MikeGL wrote: ↑Sat Jun 20, 2020 3:03 pm
Here's the possible Mate in 63 and also M62 solutions (using SF and manual analysis)
There's a glitch in M62 puzzle. My interface keeps on reporting 50-move-rule draw, because there's no capture.
Maybe that, or there is a more efficient mate reaching M62 with captures somewhere.
[pgn]
[Event "+M63 Puzzle"]
[Site "Talkchess"]
[Date "2020.06.20"]
[Round "?"]
[White "SF"]
[Black "SF"]
[Result "1-0"]
[BlackElo "2400"]
[Time "20:38:56"]
[TimeControl "480+5"]
[SetUp "1"]
[FEN "4Q1R1/1pRp1rbp/1Pn2k1q/2P2prb/5Pp1/3p1pP1/3P1P1K/6B1 w - - 0 1"]
[Termination "normal"]
[PlyCount "125"]
[WhiteType "human"]
[BlackType "human"]
1. Rxc6+ dxc6 2. Qe5+ Kg6 3. Qe6+ Rf6 4. Qe8+ Rf7 5. Kh1 Kf6 6. Qe5+ Kg6 7.
Qe6+ Rf6 8. Qe8+ Rf7 9. Bh2 Kf6 10. Qe5+ Kg6 11. Qe6+ Rf6 12. Qe8+ Rf7 13.
Kg1 Kf6 14. Qe5+ Kg6 15. Qe6+ Rf6 16. Qe8+ Rf7 17. Kf1 Kf6 18. Qe5+ Kg6 19.
Qe6+ Rf6 20. Qe8+ Rf7 21. Ke1 Kf6 22. Qe5+ Kg6 23. Qe6+ Rf6 24. Qe8+ Rf7
25. Kd1 Kf6 26. Qe5+ Kg6 27. Qe6+ Rf6 28. Qe8+ Rf7 29. Kc1 Kf6 30. Qe5+ Kg6
31. Qe6+ Rf6 32. Qe8+ Rf7 33. Kb1 Kf6 34. Qe5+ Kg6 35. Qe6+ Rf6 36. Qe8+
Rf7 37. Ka2 Kf6 38. Qe5+ Kg6 39. Qe6+ Rf6 40. Qe8+ Rf7 41. Kb3 Kf6 42. Qe5+
Kg6 43. Qe6+ Rf6 44. Qe8+ Rf7 45. Kc4 Kf6 46. Qe5+ Kg6 47. Qe6+ Rf6 48.
Qe8+ Rf7 49. Kxd3 Kf6 50. Qe5+ Kg6 51. Qe6+ Rf6 52. Qe8+ Rf7 53. Kc4 Kf6
54. Qe5+ Kg6 55. Qe6+ Rf6 56. Qe8+ Rf7 57. d4 Kf6 58. Qe5+ Kg6 59. Qe6+ Rf6
60. Qe8+ Rf7 61. d5 cxd5+ 62. Kxd5 Kf6 63. Qe6# 1-0
[/pgn]
[pgn]
[Event "+M62 Puzzle"]
[Site "Talkchess"]
[Date "2020.06.20"]
[Round "?"]
[White "SF"]
[Black "SF"]
[Result "1-0"]
[BlackElo "2400"]
[Time "20:49:13"]
[WhiteElo "2400"]
[TimeControl "480+5"]
[SetUp "1"]
[FEN "8/1ppr4/br6/1pkp4/2p1Qp2/KPp2p2/B1PP1P2/8 w - - 0 1"]
[Termination "normal"]
[PlyCount "123"]
[WhiteType "human"]
[BlackType "human"]
1. d4+ Kd6 2. Qe5+ Kc6 3. Qe6+ Rd6 4. Qe8+ Rd7 5. b4 Kd6 6. Qe5+ Kc6 7.
Qe6+ Rd6 8. Qe8+ Rd7 9. Bb1 Kd6 10. Qe5+ Kc6 11. Qe6+ Rd6 12. Qe8+ Rd7 13.
Ka2 Kd6 14. Qe5+ Kc6 15. Qe6+ Rd6 16. Qe8+ Rd7 17. Ka1 Kd6 18. Qe5+ Kc6 19.
Qe6+ Rd6 20. Qe8+ Rd7 21. Ba2 Kd6 22. Qe5+ Kc6 23. Qe6+ Rd6 24. Qe8+ Rd7
25. Kb1 Kd6 26. Qe5+ Kc6 27. Qe6+ Rd6 28. Qe8+ Rd7 29. Kc1 Kd6 30. Qe5+ Kc6
31. Qe6+ Rd6 32. Qe8+ Rd7 33. Kd1 Kd6 34. Qe5+ Kc6 35. Qe6+ Rd6 36. Qe8+
Rd7 37. Ke1 Kd6 38. Qe5+ Kc6 39. Qe6+ Rd6 40. Qe8+ Rd7 41. Kf1 Kd6 42. Qe5+
Kc6 43. Qe6+ Rd6 44. Qe8+ Rd7 45. Kg1 Kd6 46. Qe5+ Kc6 47. Qe6+ Rd6 48.
Qe8+ Rd7 49. Kh2 Kd6 50. Qe5+ Kc6 51. Qe6+ Rd6 52. Qe8+ Rd7 53. Kh3 Kd6 54.
Qe5+ Kc6 55. Qe6+ {50 moves rule} Rd6 {50 moves rule} 56. Qe8+ {50 moves
rule} Rd7 {50 moves rule} 57. Kg4 {50 moves rule} Kd6 {50 moves rule} 58.
Qe5+ {50 moves rule} Kc6 {50 moves rule} 59. Qe6+ {50 moves rule} Rd6 {50
moves rule} 60. Qe8+ {50 moves rule} Rd7 {50 moves rule} 61. Kf5 {50 moves
rule} Kd6 {50 moves rule} 62. Qe6# 1-0
[/pgn]