Very nice pun. Fabel-haft position indeed.peter wrote:Hi!Had a little detour of that kind in my line at first too and deleted yesterdyay a posting about it again. 82 seems to be correct:MikeGL wrote: For the mean time I think I saw an improvement on the above solution. Moves 10 to 16 of white is not necessary because white can directly play 10.Bc2+ then followed by 11.Kc1 or 11.Kd1 Δ 12.Kc1 depending on white whites replies. 88-6 = 82 moves
[pgn]
[Event "#82"]
[Site "Talkchess"]
[Date "2017.06.27"]
[Round "?"]
[White "Fabel, Karl"]
[Black "komodo0, Sting"]
[Result "1-0"]
[SetUp "1"]
[FEN "8/1p1p2p1/5p1p/5P1P/1p1p1P2/pP1P1P2/P1k1B3/4K3 w - - 0 1"]
[PlyCount "163"]
[EventDate "2017.??.??"]
1. Bf1 Kc1 2. Bh3 Kc2 3. Ke2 Kc1 4. Bg2 Kc2 5. Bf1 Kc1 6. Ke1 Kc2 7. Be2 Kc1 8.
Bd1 Kb2 9. Kd2 Kb1 10. Bc2+ Kb2 11. Kd1 Ka1 12. Kc1 Kxa2 13. Bd1 Ka1 14. Kc2
Ka2 15. Be2 Ka1 16. Bf1 Ka2 17. Bh3 Ka1 18. Bg2 Ka2 19. Bf1 Ka1 20. Be2 Ka2 21.
Bd1 Ka1 22. Kc1 Ka2 23. Bc2 Ka1 24. Bb1 d6 25. Bc2 Ka2 26. Bd1 Ka1 27. Kc2 Ka2
28. Be2 Ka1 29. Bf1 Ka2 30. Bg2 Ka1 31. Bh3 Ka2 32. Bf1 Ka1 33. Be2 Ka2 34. Bd1
Ka1 35. Kc1 Ka2 36. Bc2 Ka1 37. Bb1 d5 38. Bc2 Ka2 39. Bd1 Ka1 40. Kc2 Ka2 41.
Be2 Ka1 42. Bf1 Ka2 43. Bh3 Ka1 44. Bg2 Ka2 45. Bf1 Ka1 46. Be2 Ka2 47. Bd1 Ka1
48. Kc1 Ka2 49. Bc2 Ka1 50. Bb1 b6 51. Bc2 Ka2 52. Bd1 Ka1 53. Kc2 Ka2 54. Be2
Ka1 55. Bf1 Ka2 56. Bh3 Ka1 57. Bg2 Ka2 58. Bf1 Ka1 59. Be2 Ka2 60. Bd1 Ka1 61.
Kc1 Ka2 62. Bc2 Ka1 63. Bb1 b5 64. Bc2 Ka2 65. Bd1 Ka1 66. Kc2 Ka2 67. Be2 Ka1
68. Bf1 Ka2 69. Bg2 Ka1 70. Bh3 Ka2 71. Bf1 Ka1 72. Be2 Ka2 73. Bd1 Ka1 74. Kc1
Ka2 75. Bc2 Ka1 76. Bb1 g5 77. hxg6 h5 78. g7 a2 79. Bc2 h4 80. g8=Q h3 81.
Qxd5 h2 82. Qxd4# 1-0
[/pgn]
Best engine for (backward) solving this might be komodo with switched off nullmove.
According to YACPD it's a study from Karl Fabel (1951, #82).
Database gives only first move as solution, which is not so difficult to find anyhow.
Yet a great one from there onward, in German I'd say Fabel-haft
Just completed the Mate in 50 at ChestUCI.epd position 6314.
[d]8/7p/7p/7p/K4Q1p/p1p5/pbpr4/qrk5 w - - 0 1
+M50
[pgn]
[Event "Computer chess game"]
[Site "Talkchess"]
[Date "2017.06.27"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "1-0"]
[BlackElo "2400"]
[Time "16:59:52"]
[WhiteElo "2400"]
[TimeControl "0+2"]
[SetUp "1"]
[FEN "8/7p/7p/7p/K4Q1p/p1p5/pbpr4/qrk5 w - - 0 1"]
[Termination "normal"]
[PlyCount "99"]
[WhiteType "human"]
[BlackType "human"]
1. Kb4 h3 2. Kb3 h4 3. Qf1+ Rd1 4. Qf2 Rd2 5. Qf4 h5 6. Qf1+ Rd1 7. Qf2 Rd2
8. Qf4 h6 9. Qf1+ Rd1 10. Qf2 Rd2 11. Qf4 h2 12. Qf1+ Rd1 13. Qg2 Rd2 14.
Qh1+ Rd1 15. Qxh2 Rd2 16. Qf4 h3 17. Qf1+ Rd1 18. Qf2 Rd2 19. Qf4 h4 20.
Qf1+ Rd1 21. Qf2 Rd2 22. Qf4 h5 23. Qf1+ Rd1 24. Qf2 Rd2 25. Qf4 h2 26.
Qf1+ Rd1 27. Qg2 Rd2 28. Qh1+ Rd1 29. Qxh2 Rd2 30. Qf4 h3 31. Qf1+ Rd1 32.
Qf2 Rd2 33. Qf4 h4 34. Qf1+ Rd1 35. Qf2 Rd2 36. Qf4 h2 37. Qf1+ Rd1 38. Qg2
Rd2 39. Qh1+ Rd1 40. Qxh2 Rd2 41. Qf4 h3 42. Qf1+ Rd1 43. Qf2 Rd2 44. Qf4
h2 45. Qf1+ Rd1 46. Qg2 Rd2 47. Qh1+ Rd1 48. Qxh2 Rd2 49. Qf4 Kd1 50. Qf1#
1-0
[/pgn]
Not sure if there are some flaws on this Mate in 50 line I have manually tried, or maybe this is already optimum. Engines seems clueless due to a lot of zugzwangs.
Maybe the correct title for this puzzle is "The h2 sniper would also deliver checkmate".
All foot soldiers trying to invade h2 would be owned by the sniper.