White to move and force mate in 81

[Chessqueen]

Try to solve this puzzle[/size]

K7/p3p1p1/1p2p1p1/rp4B1/brpn4/Rnk5/8/4N1N1 w

Actually Gustav CAN solve this mate, see here:

https://www.chessprogramming.org/Gustav#Longest_Problem

The longest for Gustav solvable problem so far has 163 moves, not in 163 moves, I believe that the shortest amount that this puzzle can be solved is 167 moves, which is correct

[Hobacle]

I have a small question...
[fen]8/1p4p1/5p1p/5P1p/1p1p4/pPkP1P2/P3BK1P/8 w - - 0 1[/fen]
Is White winning...

The small solution:
[pgn][Date "2023.07.05"]
[Result "1-0"]
[FEN "8/1p4p1/5p1p/5P1p/1p1p4/pPkP1P2/P3BK1P/8 w - - 0 1"]
[SetUp "1"]

1. Ke1 Kc2 2. Bf1 Kc1 3. Ke2 Kc2 4. Bh3 Kc1 5. Bg2 Kc2 6. Bf1 Kc1 7. Ke1 Kc2 8.
Be2 Kc3 9. Kd1 Kb2 10. Kd2 Kb1 11. Bd1 Kb2 12. Bc2 Ka1 13. Kc1 Kxa2 14. Bd1 Ka1
15. Be2 Ka2 16. Kc2 Ka1 17. Bf1 Ka2 18. Bh3 Ka1 19. Bg2 Ka2 20. Bf1 Ka1 21. Be2
Ka2 22. Bd1 Ka1 23. Kc1 Ka2 24. Bc2 Ka1 25. Bb1 h4 26. Bc2 Ka2 27. Bd1 Ka1 28.
Be2 Ka2 29. Kc2 Ka1 30. Bf1 Ka2 31. Bh3 Ka1 32. Bg2 Ka2 33. Bf1 Ka1 34. Be2 Ka2
35. Bd1 Ka1 36. Kc1 Ka2 37. Bc2 Ka1 38. Bb1 h5 39. Bc2 Ka2 40. Bd1 Ka1 41. Be2
Ka2 42. Kc2 Ka1 43. Bf1 Ka2 44. Bh3 Ka1 45. Bg2 Ka2 46. Bf1 Ka1 47. Be2 Ka2 48.
Bd1 Ka1 49. Kc1 Ka2 50. Bc2 Ka1 51. Bb1 b6 52. Bc2 Ka2 53. Bd1 Ka1 54. Be2 Ka2
55. Kc2 Ka1 56. Bf1 Ka2 57. Bh3 Ka1 58. Bg2 Ka2 59. Bf1 Ka1 60. Be2 Ka2 61. Bd1
Ka1 62. Kc1 Ka2 63. Bc2 Ka1 64. Bb1 h3 65. Bc2 Ka2 66. Bd1 Ka1 67. Be2 Ka2 68.
Kc2 Ka1 69. Bf1 Ka2 70. Bxh3 Ka1 71. Bg4 h4 72. Bh3 Ka2 73. Bf1 Ka1 74. Be2 Ka2
75. Bd1 Ka1 76. Kc1 Ka2 77. Bc2 Ka1 78. Bb1 b5 79. Bc2 Ka2 80. Bd1 Ka1 81. Be2
Ka2 82. Kc2 Ka1 83. Bf1 Ka2 84. Bh3 Ka1 85. Bg4 Ka2 86. Bh5 Ka1 87. Be8 Ka2 88.
Bxb5 Ka1 89. Be8 Ka2 90. Bh5 Ka1 91. Bg4 Ka2 92. Bh3 Ka1 93. Bg2 Ka2 94. Bf1
Ka1 95. Be2 Ka2 96. Bd1 Ka1 97. Kc1 Ka2 98. Bc2 Ka1 99. Bb1 $18 1-0
[/pgn]
Some moves are very hard, such as 2.Bf1!!.

If you want mate problems, here's a mate in 88:
[fen]8/1p4pp/3p4/3P1P1p/1p1PB1pP/pP1P4/P3K2P/1k6 w - - 0 1[/fen]


It can still be extended.

[Chessqueen]

Here is a list from where i find most of my puzzles https://pdb.dieschwalbe.de/search.jsp?e ... 0Titusz%27

[peter]

I have a small question...
[fen]8/1p4p1/5p1p/5P1p/1p1p4/pPkP1P2/P3BK1P/8 w - - 0 1[/fen]
Is White winning...

The small solution:
[pgn][Date "2023.07.05"]
[Result "1-0"]
[FEN "8/1p4p1/5p1p/5P1p/1p1p4/pPkP1P2/P3BK1P/8 w - - 0 1"]
[SetUp "1"]

1. Ke1 Kc2 2. Bf1 Kc1 3. Ke2 Kc2 4. Bh3 Kc1 5. Bg2 Kc2 6. Bf1 Kc1 7. Ke1 Kc2 8.
Be2 Kc3 9. Kd1 Kb2 10. Kd2 Kb1 11. Bd1 Kb2 12. Bc2 Ka1 13. Kc1 Kxa2 14. Bd1 Ka1
15. Be2 Ka2 16. Kc2 Ka1 17. Bf1 Ka2 18. Bh3 Ka1 19. Bg2 Ka2 20. Bf1 Ka1 21. Be2
Ka2 22. Bd1 Ka1 23. Kc1 Ka2 24. Bc2 Ka1 25. Bb1 h4 26. Bc2 Ka2 27. Bd1 Ka1 28.
Be2 Ka2 29. Kc2 Ka1 30. Bf1 Ka2 31. Bh3 Ka1 32. Bg2 Ka2 33. Bf1 Ka1 34. Be2 Ka2
35. Bd1 Ka1 36. Kc1 Ka2 37. Bc2 Ka1 38. Bb1 h5 39. Bc2 Ka2 40. Bd1 Ka1 41. Be2
Ka2 42. Kc2 Ka1 43. Bf1 Ka2 44. Bh3 Ka1 45. Bg2 Ka2 46. Bf1 Ka1 47. Be2 Ka2 48.
Bd1 Ka1 49. Kc1 Ka2 50. Bc2 Ka1 51. Bb1 b6 52. Bc2 Ka2 53. Bd1 Ka1 54. Be2 Ka2
55. Kc2 Ka1 56. Bf1 Ka2 57. Bh3 Ka1 58. Bg2 Ka2 59. Bf1 Ka1 60. Be2 Ka2 61. Bd1
Ka1 62. Kc1 Ka2 63. Bc2 Ka1 64. Bb1 h3 65. Bc2 Ka2 66. Bd1 Ka1 67. Be2 Ka2 68.
Kc2 Ka1 69. Bf1 Ka2 70. Bxh3 Ka1 71. Bg4 h4 72. Bh3 Ka2 73. Bf1 Ka1 74. Be2 Ka2
75. Bd1 Ka1 76. Kc1 Ka2 77. Bc2 Ka1 78. Bb1 b5 79. Bc2 Ka2 80. Bd1 Ka1 81. Be2
Ka2 82. Kc2 Ka1 83. Bf1 Ka2 84. Bh3 Ka1 85. Bg4 Ka2 86. Bh5 Ka1 87. Be8 Ka2 88.
Bxb5 Ka1 89. Be8 Ka2 90. Bh5 Ka1 91. Bg4 Ka2 92. Bh3 Ka1 93. Bg2 Ka2 94. Bf1
Ka1 95. Be2 Ka2 96. Bd1 Ka1 97. Kc1 Ka2 98. Bc2 Ka1 99. Bb1 $18 1-0
[/pgn]

If your first 99 moves are correct, that was about 150 to 160 all in all to mate,
[fen]8/6p1/5p2/5P2/1p1p3p/pP1P1P2/7P/kBK5 b - - 0 1[/fen]

Analysis by Stockfish 11 64 POPCNT30:

99...h3 100.Bc2 Ka2 101.Bd1 Ka1 102.Kc2 Ka2 103.Be2 Ka1 104.Bf1 Ka2 105.Bxh3 Ka1 106.Bf1 Ka2 107.h3 Ka1 108.h4 Ka2 109.h5 Ka1 110.Be2 Ka2 111.Bd1 Ka1 112.Kc1 Ka2 113.Bc2 Ka1 114.Bb1 a2 115.Bc2 g5 116.fxg6 f5 117.g7 f4 118.Kd2 Kb2 119.g8Q a1Q 120.Bd1 Qc1+ 121.Ke2 Qe3+ 122.Kf1 Qxd3+ 123.Be2 Qb1+ 124.Kg2 Qe1 125.Qc4 d3 126.Qd4+ Ka3 127.Qxd3 Qg3+ 128.Kf1 Qh3+ 129.Ke1 Qxh5 130.Qd4 Qh1+ 131.Kd2 Qh2 132.Kd1 Qg2 133.Qe5 Qg8 134.Kc1 Qxb3 135.Qa5+ Qa4 136.Qxa4+ Kxa4 137.Kb2 Ka5 138.Kb3 Kb6 139.Kxb4 Kc7 140.Kc3 Kc8 141.Kd4 Kd7 142.Ke5 Kc6 143.Kxf4 Kd5 144.Kf5 Kd4 145.Ke6 Ke3 146.Ke5 Kf2 147.f4 Kxe2 148.f5 Kf3 149.f6 Kg4 150.Ke4 Kg5 151.f7 Kf6 152.f8Q+ Ke6 153.Qd8 Kf7 154.Kf5 Kg7 155.Qc7+ Kh6 156.Qa7 Kh5 157.Qh7#
+- (#58) Depth: 103/117 00:05:01 43557MN

but I doubt those first 99, shouldn't White be able at least to cut some triangles (which are multiangles with the Bishop always) with early h4 of its own?

[Hobacle]

I have a small question...
[fen]8/1p4p1/5p1p/5P1p/1p1p4/pPkP1P2/P3BK1P/8 w - - 0 1[/fen]
Is White winning...

The small solution:
[pgn][Date "2023.07.05"]
[Result "1-0"]
[FEN "8/1p4p1/5p1p/5P1p/1p1p4/pPkP1P2/P3BK1P/8 w - - 0 1"]
[SetUp "1"]

1. Ke1 Kc2 2. Bf1 Kc1 3. Ke2 Kc2 4. Bh3 Kc1 5. Bg2 Kc2 6. Bf1 Kc1 7. Ke1 Kc2 8.
Be2 Kc3 9. Kd1 Kb2 10. Kd2 Kb1 11. Bd1 Kb2 12. Bc2 Ka1 13. Kc1 Kxa2 14. Bd1 Ka1
15. Be2 Ka2 16. Kc2 Ka1 17. Bf1 Ka2 18. Bh3 Ka1 19. Bg2 Ka2 20. Bf1 Ka1 21. Be2
Ka2 22. Bd1 Ka1 23. Kc1 Ka2 24. Bc2 Ka1 25. Bb1 h4 26. Bc2 Ka2 27. Bd1 Ka1 28.
Be2 Ka2 29. Kc2 Ka1 30. Bf1 Ka2 31. Bh3 Ka1 32. Bg2 Ka2 33. Bf1 Ka1 34. Be2 Ka2
35. Bd1 Ka1 36. Kc1 Ka2 37. Bc2 Ka1 38. Bb1 h5 39. Bc2 Ka2 40. Bd1 Ka1 41. Be2
Ka2 42. Kc2 Ka1 43. Bf1 Ka2 44. Bh3 Ka1 45. Bg2 Ka2 46. Bf1 Ka1 47. Be2 Ka2 48.
Bd1 Ka1 49. Kc1 Ka2 50. Bc2 Ka1 51. Bb1 b6 52. Bc2 Ka2 53. Bd1 Ka1 54. Be2 Ka2
55. Kc2 Ka1 56. Bf1 Ka2 57. Bh3 Ka1 58. Bg2 Ka2 59. Bf1 Ka1 60. Be2 Ka2 61. Bd1
Ka1 62. Kc1 Ka2 63. Bc2 Ka1 64. Bb1 h3 65. Bc2 Ka2 66. Bd1 Ka1 67. Be2 Ka2 68.
Kc2 Ka1 69. Bf1 Ka2 70. Bxh3 Ka1 71. Bg4 h4 72. Bh3 Ka2 73. Bf1 Ka1 74. Be2 Ka2
75. Bd1 Ka1 76. Kc1 Ka2 77. Bc2 Ka1 78. Bb1 b5 79. Bc2 Ka2 80. Bd1 Ka1 81. Be2
Ka2 82. Kc2 Ka1 83. Bf1 Ka2 84. Bh3 Ka1 85. Bg4 Ka2 86. Bh5 Ka1 87. Be8 Ka2 88.
Bxb5 Ka1 89. Be8 Ka2 90. Bh5 Ka1 91. Bg4 Ka2 92. Bh3 Ka1 93. Bg2 Ka2 94. Bf1
Ka1 95. Be2 Ka2 96. Bd1 Ka1 97. Kc1 Ka2 98. Bc2 Ka1 99. Bb1 $18 1-0
[/pgn]

I doubt those first 99, shouldn't White be able at least to cut some triangles (which are multiangles with the Bishop always) with early h4 of its own?

The key to this study is that White must capture both of black pawns on h file and cannot play f4 during the triangulation, or it will draw. If White plays h4 early, White will have to play f4 to capture all of black pawns on h file, then it draws.
But I found a shortcut indeed. 71.Bf1! would save 2 moves.

I've been extending it.

[peter]

I have a small question...
[fen]8/1p4p1/5p1p/5P1p/1p1p4/pPkP1P2/P3BK1P/8 w - - 0 1[/fen]
Is White winning...

The small solution:
[pgn][Date "2023.07.05"]
[Result "1-0"]
[FEN "8/1p4p1/5p1p/5P1p/1p1p4/pPkP1P2/P3BK1P/8 w - - 0 1"]
[SetUp "1"]

1. Ke1 Kc2 2. Bf1 Kc1 3. Ke2 Kc2 4. Bh3 Kc1 5. Bg2 Kc2 6. Bf1 Kc1 7. Ke1 Kc2 8.
Be2 Kc3 9. Kd1 Kb2 10. Kd2 Kb1 11. Bd1 Kb2 12. Bc2 Ka1 13. Kc1 Kxa2 14. Bd1 Ka1
15. Be2 Ka2 16. Kc2 Ka1 17. Bf1 Ka2 18. Bh3 Ka1 19. Bg2 Ka2 20. Bf1 Ka1 21. Be2
Ka2 22. Bd1 Ka1 23. Kc1 Ka2 24. Bc2 Ka1 25. Bb1 h4 26. Bc2 Ka2 27. Bd1 Ka1 28.
Be2 Ka2 29. Kc2 Ka1 30. Bf1 Ka2 31. Bh3 Ka1 32. Bg2 Ka2 33. Bf1 Ka1 34. Be2 Ka2
35. Bd1 Ka1 36. Kc1 Ka2 37. Bc2 Ka1 38. Bb1 h5 39. Bc2 Ka2 40. Bd1 Ka1 41. Be2
Ka2 42. Kc2 Ka1 43. Bf1 Ka2 44. Bh3 Ka1 45. Bg2 Ka2 46. Bf1 Ka1 47. Be2 Ka2 48.
Bd1 Ka1 49. Kc1 Ka2 50. Bc2 Ka1 51. Bb1 b6 52. Bc2 Ka2 53. Bd1 Ka1 54. Be2 Ka2
55. Kc2 Ka1 56. Bf1 Ka2 57. Bh3 Ka1 58. Bg2 Ka2 59. Bf1 Ka1 60. Be2 Ka2 61. Bd1
Ka1 62. Kc1 Ka2 63. Bc2 Ka1 64. Bb1 h3 65. Bc2 Ka2 66. Bd1 Ka1 67. Be2 Ka2 68.
Kc2 Ka1 69. Bf1 Ka2 70. Bxh3 Ka1 71. Bg4 h4 72. Bh3 Ka2 73. Bf1 Ka1 74. Be2 Ka2
75. Bd1 Ka1 76. Kc1 Ka2 77. Bc2 Ka1 78. Bb1 b5 79. Bc2 Ka2 80. Bd1 Ka1 81. Be2
Ka2 82. Kc2 Ka1 83. Bf1 Ka2 84. Bh3 Ka1 85. Bg4 Ka2 86. Bh5 Ka1 87. Be8 Ka2 88.
Bxb5 Ka1 89. Be8 Ka2 90. Bh5 Ka1 91. Bg4 Ka2 92. Bh3 Ka1 93. Bg2 Ka2 94. Bf1
Ka1 95. Be2 Ka2 96. Bd1 Ka1 97. Kc1 Ka2 98. Bc2 Ka1 99. Bb1 $18 1-0
[/pgn]

I doubt those first 99, shouldn't White be able at least to cut some triangles (which are multiangles with the Bishop always) with early h4 of its own?

The key to this study is that White must capture all of black pawns on h file and cannot play f4, or it will draw. If White plays h4 early, White will have to play f4 to capture all of black pawns on h file, then it draws.
But I found a shortcut indeed. 71.Bf1! would save 2 moves.

Still looking for a way to avoid the stalemate by sacrificing the Bishop just in time to give Black's again free pawn three more moves, which would be enough for the original mate at a1 again, here's one example with Black blundering at 25...a2??:

1. Ke1 Kc2 2. Bf1 Kc1 3. Ke2 Kc2 4. Bh3 Kc1 5. Bg2 Kc2 6. Bf1 Kc1 7. Ke1 Kc2 8. Be2 Kc3 9. Kd1 Kb2 10. Kd2 Kb1 11. Bd1 Kb2 12. Bc2 Ka1 13. Kc1 Kxa2 14. h4 Ka1 15. Bd1 Ka2 16. Kc2 Ka1 17. Be2 Ka2 18. Bf1 Ka1 19. Bh3 Ka2 20. Bg2 Ka1 21. Bf1 Ka2 22. Be2 Ka1 23. Bd1 Ka2 24. Kc1 Ka1 25. Bc2 a2 $4 26. Bd1 b6 27. f4 b5 28. Be2 g6 29. fxg6 f5 30. Bg4 hxg4 31. g7 g3 32. g8=Q g2 33. Qxg2 h5 34. Qb2#

That just to show the way I mean, yet I haven't found a way to manage that without Black's blunder.
Once in a while your puzzles are somewhat too complicated for me again

[Hobacle]

[pgn][Date "2023.07.05"]
[Result "1-0"]
[FEN "8/1p4p1/5p1p/5P1p/1p1p4/pPkP1P2/P3BK1P/8 w - - 0 1"]
[SetUp "1"]

1. Ke1 Kc2 2. Bf1 Kc1 3. Ke2 Kc2 4. Bh3 Kc1 5. Bg2 Kc2 6. Bf1 Kc1 7. Ke1 Kc2 8.
Be2 Kc3 9. Kd1 Kb2 10. Kd2 Kb1 11. Bd1 Kb2 12. Bc2 Ka1 13. Kc1 Kxa2 14. Bd1 Ka1
15. Be2 Ka2 16. Kc2 Ka1 17. Bf1 Ka2 18. Bh3 Ka1 19. Bg2 Ka2 20. Bf1 Ka1 21. Be2
Ka2 22. Bd1 Ka1 23. Kc1 Ka2 24. Bc2 Ka1 25. Bb1 h4 26. Bc2 Ka2 27. Bd1 Ka1 28.
Be2 Ka2 29. Kc2 Ka1 30. Bf1 Ka2 31. Bh3 Ka1 32. Bg2 Ka2 33. Bf1 Ka1 34. Be2 Ka2
35. Bd1 Ka1 36. Kc1 Ka2 37. Bc2 Ka1 38. Bb1 h5 39. Bc2 Ka2 40. Bd1 Ka1 41. Be2
Ka2 42. Kc2 Ka1 43. Bf1 Ka2 44. Bh3 Ka1 45. Bg2 Ka2 46. Bf1 Ka1 47. Be2 Ka2 48.
Bd1 Ka1 49. Kc1 Ka2 50. Bc2 Ka1 51. Bb1 b6 52. Bc2 Ka2 53. Bd1 Ka1 54. Be2 Ka2
55. Kc2 Ka1 56. Bf1 Ka2 57. Bh3 Ka1 58. Bg2 Ka2 59. Bf1 Ka1 60. Be2 Ka2 61. Bd1
Ka1 62. Kc1 Ka2 63. Bc2 Ka1 64. Bb1 h3 65. Bc2 Ka2 66. Bd1 Ka1 67. Be2 Ka2 68.
Kc2 Ka1 69. Bf1 Ka2 70. Bxh3 Ka1 71. Bg4 h4 72. Bh3 Ka2 73. Bf1 Ka1 74. Be2 Ka2
75. Bd1 Ka1 76. Kc1 Ka2 77. Bc2 Ka1 78. Bb1 b5 79. Bc2 Ka2 80. Bd1 Ka1 81. Be2
Ka2 82. Kc2 Ka1 83. Bf1 Ka2 84. Bh3 Ka1 85. Bg4 Ka2 86. Bh5 Ka1 87. Be8 Ka2 88.
Bxb5 Ka1 89. Be8 Ka2 90. Bh5 Ka1 91. Bg4 Ka2 92. Bh3 Ka1 93. Bg2 Ka2 94. Bf1
Ka1 95. Be2 Ka2 96. Bd1 Ka1 97. Kc1 Ka2 98. Bc2 Ka1 99. Bb1 $18 1-0
[/pgn]

I doubt those first 99, shouldn't White be able at least to cut some triangles (which are multiangles with the Bishop always) with early h4 of its own?

The key to this study is that White must capture all of black pawns on h file and cannot play f4, or it will draw. If White plays h4 early, White will have to play f4 to capture all of black pawns on h file, then it draws.
But I found a shortcut indeed. 71.Bf1! would save 2 moves.

Still looking for a way to avoid the stalemate by sacrificing the Bishop just in time to give Black's again free pawn three more moves, which would be enough for the original mate at a1 again, here's one example with Black blundering at 25...a2??:

1. Ke1 Kc2 2. Bf1 Kc1 3. Ke2 Kc2 4. Bh3 Kc1 5. Bg2 Kc2 6. Bf1 Kc1 7. Ke1 Kc2 8. Be2 Kc3 9. Kd1 Kb2 10. Kd2 Kb1 11. Bd1 Kb2 12. Bc2 Ka1 13. Kc1 Kxa2 14. h4 Ka1 15. Bd1 Ka2 16. Kc2 Ka1 17. Be2 Ka2 18. Bf1 Ka1 19. Bh3 Ka2 20. Bg2 Ka1 21. Bf1 Ka2 22. Be2 Ka1 23. Bd1 Ka2 24. Kc1 Ka1 25. Bc2 a2 $4 26. Bd1 b6 27. f4 b5 28. Be2 g6 29. fxg6 f5 30. Bg4 hxg4 31. g7 g3 32. g8=Q g2 33. Qxg2 h5 34. Qb2#

That just to show the way I mean, yet I haven't found a way to manage that without Black's blunder.
Once in a while your puzzles are somewhat too complicated for me again

Just play 25...b5, then White can make no progress.

[peter]

I know, Hobacle, any other move except ...a2 would be still ok for Black there too, that's why I gave 25...a5 the ??, just wanted to show the principle of the Bishop- sac I meant, but...

Still looking for a way to avoid the stalemate by sacrificing the Bishop just in time to give Black's again free pawn three more moves, which would be enough for the original mate at a1 again

... that way as shown in Black's blunder- line abovew doesn't work if White is forced to f4 too soon, which happens now and then because of Zugzwang from this side too, (BTW 3fold threatens here and there too already) and it doesn't work with pawn still on f3 neither, the Bishop then cannot get to h5 soon enough for its own sacrificing, so what, regards

[Hobacle]

Well, this one might be easy.
[pgn][Date "2023.07.06"]
[Result "1-0"]
[FEN "8/1p1p1p1p/8/6p1/1p1p2P1/pPkP1P2/P3BP2/5K2 w - - 0 1"]
[SetUp "1"]

1. Ke1 Kc2 2. Bf1 Kc1 3. Bh3 Kc2 4. Ke2 Kc1 5. Bg2 Kc2 6. Bf1 Kc1 7. Ke1 Kc2 8.
Be2 Kc1 9. Bd1 Kb2 10. Kd2 Kb1 11. Bc2+ Kb2 12. Kd1 Ka1 13. Kc1 Kxa2 14. Bd1
Ka1 15. Be2 Ka2 16. Kc2 Ka1 17. Bf1 Ka2 18. Bh3 Ka1 19. Bg2 Ka2 20. Bf1 Ka1 21.
Be2 Ka2 22. Bd1 Ka1 23. Kc1 Ka2 24. Bc2 Ka1 25. Bb1 b6 26. Bc2 Ka2 27. Bd1 Ka1
28. Be2 Ka2 29. Kc2 Ka1 30. Bf1 Ka2 31. Bh3 Ka1 32. Bg2 Ka2 33. Bf1 Ka1 34. Be2
Ka2 35. Bd1 Ka1 36. Kc1 Ka2 37. Bc2 Ka1 38. Bb1 d6 39. Bc2 Ka2 40. Bd1 Ka1 41.
Be2 Ka2 42. Kc2 Ka1 43. Bf1 Ka2 44. Bh3 Ka1 45. Bg2 Ka2 46. Bf1 Ka1 47. Be2 Ka2
48. Bd1 Ka1 49. Kc1 Ka2 50. Bc2 Ka1 51. Bb1 b5 52. Bc2 Ka2 53. Bd1 Ka1 54. Be2
Ka2 55. Kc2 Ka1 56. Bf1 Ka2 57. Bh3 Ka1 58. Bg2 Ka2 59. Bf1 Ka1 60. Be2 Ka2 61.
Bd1 Ka1 62. Kc1 Ka2 63. Bc2 Ka1 64. Bb1 d5 65. Bc2 Ka2 66. Bd1 Ka1 67. Be2 Ka2
68. Kc2 Ka1 69. Bf1 Ka2 70. Bh3 Ka1 71. Bg2 Ka2 72. Bf1 Ka1 73. Be2 Ka2 74. Bd1
Ka1 75. Kc1 Ka2 76. Bc2 Ka1 77. Bb1 f6 78. Bc2 Ka2 79. Bd1 Ka1 80. Be2 Ka2 81.
Kc2 Ka1 82. Bf1 Ka2 83. Bh3 Ka1 84. Bg2 Ka2 85. Bf1 Ka1 86. Be2 Ka2 87. Bd1 Ka1
88. Kc1 Ka2 89. Bc2 Ka1 90. Bb1 h6 91. Bc2 Ka2 92. Bd1 Ka1 93. Be2 Ka2 94. Kc2
Ka1 95. Bf1 Ka2 96. Bh3 Ka1 97. Bg2 Ka2 98. Bf1 Ka1 99. Be2 Ka2 100. Bd1 Ka1
101. Kc1 Ka2 102. Bc2 Ka1 103. Bb1 a2 104. Bc2 f5 105. gxf5 h5 106. f6 h4 107.
f7 h3 108. f8=Q h2 109. Qh8 h1=Q+ 110. Qxh1 g4 111. Qh8 gxf3 112. Qxd4# 1-0
[/pgn]

[towforce]

Really impressive! As a human you very quickly start to understand the cyclic Zugzwang and the bishop moves. The real challenge is to translate this into code! Any ideas?

Today's most impressive NNs have been described by an AI expert as "stochastic parrots" (see the thread about the middling Go player who was able to train himself to beat the top Go engines). Has anyone come up with a way to give computers something like... curiosity?

Curiosity is the beginning of knowledge.