stockfish aspiration window and strength at fixed depth

[Uri Blass]

I wonder if increasing the aspiration window may do stockfish weaker at fixed depth.

I tested some hard endgame tablebases position with stockfish.
normal stockfish could see a win for white at depth 57

stockfish with bigger aspiration window could not see a win for white even at depth 58

I added in the stockfish code the line
AspirationDelta+=10; before
alpha = Max(ValueByIteration[Iteration - 1]- AspirationDelta, -VALUE_INFINITE);


New game - Stockfish 2.0.j
[D]8/2k5/1p4R1/1K6/P2b4/8/8/8 w - - 0 1

Analysis by Stockfish 2.0.1 JA:

56.Kb5-c4
+- (2.94) Depth: 1/1 00:00:00
56.Kb5-c4 Bd4-c5
+- (3.07) Depth: 2/2 00:00:00
56.Kb5-c4 Bd4-c5 57.Kc4-d5
+- (3.11) Depth: 3/3 00:00:00
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-d7 58.Rg6-g7+ Bc5-e7
+- (3.31) Depth: 4/6 00:00:00
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-d7 58.Rg6-g7+ Bc5-e7
+- (3.31) Depth: 5/6 00:00:00
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-d7 58.Rg6-g7+ Bc5-e7
+- (3.19) Depth: 6/6 00:00:01 1kN
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-d7 58.Rg6-g7+ Bc5-e7 59.Rg7-h7
+- (3.19) Depth: 6/7 00:00:01 2kN
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-d7 58.Rg6-g7+ Bc5-e7 59.Rg7-h7
+- (3.31) Depth: 7/7 00:00:01 2kN
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-d7 58.Rg6-g7+ Bc5-e7 59.Rg7-h7
+- (3.43) Depth: 7/7 00:00:01 2kN
56.Kb5-c4 Bd4-f2 57.Kc4-d5 Kc7-b7 58.Rg6-g7+ Kb7-a6 59.Rg7-h7 Bf2-c5
+- (3.39) Depth: 7/8 00:00:01 3kN
56.Kb5-c4 Bd4-f2 57.Kc4-d5 Kc7-b7 58.Rg6-c6 Bf2-c5 59.Rc6-h6 Kb7-a6 60.Rh6-e6 Ka6-a5
+- (3.39) Depth: 8/10 00:00:01 8kN
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-b7 58.Rg6-h6 Kb7-a6 59.Rh6-e6 Ka6-a5
+- (3.27) Depth: 9/10 00:00:01 11kN
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-b7 58.Rg6-h6 Kb7-a6 59.Rh6-e6 Ka6-a5 60.Re6-e4 b6-b5
+- (3.27) Depth: 9/10 00:00:01 13kN
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-b7 58.Rg6-g7+ Kb7-a6 59.Kd5-c4 Bc5-e3 60.Rg7-h7 Be3-f4 61.Rh7-h5 Bf4-e3 62.Kc4-d5 Ka6-a5
+- (3.27) Depth: 10/14 00:00:01 18kN
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-b7 58.Rg6-g7+ Kb7-a6 59.Kd5-c4 Bc5-e3 60.Rg7-h7 Be3-f4 61.Rh7-h5 Bf4-e3 62.Kc4-d5 Ka6-a5
+- (3.27) Depth: 11/14 00:00:01 22kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-d6 58.Rg7-b7
+- (3.35) Depth: 11/14 00:00:01 26kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-d6 58.Rg7-b7
+- (3.43) Depth: 11/14 00:00:01 27kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-d6 58.Rg7-b7
+- (3.59) Depth: 11/14 00:00:01 29kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-d6 58.Rg7-b7 Bf2-d4 59.Rb7xb6+ Kd6-d5 60.a4-a5
+- (3.91) Depth: 11/14 00:00:01 39kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-d4 60.Kc6-d5 Bd4-e3 61.Kd5-e4 Be3-c5 62.Rh7-g7
+- (3.91) Depth: 11/14 00:00:01 51kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-d4 60.Rh7-b7+ Kb8-c8 61.Rb7-e7 Kc8-b8 62.Re7-d7 Bd4-c5 63.Rd7-c7 Bc5-d4 64.Rc7-d7
+- (3.87) Depth: 12/17 00:00:01 58kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-d4 60.Rh7-b7+ Kb8-c8 61.Rb7-e7 Kc8-b8 62.Re7-h7 Bd4-f2 63.Kc6-d5 Kb8-c8 64.Rh7-g7 Bf2-c5 65.Kd5-c6 Kc8-b8 66.a4-a5 b6xa5 67.Kc6xc5
+- (3.87) Depth: 13/23 00:00:01 71kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-d4 60.Rh7-b7+ Kb8-c8 61.Rb7-c7+ Kc8-b8 62.Rc7-f7 Bd4-c5 63.a4-a5 b6xa5 64.Kc6xc5
+- (3.95) Depth: 14/23 00:00:01 80kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-d4 60.Rh7-b7+ Kb8-c8 61.Rb7-c7+ Kc8-b8 62.Rc7-f7 Bd4-c5 63.a4-a5 b6xa5 64.Kc6xc5
+- (4.04) Depth: 14/23 00:00:01 85kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-d4 60.Rh7-b7+ Kb8-c8 61.Rb7-c7+ Kc8-b8 62.Rc7-f7 Bd4-e3 63.Rf7-b7+ Kb8-a8 64.Rb7-f7 Ka8-b8
+- (4.04) Depth: 14/23 00:00:01 93kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-d4 60.Rh7-b7+ Kb8-c8 61.Rb7-c7+ Kc8-b8 62.Rc7-f7 Bd4-e3 63.Rf7-b7+ Kb8-a8 64.Rb7-e7 Be3-f2 65.Re7-f7 Bf2-e3 66.Rf7-b7 Be3-c5 67.Rb7-f7 Bc5-e3
+- (3.91) Depth: 15/24 00:00:01 118kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-c5 62.Re7-f7 Bc5-e3 63.Rf7-b7 Be3-c5 64.Rb7-h7 Bc5-f2 65.Rh7-d7 Bf2-c5 66.Rd7-g7 Bc5-e3 67.Rg7-b7
+- (3.91) Depth: 16/24 00:00:01 161kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-c5 62.Re7-f7 Bc5-e3 63.Rf7-b7 Be3-c5 64.Rb7-h7 Bc5-e3 65.Kc6-d5 Ka8-b8 66.Kd5-c6 Be3-f2 67.Rh7-f7 Bf2-e3 68.Rf7-b7+
+- (3.87) Depth: 17/25 00:00:01 200kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-c5 62.Re7-f7 Bc5-e3 63.Rf7-b7 Be3-c5 64.Rb7-h7 Bc5-e3 65.Kc6-d5 Ka8-b8 66.Rh7-f7 Kb8-c8 67.Rf7-g7 Kc8-b8 68.Rg7-h7 Kb8-c8 69.Kd5-e4 Be3-c5 70.Rh7-g7
+- (3.87) Depth: 18/29 00:00:02 241kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-c5 62.Re7-f7 Bc5-e3 63.Rf7-b7 Be3-c5 64.Rb7-h7 Bc5-e3 65.Kc6-d5 Ka8-b8 66.Rh7-f7 Kb8-c8 67.Rf7-g7 Be3-f4 68.Rg7-h7
+- (3.87) Depth: 19/29 00:00:02 291kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-c5 62.Re7-f7 Bc5-e3 63.Rf7-b7 Be3-c5 64.Rb7-h7 Bc5-e3 65.Kc6-d5 Ka8-b8 66.Rh7-f7 Kb8-c8 67.Rf7-g7 Be3-f4 68.Rg7-h7
+- (3.87) Depth: 20/29 00:00:02 357kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-c5 62.Re7-f7 Bc5-e3 63.Rf7-b7 Be3-c5 64.Rb7-d7 Bc5-e3 65.Kc6-d5 Ka8-b8 66.Rd7-g7 Kb8-c8 67.Rg7-f7 Kc8-b8 68.Rf7-h7 Kb8-c8 69.Kd5-e4 Be3-c5 70.Rh7-g7 Kc8-b8
+- (3.87) Depth: 21/30 00:00:03 457kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-d7 Ka8-b8 65.Rd7-f7 Bf2-e3 66.Rf7-b7+
+- (3.87) Depth: 22/30 00:00:03 581kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-d7 Ka8-b8 65.Rd7-f7 Bf2-e3 66.Rf7-b7+
+- (3.87) Depth: 23/30 00:00:03 700kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-f7 Bf2-e3 65.Rf7-d7 Be3-f2 66.Rd7-e7 Ka8-b8 67.Re7-d7 Bf2-e3 68.Rd7-b7+
+- (3.87) Depth: 24/30 00:00:04 873kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-f7 Bf2-e3 65.Rf7-d7 Be3-f2 66.Rd7-e7 Ka8-b8 67.Re7-f7 Bf2-g1 68.Rf7-b7+ Kb8-a8 69.Rb7-g7 Bg1-e3 70.Rg7-f7 Ka8-b8 71.Rf7-e7 Be3-g1
+- (3.87) Depth: 25/33 00:00:05 1112kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-f7 Bf2-e3 65.Rf7-d7 Be3-f2 66.Rd7-e7 Ka8-b8 67.Re7-f7 Bf2-e3 68.Rf7-b7+
+- (3.87) Depth: 26/33 00:00:05 1425kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-f7 Bf2-e3 65.Kc6-d5 Ka8-b8 66.Rf7-g7 Be3-c5 67.Rg7-f7 Bc5-e3
+- (3.87) Depth: 27/33 00:00:06 1910kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-f7 Bf2-e3 65.Kc6-d5 Ka8-b8 66.Rf7-d7 Be3-f2 67.Rd7-g7 Bf2-e3 68.Rg7-f7 Kb8-a8 69.Rf7-e7 Be3-f2 70.Re7-f7 Bf2-e3
+- (3.87) Depth: 28/33 00:00:06 2409kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-f7 Bf2-e3 65.Kc6-d5 Ka8-b8 66.Rf7-d7 Be3-f2 67.Rd7-g7 Bf2-e3 68.Rg7-f7 Kb8-c8 69.Rf7-f3 Be3-g1 70.Kd5-c6 Kc8-b8 71.Rf3-f8+ Kb8-a7
+- (3.83) Depth: 29/40 00:00:07 3430kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-f7 Bf2-e3 65.Rf7-d7 Ka8-b8 66.Rd7-b7+
+- (3.83) Depth: 30/40 00:00:08 4392kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-f7 Bf2-e3 65.Rf7-d7 Ka8-b8 66.Kc6-b5 Be3-f2 67.Rd7-h7 Bf2-d4 68.Kb5-c4 Bd4-f2 69.Rh7-f7 Bf2-e3 70.Rf7-g7 Be3-f2 71.Rg7-f7
+- (3.83) Depth: 31/40 00:00:08 5299kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-f7 Bf2-e3 65.Rf7-d7 Ka8-b8 66.Kc6-b5 Be3-f2 67.Rd7-h7 Bf2-e3 68.Kb5-c4 Kb8-c8 69.Kc4-d5 Kc8-b8 70.Rh7-f7 Kb8-c8 71.Kd5-c6 Kc8-b8
+- (3.83) Depth: 32/40 00:00:09 6447kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-f7 Bf2-e3 65.Rf7-d7 Ka8-b8 66.Kc6-b5 Be3-f2 67.Rd7-h7 Bf2-e3 68.Kb5-c4 Kb8-c8 69.Rh7-f7 Be3-c5 70.Rf7-g7 Bc5-f2 71.Kc4-d5 Bf2-e3
+- (3.83) Depth: 33/40 00:00:11 8222kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-f7 Bf2-e3 65.Rf7-d7 Ka8-b8 66.Kc6-b5 Be3-f2 67.Rd7-h7 Bf2-e3 68.Kb5-c4 Kb8-c8 69.Rh7-f7 Kc8-b8 70.Rf7-h7
+- (3.87) Depth: 34/40 00:00:12 9490kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-f7 Bf2-e3 65.Rf7-d7 Ka8-b8 66.Kc6-b5 Be3-f2 67.Rd7-h7 Bf2-e3 68.Kb5-c4 Kb8-c8 69.Rh7-f7 Kc8-b8 70.Rf7-h7
+- (3.87) Depth: 35/40 00:00:14 11623kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-f2 62.Re7-h7 Ka8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-f7 Bf2-d4 65.Kc6-d5 Bd4-e3 66.Rf7-e7 Be3-c5 67.Re7-g7 Bc5-e3 68.Rg7-f7 Ka8-b8 69.Rf7-e7 Be3-c5 70.Re7-d7 Bc5-f2 71.Rd7-h7 Kb8-a8
+- (3.87) Depth: 36/40 00:00:19 16140kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-h7 Bf2-e3 60.Rh7-b7+ Kb8-a8 61.Rb7-e7 Be3-d4 62.Re7-h7 Bd4-e3 63.Rh7-d7 Be3-g1 64.Rd7-f7 Bg1-d4 65.Rf7-b7 Bd4-c5 66.Rb7-d7 Bc5-e3 67.Rd7-e7
+- (3.79) Depth: 37/40 00:00:24 20694kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-d4 61.Re7-h7 Bd4-e3 62.Rh7-d7 Be3-g1 63.Rd7-f7 Bg1-d4 64.Kc6-b5 Bd4-e3 65.Kb5-c6 Be3-d4
+- (3.87) Depth: 37/40 00:00:28 24612kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-d4 61.Re7-h7 Bd4-e3 62.Rh7-d7 Be3-g1 63.Kc6-b5 Ka8-b8 64.Kb5-c4 Bg1-e3 65.Kc4-d5 Be3-g1 66.Kd5-c6 Bg1-e3 67.Rd7-b7+
+- (3.87) Depth: 38/40 00:00:31 28050kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-d4 61.Re7-h7 Bd4-e3 62.Rh7-d7 Be3-g1 63.Kc6-b5 Ka8-b8 64.Kb5-c4 Bg1-e3 65.Kc4-d5 Be3-g1 66.Rd7-g7 Bg1-e3 67.Rg7-h7 Kb8-c8 68.Kd5-e4 Be3-c5 69.Rh7-g7 Bc5-f2 70.Ke4-d5 Bf2-e3 71.Rg7-h7 Be3-f2
+- (3.87) Depth: 39/40 00:00:35 31917kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-d4 61.Re7-h7 Bd4-e3 62.Rh7-d7 Be3-g1 63.Kc6-b5 Ka8-b8 64.Kb5-c4 Bg1-e3 65.Kc4-d5 Be3-g1 66.Rd7-g7 Bg1-e3 67.Rg7-h7 Kb8-c8 68.Kd5-e4 Be3-c5 69.Rh7-g7 Bc5-f2 70.Ke4-d5 Bf2-e3 71.Rg7-h7 Be3-f2
+- (3.87) Depth: 40/45 00:00:40 36475kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-d4 61.Re7-h7 Bd4-e3 62.Rh7-d7 Be3-g1 63.Kc6-b5 Ka8-b8 64.Kb5-c4 Bg1-e3 65.Kc4-d5 Be3-g1 66.Rd7-g7 Bg1-e3 67.Rg7-h7 Kb8-c8 68.Rh7-f7 Kc8-b8 69.Kd5-e4 Be3-c5 70.Rf7-g7 Kb8-c8 71.Ke4-d5 Bc5-e3
+- (3.87) Depth: 41/45 00:00:47 42688kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-d4 61.Re7-h7 Bd4-e3 62.Rh7-d7 Be3-g1 63.Kc6-b5 Ka8-b8 64.Kb5-c4 Bg1-e3 65.Kc4-d5 Be3-g1 66.Rd7-g7 Bg1-e3 67.Rg7-h7 Kb8-c8 68.Rh7-f7 Kc8-b8 69.Kd5-e4 Be3-c5 70.Rf7-g7 Kb8-c8 71.Ke4-d5 Bc5-e3
+- (3.87) Depth: 42/45 00:00:53 49090kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-d4 61.Re7-h7 Bd4-e3 62.Rh7-d7 Be3-g1 63.Kc6-b5 Ka8-b8 64.Kb5-c4 Bg1-f2 65.Rd7-e7 Bf2-c5 66.Re7-d7 Bc5-f2
+- (3.83) Depth: 43/45 00:01:13 65718kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-d4 61.Re7-h7 Bd4-e3 62.Rh7-d7 Be3-g1 63.Kc6-b5 Ka8-b8 64.Kb5-c4 Bg1-f2 65.Rd7-e7 Bf2-c5 66.Re7-h7 Bc5-e3 67.Rh7-d7 Be3-f2
+- (3.83) Depth: 44/45 00:01:28 80871kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-d8 59.Rg7-f7 Kd8-e8 60.Rf7-d7 Be3-g5 61.Rd7-b7 Bg5-e3 62.Rb7xb6
+- (3.91) Depth: 45/45 00:01:33 85262kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-f7 Ka8-b8 61.Rf7-e7 Be3-f2 62.Re7-b7+ Kb8-a8 63.Rb7-f7 Bf2-e3 64.Kc6-d5 Ka8-b8 65.Rf7-h7 Kb8-c8 66.Rh7-a7 Kc8-b8 67.Ra7-f7 Kb8-c8 68.Rf7-h7 Kc8-b8 69.Kd5-c4 Kb8-c8 70.Kc4-d5
+- (3.83) Depth: 45/45 00:01:47 100108kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-f7 Ka8-b8 61.Rf7-e7 Be3-d4 62.Re7-b7+ Kb8-a8 63.Rb7-d7 Bd4-e3 64.Rd7-h7 Ka8-b8 65.Rh7-g7 Kb8-a8 66.Rg7-d7 Ka8-b8 67.Rd7-h7 Be3-f2 68.Rh7-b7+ Kb8-a8 69.Rb7-f7 Bf2-e3 70.Kc6-d5 Ka8-b8 71.Rf7-h7 Kb8-c8
+- (3.83) Depth: 46/45 00:01:56 109975kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-f7 Ka8-b8 61.Rf7-e7 Be3-d4 62.Re7-b7+ Kb8-a8 63.Rb7-d7 Bd4-e3 64.Rd7-h7 Ka8-b8 65.Rh7-g7 Kb8-a8 66.Rg7-d7 Ka8-b8 67.Rd7-h7 Be3-f2 68.Rh7-b7+ Kb8-c8 69.Rb7-f7 Bf2-c5 70.a4-a5 b6xa5 71.Kc6xc5 Kc8-d8
+- (3.83) Depth: 47/45 00:02:16 126192kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-f7 Ka8-b8 61.Rf7-e7 Be3-d4 62.Re7-b7+ Kb8-a8 63.Rb7-d7 Bd4-e3 64.Rd7-h7 Ka8-b8 65.Rh7-g7 Kb8-a8 66.Rg7-d7 Ka8-b8 67.Rd7-h7 Be3-f2 68.Rh7-b7+ Kb8-a8 69.Rb7-f7 Bf2-e3 70.Kc6-b5 Ka8-b8 71.Kb5-c4 Kb8-c8
+- (3.83) Depth: 48/45 00:02:44 154372kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-f7 Ka8-b8 61.Rf7-e7 Be3-d4 62.Re7-b7+ Kb8-a8 63.Rb7-d7 Bd4-e3 64.Rd7-h7 Ka8-b8 65.Rh7-g7 Kb8-a8 66.Rg7-d7 Ka8-b8 67.Rd7-h7 Be3-f2 68.Rh7-b7+ Kb8-a8 69.Rb7-f7 Bf2-e3 70.Kc6-b5 Ka8-b8 71.Kb5-c4 Kb8-c8
+- (3.83) Depth: 49/45 00:03:11 181082kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-h7 Be3-d4 61.Kc6-d5 Bd4-e3 62.Kd5-c6
+- (3.75) Depth: 50/45 00:04:09 235057kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c4 Kc8-d8 59.Rg7-h7 Kd8-c8 60.Rh7-h3 Be3-g1 61.Rh3-f3 Kc8-b7 62.Kc4-b5 Kb7-c8 63.Rf3-f8+ Kc8-b7 64.Rf8-f7+ Kb7-c8 65.Kb5-c6 Kc8-b8 66.Rf7-b7+ Kb8-a8 67.Rb7-g7 Bg1-d4 68.Rg7-c7 Bd4-f2 69.Rc7-f7 Bf2-d4 70.Kc6-d5 Bd4-e3 71.Rf7-d7 Be3-f2
+- (3.87) Depth: 50/47 00:04:55 279751kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-f2 61.Kc6-b5 Ka8-b8 62.Re7-f7 Bf2-e3 63.Rf7-d7 Kb8-c8 64.Kb5-c6 Kc8-b8 65.Rd7-b7+
+- (3.87) Depth: 51/47 00:06:00 347341kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-f2 61.Kc6-b5 Ka8-b8 62.Re7-f7 Bf2-e3 63.Rf7-d7 Kb8-c8 64.Kb5-c6 Kc8-b8 65.Rd7-f7 Kb8-a8 66.Rf7-h7 Ka8-b8 67.Rh7-b7+
+- (3.87) Depth: 52/47 00:07:14 423359kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-f2 61.Re7-f7 Bf2-e3 62.Rf7-b7 Be3-g1 63.Rb7-g7 Bg1-d4 64.Rg7-g4 Bd4-f2 65.Rg4-f4 Bf2-g1 66.Rf4-g4 Bg1-e3 67.Kc6-b5 Ka8-b7 68.Rg4-e4 Be3-f2 69.Re4-e7+ Kb7-b8 70.Re7-f7 Bf2-e3 71.Kb5-c4 Kb8-c8
+- (3.79) Depth: 53/47 00:08:50 505201kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-f2 61.Re7-f7 Bf2-e3 62.Rf7-f8+ Ka8-a7 63.Rf8-f3 Be3-d4 64.Rf3-d3 Bd4-f2 65.Kc6-b5 Ka7-b8 66.Rd3-d7 Bf2-e3 67.Kb5-c6 Be3-f2 68.Rd7-f7 Bf2-e3 69.Rf7-e7 Be3-f2 70.Re7-b7+ Kb8-c8 71.Rb7-f7 Bf2-c5
+- (3.83) Depth: 53/47 00:09:40 553420kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-f2 61.Re7-f7 Bf2-e3 62.Rf7-f8+ Ka8-a7 63.Rf8-f3 Be3-d4 64.Rf3-d3 Bd4-f2 65.Kc6-b5 Ka7-b8 66.Rd3-d7 Bf2-e3 67.Kb5-c6 Be3-f2 68.Rd7-b7+ Kb8-c8 69.Rb7-f7 Bf2-c5 70.Rf7-f3 Kc8-b8 71.a4-a5 b6xa5
+- (3.83) Depth: 54/47 00:11:01 607741kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-f2 61.Re7-f7 Bf2-e3 62.Rf7-f8+ Ka8-a7 63.Rf8-f3 Be3-d4 64.Rf3-d3 Bd4-f2 65.Kc6-b5 Ka7-b8 66.Rd3-d7 Bf2-e3 67.Kb5-c6 Be3-f2 68.Rd7-b7+ Kb8-c8 69.Rb7-f7 Bf2-c5 70.Rf7-b7 Bc5-d4 71.Rb7-d7 Bd4-f2
+- (3.83) Depth: 55/47 00:15:10 698112kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-b7+ Kb8-a8 60.Rb7-e7 Be3-f2 61.Re7-f7 Bf2-e3 62.Rf7-f8+ Ka8-a7 63.Rf8-f3 Be3-d4 64.Rf3-d3 Bd4-f2 65.Kc6-b5 Ka7-b8 66.Rd3-d7 Bf2-e3 67.Kb5-c6 Be3-f2 68.Rd7-b7+ Kb8-c8 69.Rb7-c7+ Kc8-b8 70.Rc7-e7 Bf2-d4 71.Re7-b7+ Kb8-c8
+- (3.83) Depth: 56/51 00:20:59 798926kN
56.Rg6-g4 Bd4-e3 57.Rg4-g3 Be3-d4 58.Rg3-f3 Kc7-b8 59.Rf3-f5 Bd4-e3 60.Kb5-a6 Kb8-c7 61.Rf5-b5 Be3-d4 62.Ka6-a7 Bd4-e3 63.Rb5-b3 Be3-c5 64.Rb3-c3 Kc7-c6 65.Ka7-a6 Kc6-c7 66.Rc3-c2 Kc7-b8 67.a4-a5 b6xa5 68.Rc2xc5 a5-a4 69.Rc5-c2 a4-a3 70.Rc2-c6
+- (3.91) Depth: 57/51 00:35:46 1004072kN
56.Rg6-g4 Bd4-e3 57.Rg4-g3 Be3-d4 58.Rg3-f3 Kc7-b8 59.Rf3-f7 Kb8-c8 60.Kb5-a6 Bd4-e3 61.Rf7-f5 Kc8-c7 62.Rf5-b5 Be3-d4 63.Ka6-a7 Kc7-c6 64.Ka7-b8 Bd4-h8 65.Rb5-b1
+- (4.00) Depth: 57/51 00:35:53 1009503kN
56.Rg6-g4 Bd4-e3 57.Rg4-g3 Be3-d4 58.Rg3-f3 Kc7-b8 59.Rf3-f7 Kb8-c8 60.Kb5-a6 Bd4-e3 61.Rf7-f5 Kc8-c7 62.Rf5-b5 Be3-d4 63.Ka6-a7 Kc7-c8 64.Rb5-b4 Bd4-f2 65.Rb4-c4+ Kc8-d8 66.Ka7-b7 Bf2-c5 67.a4-a5 b6xa5 68.Rc4xc5
+- (4.16) Depth: 57/51 00:36:21 1021473kN
56.Rg6-g4 Bd4-f6 57.Rg4-g3 Bf6-d4 58.Rg3-f3 Bd4-c5 59.Rf3-f7+ Kc7-c8 60.Kb5-a6 Bc5-e3 61.Rf7-f5 Kc8-c7 62.Rf5-b5 Be3-g1 63.Ka6-a7 Kc7-c6 64.Rb5-b1 Bg1-e3 65.Rb1-e1 Be3-c5 66.Ka7-a6 Kc6-d5 67.Re1-c1 Bc5-e3 68.Rc1-c2 Kd5-d4 69.Ka6-b7 Be3-f4 70.Kb7xb6 Kd4-d3 71.Rc2-c6 Bf4-e3+
+- (4.48) Depth: 57/51 00:36:37 1030632kN
56.Rg6-g4 Bd4-f6 57.Rg4-g3 Bf6-d4 58.Rg3-f3 Bd4-c5 59.a4-a5 b6xa5 60.Kb5xc5 Kc7-c8 61.Rf3-f7 a5-a4 62.Rf7-g7
+- (5.13) Depth: 57/51 00:36:48 1037002kN
56.Rg6-g4 Bd4-e3 57.Rg4-g7+ Kc7-c8 58.Rg7-h7 Be3-d4 59.Kb5-a6 Bd4-f2 60.Rh7-h5 Kc8-c7 61.Rh5-h8 Bf2-e3 62.Rh8-h7+ Kc7-c8 63.Rh7-h4 Be3-f2 64.Rh4-h7 Kc8-b8 65.Rh7-h5 Kb8-c7
+- (6.42) Depth: 57/51 00:38:39 1105617kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-d7 Kb8-c8 59.Rd7-f7 Bf2-d4 60.Kb5-a6 Bd4-c5 61.Rf7-f5 Kc8-c7 62.a4-a5 Kc7-d6 63.a5xb6 Bc5-e3 64.b6-b7 Be3-g1 65.b7-b8Q+ Kd6-e6 66.Qb8-g8+ Ke6xf5 67.Qg8xg1
+- (9.01) Depth: 57/51 00:39:06 1126686kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-d7 Kb8-c8 59.Rd7-f7 Bf2-g1 60.Rf7-f8+ Kc8-d7 61.Kb5-a6 b6-b5 62.a4xb5 Kd7-e7 63.Rf8-f3 Bg1-d4 64.b5-b6 Bd4-c5 65.b6-b7 Bc5-d6 66.Rf3-f1 Bd6-b8 67.Rf1-e1+
+- (14.18) Depth: 57/51 00:40:15 1181577kN

(, 08.01.2011)

New game - Stockfish 2.0.j
8/2k5/1p4R1/1K6/P2b4/8/8/8 w - - 0 1

Analysis by Stockfish 2.0.j:

56.Kb5-c4
+- (2.94) Depth: 1/1 00:00:00
56.Kb5-c4 Bd4-c5
+- (3.07) Depth: 2/2 00:00:00
56.Kb5-c4 Bd4-c5 57.Kc4-d5
+- (3.11) Depth: 3/3 00:00:00
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-d7 58.Rg6-g7+ Bc5-e7
+- (3.31) Depth: 4/6 00:00:00
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-d7 58.Rg6-g7+ Bc5-e7
+- (3.31) Depth: 5/6 00:00:00
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-d7 58.Rg6-g5
+- (3.51) Depth: 6/6 00:00:00 1kN
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-d7 58.Rg6-g7+ Bc5-e7 59.Rg7-h7
+- (3.19) Depth: 6/7 00:00:00 2kN
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-d7 58.Rg6-g7+ Bc5-e7 59.Rg7-h7
+- (3.38) Depth: 7/7 00:00:01 2kN
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-d7 58.Rg6-g7+ Bc5-e7 59.Rg7-h7
+- (3.55) Depth: 7/7 00:00:01 2kN
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Bc5-f8 58.Rg6-f6 Bf8-e7 59.Rf6-c6+ Kc7-b7
+- (3.55) Depth: 7/8 00:00:01 3kN
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-b7 58.Rg6-g7+ Kb7-a6 59.Kd5-c4 Bc5-e3 60.Rg7-g6 Ka6-b7
+- (3.31) Depth: 8/10 00:00:01 6kN
56.Kb5-c4 Bd4-c5 57.Kc4-d5 Kc7-b7 58.Rg6-g7+ Kb7-a6 59.Kd5-c4 Bc5-e3 60.Rg7-f7 Be3-c5 61.Kc4-d5 b6-b5 62.Rf7-f6+ Ka6-a5
+- (3.31) Depth: 9/14 00:00:01 12kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-d8 58.Rg7-b7 Bf2-c5 59.Kb5-c4 Bc5-e3 60.Kc4-d5 Be3-c5
+- (3.71) Depth: 9/14 00:00:01 20kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-d8 58.Rg7-f7 Bf2-c5 59.Kb5-c4 Bc5-e3 60.Rf7-b7 Kd8-e8 61.Kc4-d5
+- (3.67) Depth: 10/14 00:00:02 24kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-d8 58.Rg7-f7 Bf2-c5 59.Kb5-c4 Bc5-e3 60.Rf7-b7 Kd8-e8 61.Kc4-d5 Be3-c5 62.Rb7-h7 Bc5-e3
+- (3.63) Depth: 11/14 00:00:02 32kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-d8 58.Rg7-f7 Bf2-c5 59.Kb5-c4 Bc5-e3 60.Rf7-b7 Kd8-e8 61.Kc4-d5 Be3-c5 62.Rb7-h7 Bc5-e3 63.Rh7-b7
+- (3.63) Depth: 12/15 00:00:02 41kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-d8 58.Rg7-f7 Bf2-d4 59.Kb5-c4 Bd4-e3 60.Rf7-b7 Kd8-c8 61.Rb7-h7 Kc8-d8 62.Kc4-d5 Be3-c5 63.Rh7-b7 Kd8-c8 64.Rb7-f7 Kc8-b8 65.Kd5-e5 Kb8-c8 66.Ke5-d5
+- (3.71) Depth: 13/21 00:00:02 62kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-d8 58.Rg7-f7 Bf2-d4 59.Kb5-c4 Bd4-e3 60.Rf7-b7 Kd8-c8 61.Rb7-g7 Kc8-d8 62.Kc4-d5 Kd8-e8 63.Rg7-h7 Be3-c5 64.Rh7-b7 Bc5-e3 65.Rb7-h7
+- (3.71) Depth: 14/21 00:00:02 76kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-d8 58.Rg7-f7 Bf2-d4 59.Kb5-c6 Bd4-e3 60.Rf7-d7+ Kd8-c8 61.Rd7-e7 Be3-c5 62.Re7-e8#
+- (3.84) Depth: 15/21 00:00:02 105kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-d8 58.Rg7-f7 Bf2-d4 59.Kb5-c6 Bd4-e3 60.Rf7-d7+ Kd8-c8 61.Rd7-e7 Be3-c5 62.Re7-e8#
+- (3.97) Depth: 15/21 00:00:02 117kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-b7+
+- (3.87) Depth: 15/21 00:00:02 138kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-h7 Be3-f2 64.Rh7-b7+ Kb8-a8 65.Rb7-h7 Bf2-e3 66.Rh7-b7 Be3-c5 67.Rb7-c7 Bc5-e3
+- (3.87) Depth: 16/24 00:00:02 157kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Be3-c5 63.Kc6-d5 Ka8-b8 64.Rg7-f7 Bc5-e3 65.Kd5-c6
+- (3.95) Depth: 17/24 00:00:02 209kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Be3-c5 63.Kc6-d5 Ka8-b8 64.Rg7-f7 Bc5-e3 65.Kd5-e5 Kb8-c8
+- (3.95) Depth: 18/24 00:00:02 233kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Be3-c5 63.Kc6-b5 Bc5-d4 64.Rg7-c7 Bd4-e3 65.Kb5-c6 Ka8-b8 66.Rc7-h7 Kb8-a8 67.Rh7-g7
+- (3.95) Depth: 19/24 00:00:02 277kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-h7 Be3-f2 64.Rh7-b7+ Kb8-c8 65.Rb7-d7 Kc8-b8 66.Kc6-d5 Bf2-e3 67.Rd7-h7 Kb8-c8 68.Rh7-f7 Kc8-d8 69.Rf7-g7 Kd8-e8 70.Rg7-b7 Ke8-d8 71.Rb7-h7 Kd8-c8
+- (3.95) Depth: 20/32 00:00:02 323kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-h7 Be3-f2 64.Rh7-b7+ Kb8-a8 65.Rb7-d7 Ka8-b8 66.Kc6-d5 Bf2-e3 67.Rd7-h7 Kb8-c8 68.Rh7-f7 Kc8-d8 69.Rf7-g7 Kd8-e8 70.Rg7-b7 Ke8-d8 71.Rb7-h7 Kd8-c8
+- (3.95) Depth: 21/32 00:00:03 379kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-h7 Be3-f2 64.Rh7-b7+ Kb8-a8 65.Rb7-d7 Ka8-b8 66.Rd7-e7 Bf2-d4 67.Re7-b7+ Kb8-a8 68.Rb7-h7 Bd4-f2 69.Rh7-d7
+- (3.95) Depth: 22/32 00:00:03 464kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-d7 Be3-f2 64.Rd7-f7 Bf2-d4 65.Rf7-b7+ Kb8-a8 66.Rb7-h7 Bd4-e3 67.Rh7-f7 Ka8-b8 68.Rf7-b7+
+- (3.91) Depth: 23/32 00:00:04 709kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-d7 Be3-f2 64.Rd7-f7 Bf2-d4 65.Rf7-b7+ Kb8-a8 66.Rb7-h7 Bd4-e3 67.Rh7-f7 Ka8-b8 68.Rf7-b7+
+- (3.91) Depth: 24/32 00:00:04 884kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-d7 Be3-g1 64.Rd7-b7+ Kb8-a8 65.Rb7-h7 Bg1-e3 66.Kc6-d5 Ka8-b8 67.Kd5-c6 Kb8-a8
+- (3.91) Depth: 25/32 00:00:05 1080kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-b7+
+- (3.91) Depth: 26/32 00:00:05 1310kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-h7 Kb8-a8 64.Kc6-d5 Ka8-b8 65.Rh7-f7 Kb8-c8 66.Kd5-c6 Kc8-b8 67.Rf7-b7+
+- (3.91) Depth: 27/32 00:00:06 1640kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-h7 Kb8-a8 64.Kc6-d5 Ka8-b8 65.Rh7-f7 Kb8-c8 66.Kd5-c6 Kc8-b8 67.Rf7-b7+
+- (3.91) Depth: 28/32 00:00:07 1969kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-h7 Kb8-a8 64.Kc6-d5 Ka8-b8 65.Rh7-f7 Kb8-c8 66.Kd5-c6 Kc8-b8 67.Rf7-b7+
+- (3.91) Depth: 29/32 00:00:08 2456kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-h7 Kb8-a8 64.Kc6-d5 Ka8-b8 65.Rh7-f7 Kb8-c8 66.Kd5-c6 Kc8-b8 67.Rf7-b7+
+- (3.91) Depth: 30/32 00:00:08 3127kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-h7 Kb8-a8 64.Kc6-d5 Ka8-b8 65.Rh7-f7 Kb8-c8 66.Kd5-c6 Kc8-b8 67.Rf7-b7+
+- (3.91) Depth: 31/32 00:00:09 3867kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-h7 Kb8-a8 64.Kc6-d5 Ka8-b8 65.Rh7-f7 Kb8-c8 66.Kd5-c6 Kc8-b8 67.Rf7-h7
+- (3.91) Depth: 32/32 00:00:10 4994kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-h7 Kb8-a8 64.Kc6-d5 Ka8-b8 65.Rh7-f7 Kb8-c8 66.Kd5-c6 Kc8-b8 67.Rf7-b7+
+- (3.91) Depth: 33/32 00:00:12 6663kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-h7 Kb8-a8 64.Kc6-d5 Ka8-b8 65.Rh7-f7 Kb8-c8 66.Kd5-c6 Kc8-b8 67.Rf7-d7 Kb8-a8 68.Kc6-d5 Ka8-b8 69.Rd7-e7 Be3-c5 70.Re7-g7 Bc5-e3 71.Rg7-d7 Kb8-c8
+- (3.91) Depth: 34/35 00:00:14 8121kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-b8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kb8-a8 60.Rf7-h7 Ka8-b8 61.Rh7-b7+ Kb8-a8 62.Rb7-g7 Ka8-b8 63.Rg7-h7 Kb8-a8 64.Kc6-d5 Ka8-b8 65.Rh7-f7 Kb8-c8 66.Kd5-c6 Kc8-b8 67.Rf7-h7
+- (3.87) Depth: 35/35 00:00:18 10407kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-d6 58.Rg7-f7 Bf2-d4 59.Rf7-h7 Kd6-e5 60.Rh7-b7 Bd4-f2 61.Rb7xb6 Bf2-e3 62.a4-a5
+- (3.87) Depth: 36/35 00:00:24 14364kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Rg7-f7 Bf2-e3 59.Kb5-c6 Kc8-b8 60.Rf7-b7+ Kb8-c8 61.Rb7-e7 Be3-g5 62.Re7-c7+ Kc8-b8 63.Rc7-b7+
+- (4.01) Depth: 37/35 00:00:28 16405kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-g7+ Kb7-c8 60.Rg7-f7 Kc8-b8 61.Kb5-c4 Kb8-c8 62.Kc4-d5 Kc8-b8 63.Rf7-h7 Be3-f2 64.Rh7-g7 Kb8-c8 65.Rg7-f7 Bf2-e3 66.Kd5-c6 Kc8-b8 67.Kc6-d5 Kb8-c8
+- (4.00) Depth: 37/35 00:00:31 19530kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-g7+ Kb7-c8 60.Rg7-f7 Kc8-b8 61.Kb5-c4 Kb8-c8 62.Kc4-d5 Kc8-b8 63.Rf7-h7 Be3-f2 64.Rh7-g7 Kb8-c8 65.Rg7-f7 Bf2-e3 66.Kd5-c6 Kc8-b8 67.Rf7-b7+ Kb8-a8 68.Rb7-e7 Be3-g1 69.Kc6-b5 Ka8-b8 70.Re7-d7 Bg1-e3 71.Kb5-c6 Kb8-a8
+- (3.87) Depth: 38/35 00:00:47 25425kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-g7+ Kb7-c8 60.Rg7-f7 Kc8-b8 61.Kb5-c4 Kb8-c8 62.Kc4-d5 Kc8-b8 63.Rf7-h7 Be3-f2 64.Rh7-g7 Kb8-c8 65.Rg7-f7 Bf2-e3 66.Kd5-c6 Kc8-b8 67.Rf7-b7+ Kb8-a8 68.Rb7-d7 Ka8-b8 69.Kc6-b5 Be3-g1 70.Rd7-e7 Bg1-d4 71.Kb5-c4 Bd4-c5
+- (3.87) Depth: 39/35 00:00:56 29694kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-g3 Be3-f2 60.Rg3-g7+ Kb7-c8 61.Rg7-f7 Bf2-d4 62.Kb5-c6 Kc8-b8 63.Rf7-d7 Bd4-c5 64.a4-a5 b6xa5 65.Kc6xc5 Kb8-c8 66.Rd7-h7 Kc8-b8 67.Rh7-e7 Kb8-c8 68.Re7-h7
+- (4.01) Depth: 40/35 00:01:01 33237kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-g3 Be3-f2 60.Rg3-g7+ Kb7-c8 61.Rg7-f7 Bf2-d4 62.Kb5-c6 Kc8-b8 63.Rf7-b7+ Kb8-a8 64.Rb7-d7 Bd4-e3 65.Rd7-g7 Be3-d4 66.Rg7-e7 Bd4-f2 67.Re7-f7 Bf2-g1 68.Rf7-g7 Bg1-d4
+- (3.87) Depth: 40/35 00:01:09 37717kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-g3 Be3-d4 60.Rg3-g4 Bd4-e3 61.Rg4-e4 Be3-f2 62.Re4-e7+ Kb7-c8 63.Kb5-c6 Kc8-b8 64.Re7-b7+ Kb8-c8 65.Rb7-f7 Bf2-c5 66.a4-a5 b6xa5 67.Rf7-g7 Kc8-b8 68.Kc6xc5
+- (3.87) Depth: 41/35 00:01:21 46374kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-d4 60.Re8-e7+ Kb7-c8 61.Kb5-c6 Kc8-b8 62.Re7-b7+ Kb8-c8 63.Rb7-e7
+- (3.87) Depth: 42/35 00:01:47 54904kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-d4 60.Re8-e7+ Kb7-b8 61.Re7-d7 Bd4-e3 62.Kb5-c6 Kb8-a8 63.Kc6-d5 Ka8-b8 64.Rd7-e7 Be3-c5 65.Re7-g7 Bc5-e3 66.Rg7-f7 Kb8-c8 67.Rf7-e7 Be3-c5 68.Re7-h7 Bc5-e3 69.Rh7-f7 Kc8-b8 70.Rf7-e7
+- (3.87) Depth: 43/35 00:03:19 70879kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-d4 60.Re8-e7+ Kb7-b8 61.Kb5-c6 Kb8-a8 62.Kc6-d5 Bd4-g1 63.Kd5-c4 Ka8-b8 64.Re7-g7 Bg1-e3 65.Kc4-d3 Be3-c5 66.Kd3-e4 Kb8-c8 67.Rg7-h7 Kc8-b8 68.Rh7-f7 Kb8-c8 69.Rf7-g7 Bc5-f2 70.Rg7-f7 Bf2-c5
+- (3.87) Depth: 44/35 00:03:43 90010kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-d4 60.Re8-e7+ Kb7-b8 61.Kb5-c6 Bd4-g1 62.Re7-h7 Bg1-d4 63.Kc6-d5 Bd4-f2 64.Rh7-f7 Bf2-e3 65.Rf7-d7 Kb8-c8 66.Kd5-d6 Be3-d4 67.Rd7-c7+ Kc8-b8 68.Kd6-c6 Bd4-c5 69.Rc7-b7+ Kb8-c8 70.Rb7-f7 Kc8-b8 71.a4-a5 b6xa5
+- (3.87) Depth: 45/35 00:04:17 112340kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-d4 60.Re8-e7+ Kb7-c8 61.Re7-e4 Bd4-f2 62.Kb5-c6 Kc8-b8 63.Re4-e2 Bf2-g1 64.Re2-e8+ Kb8-a7 65.Kc6-b5 Bg1-d4 66.Re8-e7+ Ka7-b8 67.Kb5-c6 Bd4-g1 68.Re7-b7+ Kb8-a8 69.Rb7-h7 Bg1-d4 70.Kc6-b5 Bd4-e3 71.Rh7-c7 Ka8-b8
+- (3.87) Depth: 46/47 00:04:45 133401kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-d4 60.Re8-e7+ Kb7-c8 61.Re7-h7 Bd4-e3 62.Kb5-c6 Kc8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-e7 Be3-f2 65.Kc6-d5 Bf2-c5 66.Re7-h7 Bc5-e3 67.Kd5-c4 Ka8-b8 68.Rh7-f7 Kb8-c8 69.Rf7-g7 Be3-f2 70.Rg7-f7 Bf2-e3
+- (3.87) Depth: 47/47 00:05:04 150394kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-d4 60.Re8-e7+ Kb7-c8 61.Re7-h7 Bd4-e3 62.Kb5-c6 Kc8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-e7 Be3-f2 65.Re7-c7 Ka8-b8 66.Rc7-b7+ Kb8-c8 67.Rb7-f7 Bf2-c5 68.Rf7-b7 Kc8-d8 69.Rb7-b8+ Kd8-e7 70.Rb8xb6
+- (3.87) Depth: 48/47 00:05:55 186677kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-d4 60.Re8-e7+ Kb7-c8 61.Re7-h7 Bd4-e3 62.Kb5-c6 Kc8-b8 63.Rh7-b7+ Kb8-a8 64.Rb7-e7 Be3-f2 65.Re7-f7 Bf2-e3 66.Rf7-c7 Ka8-b8 67.Rc7-b7+
+- (3.87) Depth: 49/47 00:07:49 264730kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-d4 60.Re8-e7+ Kb7-b8 61.Kb5-c6 Kb8-a8 62.Re7-d7 Bd4-f2 63.Rd7-f7 Bf2-e3 64.Rf7-e7 Be3-g5 65.Re7-e6 Ka8-a7 66.Kc6-b5 Bg5-d8 67.Re6-g6 Ka7-b7 68.Rg6-g7+ Bd8-c7 69.Rg7-h7 Kb7-c8 70.Kb5-c6
+- (3.87) Depth: 50/47 00:09:00 319120kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-d4 60.Re8-e7+ Kb7-b8 61.Kb5-c6 Kb8-a8 62.Re7-d7 Bd4-e3 63.Kc6-d5 Ka8-b8 64.Rd7-g7 Be3-f2 65.Kd5-c6 Bf2-e3 66.Rg7-e7 Be3-d4 67.Re7-b7+ Kb8-a8 68.Rb7-d7
+- (3.87) Depth: 51/47 00:10:00 359079kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-d4 60.Re8-e7+ Kb7-b8 61.Kb5-c6 Kb8-a8 62.Re7-d7 Bd4-e3 63.Rd7-h7 Ka8-b8 64.Rh7-b7+ Kb8-c8 65.Rb7-e7 Be3-g5 66.Re7-c7+ Kc8-b8 67.Rc7-b7+ Kb8-c8 68.Kc6xb6 Bg5-e3+ 69.Kb6-c6 Be3-d4 70.Rb7-f7 Kc8-b8 71.Rf7-d7 Bd4-e3
+- (3.87) Depth: 52/47 00:11:16 419685kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-f2 60.Re8-e7+ Kb7-c8 61.Kb5-c6 Kc8-b8 62.Re7-b7+ Kb8-a8 63.Rb7-f7 Bf2-g1 64.Rf7-c7 Bg1-d4 65.Kc6-d5 Ka8-b8 66.Rc7-e7 Bd4-c5 67.Re7-g7 Bc5-f2 68.Rg7-h7 Bf2-e3 69.Kd5-c6 Be3-g1 70.Rh7-b7+ Kb8-a8 71.Rb7-e7 Ka8-b8
+- (3.87) Depth: 53/47 00:12:40 489211kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-f2 60.Re8-e7+ Kb7-c8 61.Kb5-c6 Kc8-b8 62.Re7-b7+ Kb8-a8 63.Rb7-f7 Bf2-g1 64.Rf7-c7 Bg1-d4 65.Kc6-d5 Ka8-b8 66.Rc7-e7 Bd4-c5 67.Re7-g7 Bc5-f2 68.Rg7-f7 Bf2-g1 69.Kd5-c6 Kb8-a8
+- (3.87) Depth: 54/47 00:14:10 559461kN
56.Rg6-g4 Bd4-f2 57.Rg4-g2 Bf2-e3 58.Rg2-g8 Kc7-b7 59.Rg8-e8 Be3-g1 60.Re8-e1 Bg1-f2 61.Re1-e7+ Kb7-c8 62.Kb5-c6 Kc8-b8 63.Re7-b7+ Kb8-a8 64.Rb7-f7 Bf2-e3 65.Rf7-h7 Be3-f2 66.Kc6-b5 Bf2-e3 67.Rh7-f7 Ka8-b8 68.Rf7-e7 Be3-d4 69.Kb5-c6 Bd4-f2
+- (3.75) Depth: 55/47 00:17:55 738836kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-f7 Bf2-e3 60.Rf7-h7 Be3-f2 61.Rh7-e7 Bf2-d4 62.Re7-b7+ Kb8-c8 63.Rb7-c7+ Kc8-b8 64.Rc7-d7 Bd4-e3 65.Rd7-b7+ Kb8-c8 66.Rb7-e7 Be3-g5 67.Re7-e8+ Bg5-d8 68.Re8-g8 Kc8-b8 69.Rg8xd8+ Kb8-a7 70.Kc6-b5 Ka7-b7 71.a4-a5
+- (3.92) Depth: 56/47 00:22:02 925124kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-f7 Bf2-e3 60.Rf7-h7 Be3-f2 61.Rh7-e7 Bf2-d4 62.Re7-b7+ Kb8-c8 63.Rb7-f7 Kc8-b8 64.Kc6-d5 Bd4-e3 65.Rf7-g7 Kb8-c8 66.Kd5-c6 Kc8-b8 67.Rg7-b7+ Kb8-a8 68.Rb7-e7 Be3-f2 69.Re7-f7 Bf2-g1 70.Rf7-g7 Bg1-d4 71.Rg7-h7 Bd4-e3
+- (3.75) Depth: 56/47 00:25:56 1090730kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-f7 Bf2-e3 60.Rf7-h7 Be3-f2 61.Rh7-e7 Bf2-d4 62.Re7-b7+ Kb8-c8 63.Rb7-d7 Bd4-e3 64.Rd7-e7 Be3-g5 65.Re7-c7+ Kc8-b8 66.Rc7-b7+ Kb8-c8 67.Kc6xb6 Bg5-e3+ 68.Kb6-c6 Be3-d4 69.a4-a5 Bd4-e3 70.a5-a6 Kc8-d8 71.a6-a7
+- (3.75) Depth: 57/47 00:32:59 1373549kN
56.Rg6-g4 Bd4-f2 57.Rg4-g7+ Kc7-c8 58.Kb5-c6 Kc8-b8 59.Rg7-f7 Bf2-e3 60.Rf7-h7 Be3-c5 61.a4-a5 b6xa5 62.Kc6xc5 a5-a4 63.Rh7-g7 Kb8-a8 64.Kc5-c6 a4-a3 65.Kc6-d5 Ka8-b8 66.Kd5-c5 Kb8-c8 67.Rg7-f7 Kc8-d8 68.Rf7-f3 a3-a2 69.Rf3-f8+ Kd8-d7 70.Rf8-f7+ Kd7-e8 71.Rf7-a7
+- (3.75) Depth: 58/47 00:37:28 1588290kN

(, 08.01.2011)

[bob]

logically the window should not matter with respect to where you find the solution, only how long it takes. But with pruning decisions based on alpha/beta values, this changes things a bit...

Why would you want a _larger_ aspiration window? The normal idea is to make it as tight as you can get away with without causing excessive out-of-bounds failures and re-searches...

[Uri Blass]

logically the window should not matter with respect to where you find the solution, only how long it takes. But with pruning decisions based on alpha/beta values, this changes things a bit...

Why would you want a _larger_ aspiration window? The normal idea is to make it as tight as you can get away with without causing excessive out-of-bounds failures and re-searches...

The reason that I want larger aspiration window is to make the search more stable and not to have fail high and after it fail low(with a bigger window) and after it again fail high(with a bigger window) for the same move with stockfish.

I remember it from analysis and
I will try to post later an example with a diagram when something like that happens with stockfish.

[Uri Blass]

Here is an example from one of my correspondence games
analysis of move 48 with 256 mbytes hash(1 thread so it is possible to reproduce)

http://www.iccf-webchess.com/MakeAMove.aspx?id=190493

[D]6r1/1R6/4p1P1/2k2p2/1p3P2/1P2K3/8/8 w - - 0 1

Analysis by Stockfish 2.0.1 JA:
score at depth 16 0.92

fail high
± (1.01) Depth: 17/27 00:00:02 280kN
48.g6-g7 Kc5-d5 49.Rb7-d7+ Kd5-c6 50.Rd7-f7 Kc6-d5 51.Ke3-f3 Kd5-d6 52.Rf7-a7 Kd6-d5 53.Kf3-g3 e6-e5 54.Ra7-a5+ Kd5-e6 55.Ra5xe5+ Ke6-f6
bigger aspiration window
fail low
± (0.84) Depth: 17/27 00:00:02 315kN
48.g6-g7 Kc5-d5 49.Rb7-d7+ Kd5-c6 50.Rd7-a7 Kc6-d5 51.Ke3-f3 Kd5-d6 52.Ra7-a6+ Kd6-e7
bigger aspiration window
fail low
± (0.76) Depth: 17/27 00:00:02 341kN
48.g6-g7 Kc5-d5 49.Rb7-d7+ Kd5-c6 50.Rd7-a7 Kc6-d5 51.Ke3-f3 Kd5-d6 52.Ra7-f7 Kd6-d5 53.Rf7-b7 Kd5-d6 54.Rb7-a7 Kd6-d5 55.Ra7-f7 Kd5-c6 56.Rf7-e7 Kc6-d6 57.Re7-a7
bigger aspiration window get again the score of 0.92
± (0.92) Depth: 17/27 00:00:03 351kN
48.g6-g7 Kc5-d5 49.Rb7-d7+ Kd5-c6 50.Rd7-a7 Kc6-d5 51.Ke3-f3 Kd5-d6 52.Ra7-f7 Kd6-d5 53.Rf7-b7 Kd5-d6 54.Rb7-a7 Kd6-d5 55.Ra7-e7 Kd5-d6 56.Re7-a7

[bob]

logically the window should not matter with respect to where you find the solution, only how long it takes. But with pruning decisions based on alpha/beta values, this changes things a bit...

Why would you want a _larger_ aspiration window? The normal idea is to make it as tight as you can get away with without causing excessive out-of-bounds failures and re-searches...

The reason that I want larger aspiration window is to make the search more stable and not to have fail high and after it fail low(with a bigger window) and after it again fail high(with a bigger window) for the same move with stockfish.

I remember it from analysis and
I will try to post later an example with a diagram when something like that happens with stockfish.

That's a problem caused by using alpha/beta values to make pruning/reduction/evaluation decisions. Widening the window will likely make it play worse overall, as I would expect that they tested their window as carefully as I have tested mine...