Endgame masterpiece from Stockfish-Komodo

[Alayan]

Komodo is having an incredible showing right now at CCC13 SemiFinals, only slightly behind Leelenstein, Lc0 and Stockfish after 50 games.

Stockfish just managed to break the equal score through an endgame same-color-bishop win that long looked drawn to all the spectators : https://www.chess.com/computer-chess-championship#event=ccc13-semifinals&game=104

SF steadily had its eval improving from move 37, where the SCB endgame began, to move 66 where it first broke the +2 barrier. Eval then became much more erratic, but with a general upward trend. On move 81, Komodo went above +0.76 for the first time, and then its eval also began to slowly grow.

The position on move 82 is definitely a forced, deep win, though at that stage many still thought SF must have been dreaming :
[d]2b5/8/p2p3k/P1pP3p/7P/2K5/1P2B3/8 w - - 67 82

But when did the decisive mistake actually occur ?

Here is the position where SF first crossed +2 :
[d]8/6k1/p2p4/P1pP3p/B6P/4K2b/1P6/8 w - - 35 66

However, considering how complicated this endgame is and how my homefish struggles to see anything several moves later in the game, it is quite likely that this is only the move where SF "saw it", not the actual first position that was won for white. but then, what was the deciding mistake ?

Is the starting position of the SCB endgame already a forced mate ? Both engines were below +1 at that point.

[d]6k1/1p6/p2p4/PbpP3p/4BPpP/8/1P3P1K/8 b - - 0 37

[zullil]

[pgn][Event "CCC13: Semifinals (10|5)"]
[Site "?"]
[Date "2020.04.03"]
[Round "1"]
[White "Stockfish"]
[Black "Komodo"]
[Result "1-0"]
[ECO "E60"]
[GameDuration "00:38:26"]
[GameEndTime "2020-04-03T15:01:58.972 PDT"]
[GameStartTime "2020-04-03T14:23:32.702 PDT"]
[Opening "King's Indian"]
[PlyCount "261"]
[TimeControl "600+5"]
[Variation "3.g3"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 c5 7. d5 e6 8. O-O exd5
9. cxd5 Re8 10. Re1 a6 11. a4 Nbd7 12. Bf4 Ng4 13. a5 Nde5 14. Ne4 h6 15. Qc1 g5
16. Bxe5 Nxe5 17. Nxe5 Bxe5 18. Nd2 Qf6 19. Nc4 Bd7 20. Ra3 Bb5 21. Nxe5 Rxe5
22. e4 Rae8 23. Rae3 g4 24. h3 h5 25. Qc3 Qg7 26. h4 R8e7 27. Kh2 Qh8 28. Qd2
Qg7 29. Qc3 Qh8 30. Qd2 Qg7 31. Qd1 f5 32. Qc1 fxe4 33. Rxe4 Rxe4 34. Rxe4 Rxe4
35. Bxe4 Qe5 36. Qf4 Qxf4 37. gxf4 Be8 38. Bf5 Bf7 39. f3 gxf3 40. Be6 f2 41.
Kg2 Kg7 42. Kxf2 Kf6 43. f5 Be8 44. Ke3 Ke5 45. Bc8 Bb5 46. f6 Kxf6 47. Kf4 Be2
48. Bxb7 Bc4 49. Bc6 Bf1 50. Be8 Be2 51. Ke3 Bg4 52. Ba4 Kg7 53. Be8 Kf6 54. Ba4
Kg6 55. Bc6 Bc8 56. Be8+ Kh6 57. Kf4 Bg4 58. Bc6 Kg6 59. Ke3 Bc8 60. Be8+ Kh6
61. Kf4 Bg4 62. Ba4 Kg6 63. Ke3 Bh3 64. Be8+ Kh6 65. Ba4 Kg7 66. Kf4 Kf6 67. Bd1
Kg6 68. Be2 Bc8 69. Bd3+ Kf6 70. Be2 Kg6 71. Bd3+ Kf6 72. Bf1 Kg6 73. Be2 Bb7
74. Bd3+ Kf6 75. Be2 Kg6 76. Ke4 Bc8 77. Ke3 Bb7 78. Ke4 Bc8 79. Ke3 Bb7 80. Kd2
Bc8 81. Kc3 Kh6 82. b4 cxb4+ 83. Kxb4 Kg6 84. Kb3 Bb7 85. Kc4 Bc8 86. Kb3 Bb7
87. Kc3 Kh6 88. Bd3 Kg7 89. Kd4 Bc8 90. Be2 Kg6 91. Bd3+ Kg7 92. Be2 Kg6 93. Kd3
Kh6 94. Ke4 Kg6 95. Kf4 Bb7 96. Bd3+ Kf6 97. Bc4 Bc8 98. Bd3 Bb7 99. Bf5 Bxd5
100. Bd3 Bb7 101. Bc4 Kg6 102. Be2 Bc8 103. Bf3 Bf5 104. Ke3 Bc8 105. Kd4 Bg4
106. Be4+ Kf7 107. Bd3 Ke8 108. Bxa6 Kd8 109. Ke4 Kc7 110. Bb5 Kb8 111. Kf4 Kc7
112. Be8 d5 113. Ke5 Bf3 114. Bb5 Kb7 115. Kd6 Kb8 116. Kc6 Ka7 117. Bd3 Kb8
118. Kb6 Be4 119. Bb5 d4 120. a6 d3 121. a7+ Ka8 122. Ba6 d2 123. Be2 d1=N 124.
Bxd1 Bb7 125. Bxh5 Bc6 126. Bd1 Bh1 127. h5 Bg2 128. h6 Bh1 129. h7 Bd5 130.
h8=Q+ Bg8 131. Qxg8# 1-0[/pgn]

[zullil]

[pgn][Event "CCC13: Semifinals (10|5)"]
[Site "?"]
[Date "2020.04.03"]
[Round "1"]
[White "Stockfish"]
[Black "Komodo"]
[Result "1-0"]
[ECO "E60"]
[GameDuration "00:38:26"]
[GameEndTime "2020-04-03T15:01:58.972 PDT"]
[GameStartTime "2020-04-03T14:23:32.702 PDT"]
[Opening "King's Indian"]
[PlyCount "261"]
[TimeControl "600+5"]
[Variation "3.g3"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 c5 7. d5 e6 8. O-O exd5
9. cxd5 Re8 10. Re1 a6 11. a4 Nbd7 12. Bf4 Ng4 13. a5 Nde5 14. Ne4 h6 15. Qc1 g5
16. Bxe5 Nxe5 17. Nxe5 Bxe5 18. Nd2 Qf6 19. Nc4 Bd7 20. Ra3 Bb5 21. Nxe5 Rxe5
22. e4 Rae8 23. Rae3 g4 24. h3 h5 25. Qc3 Qg7 26. h4 R8e7 27. Kh2 Qh8 28. Qd2
Qg7 29. Qc3 Qh8 30. Qd2 Qg7 31. Qd1 f5 32. Qc1 fxe4 33. Rxe4 Rxe4 34. Rxe4 Rxe4
35. Bxe4 Qe5 36. Qf4 Qxf4 37. gxf4 Be8 38. Bf5 Bf7 39. f3 gxf3 40. Be6 f2 41.
Kg2 Kg7 42. Kxf2 Kf6 43. f5 Be8 44. Ke3 Ke5 45. Bc8 Bb5 46. f6 Kxf6 47. Kf4 Be2
48. Bxb7 Bc4 49. Bc6 Bf1 50. Be8 Be2 51. Ke3 Bg4 52. Ba4 Kg7 53. Be8 Kf6 54. Ba4
Kg6 55. Bc6 Bc8 56. Be8+ Kh6 57. Kf4 Bg4 58. Bc6 Kg6 59. Ke3 Bc8 60. Be8+ Kh6
61. Kf4 Bg4 62. Ba4 Kg6 63. Ke3 Bh3 64. Be8+ Kh6 65. Ba4 Kg7 66. Kf4 Kf6 67. Bd1
Kg6 68. Be2 Bc8 69. Bd3+ Kf6 70. Be2 Kg6 71. Bd3+ Kf6 72. Bf1 Kg6 73. Be2 Bb7
74. Bd3+ Kf6 75. Be2 Kg6 76. Ke4 Bc8 77. Ke3 Bb7 78. Ke4 Bc8 79. Ke3 Bb7 80. Kd2
Bc8 81. Kc3 Kh6 82. b4 cxb4+ 83. Kxb4 Kg6 84. Kb3 Bb7 85. Kc4 Bc8 86. Kb3 Bb7
87. Kc3 Kh6 88. Bd3 Kg7 89. Kd4 Bc8 90. Be2 Kg6 91. Bd3+ Kg7 92. Be2 Kg6 93. Kd3
Kh6 94. Ke4 Kg6 95. Kf4 Bb7 96. Bd3+ Kf6 97. Bc4 Bc8 98. Bd3 Bb7 99. Bf5 Bxd5
100. Bd3 Bb7 101. Bc4 Kg6 102. Be2 Bc8 103. Bf3 Bf5 104. Ke3 Bc8 105. Kd4 Bg4
106. Be4+ Kf7 107. Bd3 Ke8 108. Bxa6 Kd8 109. Ke4 Kc7 110. Bb5 Kb8 111. Kf4 Kc7
112. Be8 d5 113. Ke5 Bf3 114. Bb5 Kb7 115. Kd6 Kb8 116. Kc6 Ka7 117. Bd3 Kb8
118. Kb6 Be4 119. Bb5 d4 120. a6 d3 121. a7+ Ka8 122. Ba6 d2 123. Be2 d1=N 124.
Bxd1 Bb7 125. Bxh5 Bc6 126. Bd1 Bh1 127. h5 Bg2 128. h6 Bh1 129. h7 Bd5 130.
h8=Q+ Bg8 131. Qxg8# 1-0[/pgn]

Maybe 51...Ke7 instead of 51...Bg4?

[the_real_greco]

This game makes Bh3!! look like regular Bh3.

If I had to guess, 37. Be8 seems like the loss. Kf7 or Kg7 look better (I like Kg7 because it's a dark square, but I can't see any real difference).

[zullil]

[pgn][Event "CCC13: Semifinals (10|5)"]
[Site "?"]
[Date "2020.04.03"]
[Round "1"]
[White "Stockfish"]
[Black "Komodo"]
[Result "1-0"]
[ECO "E60"]
[GameDuration "00:38:26"]
[GameEndTime "2020-04-03T15:01:58.972 PDT"]
[GameStartTime "2020-04-03T14:23:32.702 PDT"]
[Opening "King's Indian"]
[PlyCount "261"]
[TimeControl "600+5"]
[Variation "3.g3"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 c5 7. d5 e6 8. O-O exd5
9. cxd5 Re8 10. Re1 a6 11. a4 Nbd7 12. Bf4 Ng4 13. a5 Nde5 14. Ne4 h6 15. Qc1 g5
16. Bxe5 Nxe5 17. Nxe5 Bxe5 18. Nd2 Qf6 19. Nc4 Bd7 20. Ra3 Bb5 21. Nxe5 Rxe5
22. e4 Rae8 23. Rae3 g4 24. h3 h5 25. Qc3 Qg7 26. h4 R8e7 27. Kh2 Qh8 28. Qd2
Qg7 29. Qc3 Qh8 30. Qd2 Qg7 31. Qd1 f5 32. Qc1 fxe4 33. Rxe4 Rxe4 34. Rxe4 Rxe4
35. Bxe4 Qe5 36. Qf4 Qxf4 37. gxf4 Be8 38. Bf5 Bf7 39. f3 gxf3 40. Be6 f2 41.
Kg2 Kg7 42. Kxf2 Kf6 43. f5 Be8 44. Ke3 Ke5 45. Bc8 Bb5 46. f6 Kxf6 47. Kf4 Be2
48. Bxb7 Bc4 49. Bc6 Bf1 50. Be8 Be2 51. Ke3 Bg4 52. Ba4 Kg7 53. Be8 Kf6 54. Ba4
Kg6 55. Bc6 Bc8 56. Be8+ Kh6 57. Kf4 Bg4 58. Bc6 Kg6 59. Ke3 Bc8 60. Be8+ Kh6
61. Kf4 Bg4 62. Ba4 Kg6 63. Ke3 Bh3 64. Be8+ Kh6 65. Ba4 Kg7 66. Kf4 Kf6 67. Bd1
Kg6 68. Be2 Bc8 69. Bd3+ Kf6 70. Be2 Kg6 71. Bd3+ Kf6 72. Bf1 Kg6 73. Be2 Bb7
74. Bd3+ Kf6 75. Be2 Kg6 76. Ke4 Bc8 77. Ke3 Bb7 78. Ke4 Bc8 79. Ke3 Bb7 80. Kd2
Bc8 81. Kc3 Kh6 82. b4 cxb4+ 83. Kxb4 Kg6 84. Kb3 Bb7 85. Kc4 Bc8 86. Kb3 Bb7
87. Kc3 Kh6 88. Bd3 Kg7 89. Kd4 Bc8 90. Be2 Kg6 91. Bd3+ Kg7 92. Be2 Kg6 93. Kd3
Kh6 94. Ke4 Kg6 95. Kf4 Bb7 96. Bd3+ Kf6 97. Bc4 Bc8 98. Bd3 Bb7 99. Bf5 Bxd5
100. Bd3 Bb7 101. Bc4 Kg6 102. Be2 Bc8 103. Bf3 Bf5 104. Ke3 Bc8 105. Kd4 Bg4
106. Be4+ Kf7 107. Bd3 Ke8 108. Bxa6 Kd8 109. Ke4 Kc7 110. Bb5 Kb8 111. Kf4 Kc7
112. Be8 d5 113. Ke5 Bf3 114. Bb5 Kb7 115. Kd6 Kb8 116. Kc6 Ka7 117. Bd3 Kb8
118. Kb6 Be4 119. Bb5 d4 120. a6 d3 121. a7+ Ka8 122. Ba6 d2 123. Be2 d1=N 124.
Bxd1 Bb7 125. Bxh5 Bc6 126. Bd1 Bh1 127. h5 Bg2 128. h6 Bh1 129. h7 Bd5 130.
h8=Q+ Bg8 131. Qxg8# 1-0[/pgn]

Maybe 51...Ke7 instead of 51...Bg4?

+0.95 51... Ke7 52. Ba4 Bc4 53. Ke4 Kf6 54. Bd1 Kg6 55. b3 Bb5 56. Bf3 Bf1 57. Ke3 Bb5 58. Be4+ Kg7 59. Kf3 Kf6 60. Kf4 Be2 61. Bc2 Bb5 62. Ke4 Bf1 63. Bd1 Kg6 64. Kf4 Bb5 65. Kg3 Bf1 66. Kf2 Bd3 67. Bf3 Bb5 68. Be4+ Kg7 69. Kg3 Be2 70. Bc2 Kf6 71. Kf2 Bb5 72. Bd1 Kg6 73. Ke1 Kh6 74. Kd2 Kg6 75. Kc3 Bf1 76. Bf3 Bb5 77. Kb2 Kh6 78. Be4 Kg7 79. Kc2 Kf7 80. Bf3 Kg6 81. b4 cxb4 82. Kb3 Kh6 83. Be4 Kg7 84. Kxb4 Kf6 85. Bf3 Kg6 86. Bd1 Bd3 87. Kc3 Bb5 88. Kd4 Kh6 89. Bc2 Kg7 90. Bf5 Kf6 91. Bc8 Kg7 92. Be6 Kf6 93. Ke4 Kg6 94. Kf4 Kf6 95. Bc8 Bf1 96. Bd7 Bc4 97. Bc6 Bf1 98. Ke3 Kf7 99. Ba4 Bc4 100. Bd1 Kg6 101. Kd4 Bb5 102. Ke4 Bf1 103. Bc2 Bb5 104. Kf4+ Kf6 105. Bd1 Kg6 106. Bb3 Be2 107. Ba4 Kf6 108. Be8 Bg4 109. Bc6 Kg6 110. Ke3 Kf5 111. Bb7 Ke5 112. Bxa6 Kxd5 113. Bd3 Kc6 114. Kd4 Bf3 115. Kc4 Kb7 (depth 117, 10:15:42)

But after 51...Bg4?? as played by Komodo:

+4.78 52. Ba4 Ke5 53. Bb3 Bc8 54. Bc4 Kf6 55. Be2 Kg6 56. Kd2 Bb7 57. Kd3 Kh6 58. Kc3 Kg6 59. Kc4 Kh6 60. b3 Kg6 61. Kd3 Kh6 62. Kc3 Bc8 63. b4 cxb4+ 64. Kxb4 Kg6 65. Kc3 Kf6 66. Kd4 Kf5 67. Ke3 Kg6 68. Kf4 Bb7 69. Ke4 Bc8 70. Ke3 Bb7 71. Kf4 Bc8 72. Bf1 Kf6 73. Bd3 Bb7 74. Bf5 Bxd5 75. Bd3 Bb7 76. Be2 Kg6 77. Ke3 Bc8 78. Bf3 Bd7 79. Bb7 Bb5 80. Be4+ Kf6 81. Bf3 Kg6 82. Kd4 Bd7 83. Be2 Bc8 84. Kd5 Kh6 85. Bd3 Bb7+ 86. Kxd6 Kg7 87. Kc5 (depth 64, 0:09:20)

[MikeB]

[pgn][Event "CCC13: Semifinals (10|5)"]
[Site "?"]
[Date "2020.04.03"]
[Round "1"]
[White "Stockfish"]
[Black "Komodo"]
[Result "1-0"]
[ECO "E60"]
[GameDuration "00:38:26"]
[GameEndTime "2020-04-03T15:01:58.972 PDT"]
[GameStartTime "2020-04-03T14:23:32.702 PDT"]
[Opening "King's Indian"]
[PlyCount "261"]
[TimeControl "600+5"]
[Variation "3.g3"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 c5 7. d5 e6 8. O-O exd5
9. cxd5 Re8 10. Re1 a6 11. a4 Nbd7 12. Bf4 Ng4 13. a5 Nde5 14. Ne4 h6 15. Qc1 g5
16. Bxe5 Nxe5 17. Nxe5 Bxe5 18. Nd2 Qf6 19. Nc4 Bd7 20. Ra3 Bb5 21. Nxe5 Rxe5
22. e4 Rae8 23. Rae3 g4 24. h3 h5 25. Qc3 Qg7 26. h4 R8e7 27. Kh2 Qh8 28. Qd2
Qg7 29. Qc3 Qh8 30. Qd2 Qg7 31. Qd1 f5 32. Qc1 fxe4 33. Rxe4 Rxe4 34. Rxe4 Rxe4
35. Bxe4 Qe5 36. Qf4 Qxf4 37. gxf4 Be8 38. Bf5 Bf7 39. f3 gxf3 40. Be6 f2 41.
Kg2 Kg7 42. Kxf2 Kf6 43. f5 Be8 44. Ke3 Ke5 45. Bc8 Bb5 46. f6 Kxf6 47. Kf4 Be2
48. Bxb7 Bc4 49. Bc6 Bf1 50. Be8 Be2 51. Ke3 Bg4 52. Ba4 Kg7 53. Be8 Kf6 54. Ba4
Kg6 55. Bc6 Bc8 56. Be8+ Kh6 57. Kf4 Bg4 58. Bc6 Kg6 59. Ke3 Bc8 60. Be8+ Kh6
61. Kf4 Bg4 62. Ba4 Kg6 63. Ke3 Bh3 64. Be8+ Kh6 65. Ba4 Kg7 66. Kf4 Kf6 67. Bd1
Kg6 68. Be2 Bc8 69. Bd3+ Kf6 70. Be2 Kg6 71. Bd3+ Kf6 72. Bf1 Kg6 73. Be2 Bb7
74. Bd3+ Kf6 75. Be2 Kg6 76. Ke4 Bc8 77. Ke3 Bb7 78. Ke4 Bc8 79. Ke3 Bb7 80. Kd2
Bc8 81. Kc3 Kh6 82. b4 cxb4+ 83. Kxb4 Kg6 84. Kb3 Bb7 85. Kc4 Bc8 86. Kb3 Bb7
87. Kc3 Kh6 88. Bd3 Kg7 89. Kd4 Bc8 90. Be2 Kg6 91. Bd3+ Kg7 92. Be2 Kg6 93. Kd3
Kh6 94. Ke4 Kg6 95. Kf4 Bb7 96. Bd3+ Kf6 97. Bc4 Bc8 98. Bd3 Bb7 99. Bf5 Bxd5
100. Bd3 Bb7 101. Bc4 Kg6 102. Be2 Bc8 103. Bf3 Bf5 104. Ke3 Bc8 105. Kd4 Bg4
106. Be4+ Kf7 107. Bd3 Ke8 108. Bxa6 Kd8 109. Ke4 Kc7 110. Bb5 Kb8 111. Kf4 Kc7
112. Be8 d5 113. Ke5 Bf3 114. Bb5 Kb7 115. Kd6 Kb8 116. Kc6 Ka7 117. Bd3 Kb8
118. Kb6 Be4 119. Bb5 d4 120. a6 d3 121. a7+ Ka8 122. Ba6 d2 123. Be2 d1=N 124.
Bxd1 Bb7 125. Bxh5 Bc6 126. Bd1 Bh1 127. h5 Bg2 128. h6 Bh1 129. h7 Bd5 130.
h8=Q+ Bg8 131. Qxg8# 1-0[/pgn]

Maybe 51...Ke7 instead of 51...Bg4?

+0.95 51... Ke7 52. Ba4 Bc4 53. Ke4 Kf6 54. Bd1 Kg6 55. b3 Bb5 56. Bf3 Bf1 57. Ke3 Bb5 58. Be4+ Kg7 59. Kf3 Kf6 60. Kf4 Be2 61. Bc2 Bb5 62. Ke4 Bf1 63. Bd1 Kg6 64. Kf4 Bb5 65. Kg3 Bf1 66. Kf2 Bd3 67. Bf3 Bb5 68. Be4+ Kg7 69. Kg3 Be2 70. Bc2 Kf6 71. Kf2 Bb5 72. Bd1 Kg6 73. Ke1 Kh6 74. Kd2 Kg6 75. Kc3 Bf1 76. Bf3 Bb5 77. Kb2 Kh6 78. Be4 Kg7 79. Kc2 Kf7 80. Bf3 Kg6 81. b4 cxb4 82. Kb3 Kh6 83. Be4 Kg7 84. Kxb4 Kf6 85. Bf3 Kg6 86. Bd1 Bd3 87. Kc3 Bb5 88. Kd4 Kh6 89. Bc2 Kg7 90. Bf5 Kf6 91. Bc8 Kg7 92. Be6 Kf6 93. Ke4 Kg6 94. Kf4 Kf6 95. Bc8 Bf1 96. Bd7 Bc4 97. Bc6 Bf1 98. Ke3 Kf7 99. Ba4 Bc4 100. Bd1 Kg6 101. Kd4 Bb5 102. Ke4 Bf1 103. Bc2 Bb5 104. Kf4+ Kf6 105. Bd1 Kg6 106. Bb3 Be2 107. Ba4 Kf6 108. Be8 Bg4 109. Bc6 Kg6 110. Ke3 Kf5 111. Bb7 Ke5 112. Bxa6 Kxd5 113. Bd3 Kc6 114. Kd4 Bf3 115. Kc4 Kb7 (depth 117, 10:15:42)

But after 51...Bg4?? as played by Komodo:

+4.78 52. Ba4 Ke5 53. Bb3 Bc8 54. Bc4 Kf6 55. Be2 Kg6 56. Kd2 Bb7 57. Kd3 Kh6 58. Kc3 Kg6 59. Kc4 Kh6 60. b3 Kg6 61. Kd3 Kh6 62. Kc3 Bc8 63. b4 cxb4+ 64. Kxb4 Kg6 65. Kc3 Kf6 66. Kd4 Kf5 67. Ke3 Kg6 68. Kf4 Bb7 69. Ke4 Bc8 70. Ke3 Bb7 71. Kf4 Bc8 72. Bf1 Kf6 73. Bd3 Bb7 74. Bf5 Bxd5 75. Bd3 Bb7 76. Be2 Kg6 77. Ke3 Bc8 78. Bf3 Bd7 79. Bb7 Bb5 80. Be4+ Kf6 81. Bf3 Kg6 82. Kd4 Bd7 83. Be2 Bc8 84. Kd5 Kh6 85. Bd3 Bb7+ 86. Kxd6 Kg7 87. Kc5 (depth 64, 0:09:20)

correct - Ke7 is the only move that will possibly hold the draw

Stockfish - Komodo 1-0, CCC13: Semifinals (10|5) 2020
4B3/8/p2p1k2/P1pP3p/7P/4K3/1P2b3/8 b - - 0 1

Analysis by Honey XI-r1:

1. +/- (0.83): 51...Ke7 52.Ba4 Bc4 53.Ke4 Kf6 54.Bc2 Bf1 55.Bd1 Kg6 56.Ke3 Bc4 57.Kd2 Bb5 58.Kc3 Bf1 59.b4 cxb4+ 60.Kxb4 Bb5 61.Kc3 Kh6 62.Kd4 Kg6 63.Ke4 Bc4 64.Ba4 Kf6 65.Be8 Be2 66.Kd4 Bg4 67.Ba4 Be2 68.Ke3 Bg4 69.Bb3 Ke5 70.Bc4 Bc8 71.Be2 Bg4 72.Bxa6 Kxd5 73.Bd3
2. +- (15.25): 51...Bg4 52.Ba4 Ke5 53.Bb3 Bd7 54.Bc4 Bc8 55.Be2 Kxd5 56.Bxh5 Ke5 57.Bf3 Be6 58.Be2 c4 59.h5 d5 60.Kd2 d4 61.b3 c3+ 62.Kc2 Bc8 63.h6 Kf6 64.Bd3 Bb7 65.b4 Bc8 66.Be4 Bd7 67.Kd3 Ke5 68.h7 Bb5+ 69.Kc2 Kxe4 70.h8Q Kd5 71.Qh5+ Ke4 72.Qg6+ Ke5 73.Qg5+ Ke4 74.Qe7+ Kd5 75.Qc5+ Ke4 76.Qc8 Bd3+ 77.Kc1 Kd5 78.Qc5+ Ke4 79.Qe7+ Kd5 80.Qf7+ Ke5 81.Qh5+ Ke4 82.Qh7+ Ke3 83.Qh3+ Ke4 84.Qe6+ Kf4 85.Qd5 Ke3
3. +- (28.72): 51...Bd1 52.Bc6 Bb3 53.Kd3 Ke5 54.Bb7 Bxd5 55.Bxa6 Bc6 56.b4 Ke6 57.b5 Bg2 58.Bc8+ Ke7 59.b6 Kd8 60.Bf5 Bf1+ 61.Kd2 d5 62.Bg6 Bg2 63.Bxh5 d4 64.Be2 Ke7 65.a6 Kd6 66.h5 Be4 67.h6 Bh7 68.a7 c4 69.Bf3 c3+ 70.Kc1 Bf5 71.a8Q
4. +- (51.09): 51...Bc4 52.Bxh5 Bxd5 53.Be2 Bb7 54.Kf4 Bc8 55.h5 Kg7 56.Kg5 Kh7 57.Bd3+ Kh8 58.h6 Bb7 59.Kf5 Bc8+ 60.Kf6 Bb7 61.Be2 Kh7 62.Ke6 d5 63.Bf3 Bc8+ 64.Kd6 c4 65.Bxd5 c3 66.bxc3 Bg4 67.Ke5 Be2 68.Kd4 Kg6 69.Be4+ Kg5 70.Bb7 Kf5 71.h7 Bb5 72.Be4+ Kg5 73.h8Q
White is better

(, 05.04.2020)

[Chessqueen]

The real masterpiece and best Endgame ever happened on this Website http://www.tcec-chess.com/archive.html? ... p&game=164 where Ethereal stole the game in a masterful way .