1p3B/8/2P5/q1PP4/7R/5RK1 b - - 0 1
McCain-v2_x64_modern-LMonge:
...
57/59 11:10 46.261.772k 68.987k +M29 1. ... Qb3 2.Bxg7+ Kxg7 3.Rg2+ Kh6 4.Kh1 Qa4 5.d4 Qe8 6.Rf3 Qh5+ 7.Rh2 Qxh2+ 8.Kxh2 Kg7 9.Kg2 a5 10.Rf1 Kg6 11.Rf8 Kg7 12.Rc8 Kf7 13.Rxc7+ Ke8 14.c5 bxc5 15.dxc5 dxc5 16.Rxc5 a4 17.Rd5 a3 18.c4 a2 19.Rd1 Ke7 20.c5 a1Q 21.Rxa1 Kd7 22.Rc1 Kc6 23.Kf2 Kd5 24.c6 Kd4 25.c7 Ke5 26.c8Q Kf6 27.Qa6+ Kg5 28.Rc5+ Kg4 29.Qc4+ Kh3 30.Rh5+
57/63 11:10 46.261.772k 68.987k +M31 1. ... Qa4 2.Bxg7+ Kxg7 3.Rg2+ Kh6 4.Kh2 Qe8 5.Rf3 Qe5+ 6.Rfg3 a6 7.Kh1 Qe1+ 8.Rg1 Qe6 9.R3g2 Kh7 10.Rh2+ Qh6 11.Rxh6+ Kxh6 12.d4 a5 13.Kh2 Kh7 14.c5 bxc5 15.dxc5 dxc5 16.c4 a4 17.Rg3 Kh6 18.Kg2 Kh5 19.Kh3 c6 20.Kg2 Kh6 21.Kf3 a3 22.Kg4 a2 23.Ra3 Kg7 24.Rxa2 Kf7 25.Kf5 Ke7 26.Rd2 Kf7 27.Rd7+ Ke8 28.Ke6 Kf8 29.Ra7 Kg8 30.Kf6 Kh8 31.Kg6 Kg8 32.Ra8+
57/101 11:10 46.261.772k 68.987k +M63 1. ... gxh6 2.Rxh6+ Kg7 3.Rh2 Qxc3 4.Rg2+ Kh7 5.Rf7+ Kh8 6.Rf3 Qe1+ 7.Kh2 Qe5+ 8.Rfg3 Qf4 9.Re2 Qf1 10.Re4 Qf2+ 11.Rg2 Qf6 12.Kg3 Qg5+ 13.Kf3 Qf5+ 14.Ke2 Qh5+ 15.Reg4 Qe5+ 16.Kf2 Qb2+ 17.Kf3 Qf6+ 18.Kg3 Qe5+ 19.Kh3 Qf5 20.Kh2 Qf6 21.Rg5 Qf3 22.R2g4 Qf2+ 23.Kh3 Qe3+ 24.Rg3 Qe2 25.Kh4 Qh2+ 26.Rh3 Qf4+ 27.Kh5 Kh7 28.Rhg3 Qf7+ 29.Kg4 Qe6+ 30.Kf3 Qf6+ 31.Kg2 Qb2+ 32.Kh1 Kh6 33.Rg8 Qb1+ 34.Rg1 Qxd3 35.Rh8+ Qh7 36.Rxh7+ Kxh7 37.Kh2 a6 38.Rg4 b5 39.cxb5 axb5 40.Kg3 c5 41.Rg5 b4 42.Rd5 b3 43.Rxd6 Kg8 44.Rb6 Kf8 45.Kf4 c4 46.Ke4 Kg8 47.Rb7 c3 48.Rxb3 c2 49.Rg3+ Kf7 50.Rc3 c1Q 51.Rxc1 Kf6
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58/59 17:18 66.814.438k 64.364k +M29 1. ... Qb3 2.Bxg7+ Kxg7 3.Rg2+ Kh6 4.Kh1 Qa4 5.d4 Qe8 6.Rf3 Qh5+ 7.Rh2 Qxh2+ 8.Kxh2 Kg7 9.Kg2 a5 10.Rf2 Kg6 11.Rf8 Kg7 12.Rc8 Kf7 13.Rxc7+ Ke8 14.c5 dxc5 15.dxc5 bxc5 16.Rxc5 a4 17.Rd5 a3 18.c4 a2 19.Rd1 Ke7 20.c5 a1B 21.Rxa1 Kd7 22.Kf3 Kc6 23.Rc1 Kb7 24.c6+ Kc7 25.Rc2 Kd6 26.c7 Kd5 27.c8Q Kd6 28.Rc6+ Ke5 29.Qe6+ Kd4 30.Qe4+
58/63 17:18 66.814.438k 64.364k +M31 1. ... Qa4 2.Bxg7+ Kxg7 3.Rg2+ Kh6 4.Kh2 Qe8 5.Rf3 Qe5+ 6.Rfg3 a6 7.Kh1 Qe1+ 8.Rg1 Qe6 9.R3g2 Kh7 10.Rh2+ Qh6 11.Rxh6+ Kxh6 12.d4 a5 13.Kh2 Kh7 14.c5 bxc5 15.dxc5 dxc5 16.c4 a4 17.Rg3 Kh6 18.Kg2 Kh5 19.Kh3 c6 20.Kg2 Kh6 21.Kf3 a3 22.Kg4 a2 23.Ra3 Kg7 24.Rxa2 Kf7 25.Kf5 Ke7 26.Rd2 Kf7 27.Rd7+ Ke8 28.Ke6 Kf8 29.Ra7 Kg8 30.Kf6 Kh8 31.Kg6 Kg8 32.Ra8+
58/103 17:18 66.814.438k 64.364k +169,10 1. ... gxh6 2.Rxh6+ Kg7 3.Rh2 Qxc3 4.Rg2+ Kh7 5.Rf7+ Kh8 6.Rf3 Qe1+ 7.Kh2 Qe5+ 8.Rfg3 Qf4 9.Re2 Qf1 10.Re4 Qf2+ 11.Rg2 Qf6 12.Kg3 Qg5+ 13.Kf3 Qf5+ 14.Ke2 Qh5+ 15.Reg4 Qe5+ 16.Kf2 Qb2+ 17.Kg3 Qe5+ 18.Kh3 Qf5 19.Kh2 Qf6 20.Rg5 Qf3 21.R2g4 Qf2+ 22.Kh3 Qe3+ 23.Rg3 Qe2 24.Kh4 Qh2+ 25.Rh3 Qf4+ 26.Kh5 Kh7 27.Rhg3 Qf7+ 28.Kg4 Qe6+ 29.Kf3 Qf6+ 30.Kg2 Qb2+ 31.Kh1 Kh6 32.Rg8 Qb1+ 33.Rg1 Qxd3 34.Rh8+ Qh7 35.Rxh7+ Kxh7 36.Kh2 a6 37.Kg3 Kg7 38.Kf4+ Kf6
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58/59 24:23 88.893.305k 60.726k +M29 1. ... Qb3 2.Bxg7+ Kxg7 3.Rg2+ Kh6 4.Kh1 Qa4 5.d4 Qe8 6.Rf3 Qh5+ 7.Rh2 Qxh2+ 8.Kxh2 Kg7 9.Kg2 a5 10.Rf2 Kg6 11.Rf8 Kg7 12.Rc8 Kf7 13.Rxc7+ Ke8 14.c5 dxc5 15.dxc5 bxc5 16.Rxc5 a4 17.Rd5 a3 18.c4 a2 19.Rd1 Ke7 20.c5 a1B 21.Rxa1 Kd7 22.Kf3 Kc6 23.Rc1 Kb7 24.c6+ Kc7 25.Rc2 Kd6 26.c7 Kd5 27.c8Q Kd6 28.Rc6+ Ke5 29.Qe6+ Kd4 30.Qe4+
59/71 24:23 88.893.305k 60.726k +M30 1. ... Qa4 2.Bxg7+ Kxg7 3.Rg2+ Kh6 4.Kh2 Qe8 5.Rf3 Qe5+ 6.Rfg3 Kh7 7.Kh1 Qe1+ 8.Rg1 Qe6 9.R3g2 Qh6+ 10.Rh2 a6 11.Rxh6+ Kxh6 12.d4 a5 13.Kh2 Kh5 14.d5 Kh4 15.Rg2 a4 16.Rg1 a3 17.Rg2 a2 18.Rxa2 Kg4 19.Rf2 Kh4 20.Rf4+ Kh5 21.Kg3 b5 22.cxb5 Kg5 23.Rf1 Kh5 24.Kf4 Kg6 25.Kg4 Kh7 26.Kh5 Kg7 27.Kg5 c5 28.bxc6 Kh7 29.c7 Kg8 30.Kg6 Kh8 31.c8Q+
59/113 24:23 88.893.305k 60.726k +M62 1. ... gxh6 2.Rxh6+ Kg7 3.Rh2 Qxc3 4.Rg2+ Kh7 5.Rf7+ Kh8 6.Rf3 Qe1+ 7.Kh2 Qe5+ 8.Rfg3 Qf4 9.Re2 Qf1 10.Re4 Qf2+ 11.Rg2 Qf6 12.Kg3 Qg5+ 13.Kf3 Qf5+ 14.Ke2 Qh5+ 15.Reg4 Qe5+ 16.Kf2 Qb2+ 17.Kg3 Qe5+ 18.Kh3 Qf5 19.Kh2 Qf6 20.Rg5 Qf3 21.R2g4 Qf2+ 22.Kh3 Qe3+ 23.Rg3 Qe2 24.Kh4 Qh2+ 25.Rh3 Qf4+ 26.Kh5 Kh7 27.Rhg3 Qf7+ 28.Kg4 Qe6+ 29.Kf3 Qf6+ 30.Kg2 Qb2+ 31.Kh1 Kh6 32.Rg6+ Kh5 33.R3g5+ Kh4 34.Rg1 Qh8 35.Kg2 Kh5 36.Rg3 Qb2+ 37.Kh1 Kh4 38.Rg7 Qe2 39.Rh7+ Qh5 40.Rxh5+ Kxh5 41.d4 a5 42.Rg3 c6 43.Kg2 a4 44.Kf3 d5 45.cxd5 cxd5 46.Kf4 b5 47.Rg5+ Kh6 48.Rxd5 b4 49.Ra5 Kg6 50.Rxa4 b3 51.Ra5 Kf7 52.Ke5 Kg6 53.Rb5 Kg7 54.d5 Kh8 55.Rb8+ Kh7