For how long will Stockfish be competitive versus the best NN ?

[jp]

It was a bad choice for someone who has good hardware.

[corres]

A choice that was made BECAUSE of big hardware. Big hardware can make people do that, it's not a guarantee of better play, it just gives more options, but more often than not the extra playable options aren't better and the person playing them overestimates the complications they create.
...

I do not know what kind of chess play every each player, but in general the most of chess player seek for win and not for "better play". It is very subjective thing what is "better play" but the win of a game is rather straightforward thing, Because near every player use the same engines so using a very powerful hardware is the most important viewpoint.

[yurikvelo]

one can probably make the same conclusion with the same machine in 20 minutes by going back and forth and some intuition.

Centaur play (guide machine with your intuition) is -500 elo penalty.
You wouldn't have paid any attention to this position, if you were not informed by someone that state-of-the art engine make mistake and obviously (given this information) you would manually prune 1st move (not by intuition, but by provided information)

[zullil]

It seems to be enough to reveal that Ovyron needs better hardware.

No, one of two things are true:

- I'd have spent more than 15 minutes on the position and found that Bg5 was losing and would have avoided it. "I don't need better hardware" stands because if with faster hardware I'd have avoided it, I'd also have avoided it if I let my current hardware analyze for that long (what Dann Corbit is saying, more time = faster hardware)

- I'd have done the exact same thing I did (just, much faster) and wrongly concluded that Bg5 was drawn EVEN WITH BIGGER HARDWARE. In this case, bigger hardware would be useless to me because I wouldn't have known how to use it, as Alayan was saying on the other thread.

Anyway, good work at indeed trapping me, I just want to know if you'd feel capable of driving a game into one of these positions and making me lose live in a game, so we can arrange something. Probably to make it interesting we set some time limits for me based on the honor system, like I promise to never analyze a move for more than 1 hour, and knowing about my hardware and limited time, you drive to a position that makes me lose the game. The kind of game Zenmastur left me hungry for.

I'd be curious to know if your hardware/method would have ever discovered that Bg5 loses. And, if so, how long it would have taken you. Does knowing that Bg5 loses eliminate this position as a test of your process? Or could you carry out your process pretending that you have no prior knowledge about the position?

It wasn't really my intent to "trap" you with this. When this position was presented in another thread, it occurred to me that it might be a type of position that would make a good test.

[Jouni]

In TCEC SF hasn't won any game in the last 30 one! But score 37-34 means engines are still within 15 ELO.

[yurikvelo]

]8/1p2B3/4k3/7p/p1Pp3P/P2P1K2/8/4b3 w - - 6 51

What move(s) are "best"?

SF-Dev + Syzygy6 stick @ 51. Bg5 to D=89 (510 MTBhits)

[-0.7 .. -1.04] @ D=16 .. 83
-1.13 @ D=84 .. 88
[-1.15 .. -1.33] @ D=89

At D=89 (>510 MTBHits) SF switches to -1.15 Ke2 and recover to -0.88 @ 620 MTBHits

In self-play with D=60+ per move white loose after 51. Bg5 Ba5
[pgn]
[SetUp "1"]
[FEN "8/1p2B3/4k3/7p/p1Pp3P/P2P1K2/8/4b3 w - - 6 51"]
[PlyCount "78"]

51. Bg5 (51. Ke2 Ba5) 51. .. Ba5 52. Ke4 (52. Kg2 Bb6) 52. .. Bb6 53. Bc1 Bc5
54. Kf4 Be7 55. Kg3 Kf5 56. Bb2 Ke6 57. Bc1 Kd7 58. Bb2 Kc6 59. Bc1 b6 60.
Bb2 b5 61. cxb5+ Kxb5 62. Bc1 Kc6 63. Bb2 Kd7 64. Bc1 Ke6 65. Bb2 Kf5 66.
Bc1 Ke6 67. Kh3 Bd6 68. Kg2 Kf5 69. Kf3 Be7 70. Kg3 Bf8 71. Kf3 Bd6 72. Bb2
Bf4 73. Bxd4 Bd6 74. Bb2 Bf8 75. Bc1 Be7 76. Kg3 Bf6 77. Bd2 Bb2 78. Bb4
Be5+ 79. Kf3 Ke6 80. Bc5 Bf6 81. Kg3 Kd5 82. d4 Ke4 83. Ba7 Be7 84. Bc5 Bd8
85. Ba7 Ke3 86. Bc5 Ba5 87. Kh3 Ke4 88. Kg2 Be1 89. Be7 Kxd4 *
[/pgn]

After 51. Ke2
-0.87 51. .. Ba5 @ D=107 (>1000 MTBHits)
eval is -0.87 from D=63 to D=107

after 51. Bg5 Ba5 eval start to drop after D=85; and reach
-2.03 52. Kg2 Bb6 @ D=90 (305 MTBHits)

[zullil]

]8/1p2B3/4k3/7p/p1Pp3P/P2P1K2/8/4b3 w - - 6 51

What move(s) are "best"?

SF-Dev + Syzygy6 stick @ 51. Bg5 to D=89 (510 MTBhits)

[-0.7 .. -1.04] @ D=16 .. 83
-1.13 @ D=84 .. 88
[-1.15 .. -1.33] @ D=89

At D=89 (>510 MTBHits) SF switches to -1.15 Ke2 and recover to -0.88 @ 620 MTBHits

In self-play with D=60+ per move white loose after 51. Bg5 Ba5
[pgn]
[SetUp "1"]
[FEN "8/1p2B3/4k3/7p/p1Pp3P/P2P1K2/8/4b3 w - - 6 51"]
[PlyCount "78"]

51. Bg5 (51. Ke2 Ba5) 51. .. Ba5 52. Ke4 (52. Kg2 Bb6) 52. .. Bb6 53. Bc1 Bc5
54. Kf4 Be7 55. Kg3 Kf5 56. Bb2 Ke6 57. Bc1 Kd7 58. Bb2 Kc6 59. Bc1 b6 60.
Bb2 b5 61. cxb5+ Kxb5 62. Bc1 Kc6 63. Bb2 Kd7 64. Bc1 Ke6 65. Bb2 Kf5 66.
Bc1 Ke6 67. Kh3 Bd6 68. Kg2 Kf5 69. Kf3 Be7 70. Kg3 Bf8 71. Kf3 Bd6 72. Bb2
Bf4 73. Bxd4 Bd6 74. Bb2 Bf8 75. Bc1 Be7 76. Kg3 Bf6 77. Bd2 Bb2 78. Bb4
Be5+ 79. Kf3 Ke6 80. Bc5 Bf6 81. Kg3 Kd5 82. d4 Ke4 83. Ba7 Be7 84. Bc5 Bd8
85. Ba7 Ke3 86. Bc5 Ba5 87. Kh3 Ke4 88. Kg2 Be1 89. Be7 Kxd4 *
[/pgn]

After 51. Ke2
-0.87 51. .. Ba5 @ D=107 (>1000 MTBHits)
eval is -0.87 from D=63 to D=107

after 51. Bg5 Ba5 eval start to drop after D=85; and reach
-2.03 52. Kg2 Bb6 @ D=90 (305 MTBHits)

My Stockfish search eventually showed an evaluation of -147.xx for 51. Bg5. It certainly loses.

[Milos]

In TCEC SF hasn't won any game in the last 30 one! But score 37-34 means engines are still within 15 ELO.

Well it did win one now and difference is negligible. The winner is basically decided by shear luck and choice of openings.

[jp]

My Stockfish search eventually showed an evaluation of -147.xx for 51. Bg5. It certainly loses.

Did you keep its PV?

[Ovyron]

I'd be curious to know if your hardware/method would have ever discovered that Bg5 loses. And, if so, how long it would have taken you. Does knowing that Bg5 loses eliminate this position as a test of your process? Or could you carry out your process pretending that you have no prior knowledge about the position?

Sure. So let's say it took me 18 minutes to rule out any other alternative except for Bg5 and Ke2 (15 minutes for the analysis, 3 minutes to record it manually, which is what I lose on average.) I have Bg5 as better than Ke2, so the next thing I'd have done is firing up my engine, and check its output for the remaining candidate moves, up to Depth 47.

First 51.Bg5:

[d]8/1p6/4k3/6Bp/p1Pp3P/P2P1K2/8/4b3 b - -

28/37 0:01 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Bc1 Bd8 55.Kg3 Be7 56.Bb2 Bd6+ 57.Kg2 Ke6 58.Kf3 Ke5 59.Bc1 Be7 60.Kg3 Kf5 61.Bb2 Bf6 62.Bc1 Be5+ 63.Kf3 Bg7 64.Kg3 Bf8 (4.344.227) 3000 TB:4.490
29/38 0:01 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Bc1 Bd8 55.Kg3 Be7 56.Bb2 Bd6+ 57.Kf3 Ke6 58.Kg2 Be7 59.Kg3 Ke5 60.Bc1 Kf5 61.Bb2 Bf6 62.Bc1 Be5+ 63.Kf3 Bd6 64.Bb2 Bc5 (4.381.170) 2994 TB:4.490
30/36 0:01 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Bc1 Bd8 55.Kg3 Be7 56.Bb2 Bd6+ 57.Kf3 Ke6 58.Kg2 Be7 59.Kg3 Ke5 60.Bc1 Kf5 61.Bb2 Bf6 62.Bc1 Bg7 63.Bg5 Bf8 64.Bc1 Bd6+ (4.497.764) 2980 TB:4.694
31/38 0:01 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Bc1 Bd8 55.Kg3 Be7 56.Bb2 Bd6+ 57.Kf3 Ke6 58.Kg2 Be7 59.Kg3 Ke5 60.Bc1 Kf5 61.Bb2 Bf6 62.Bc1 Bg7 63.Bg5 Bf8 64.Bc1 Bd6+ (4.842.553) 2980 TB:5.413
32/46 0:01 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Kg2 Bc5 55.Bc1 Ke6 56.Kf3 Kf5 57.Bb2 Ke5 58.Bc1 Be7 59.Kg3 Ke6 60.Bb2 Kf5 61.Bc1 Ke5 62.Bf4+ Ke6 63.Bc1 Bf6 64.Bg5 Bg7 (5.430.733) 2962 TB:6.188
33/42 0:01 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Kg2 Bc5 55.Bc1 Ke6 56.Kf3 Kf5 57.Bb2 Ke5 58.Bc1 Ke6 59.Kf4 Kf6 60.Ke4 Kg6 61.Kf3 Be7 62.Kg3 Kf5 63.Bb2 Ke5 64.Bc1 Ke6 (5.770.502) 2951 TB:6.782
34/49 0:02 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Kg2 Bc5 55.Bc1 Ke6 56.Kf3 Kf5 57.Bb2 Ke5 58.Bc1 Be7 59.Kg3 Kf5 60.Bb2 Bf6 61.Bc1 Ke6 62.Bg5 Be5+ 63.Kf3 Bd6 64.Bc1 Kf5 (6.360.554) 2924 TB:9.194
35/37 0:02 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Kg2 Bc5 55.Bc1 Ke6 56.Kf3 Kf5 57.Bb2 Ke5 58.Bc1 Be7 59.Kg3 Ke6 60.Bb2 Kf5 61.Bc1 Bf6 62.Bb2 Be5+ 63.Kf3 Bg7 64.Bc1 Bf8 (6.734.682) 2940 TB:9.767
36/46 0:02 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Kg2 Bc5 55.Bc1 Ke6 56.Kf3 Kf5 57.Kg3 Bb6 58.Bb2 Bc7+ 59.Kf3 Bd8 60.Kg3 Be7 61.Bc1 Bf6 62.Bd2 Be5+ 63.Kf3 Bd6 64.Bc1 Bf8 (7.597.044) 2986 TB:11.413
37/47 0:03 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Kg2 Bc5 55.Bc1 Ke6 56.Kf3 Kf5 57.Kg3 Be7 58.Bb2 Bf6 59.Bc1 Be5+ 60.Kf3 Bd6 61.Bb2 Ke5 62.Kg3 Ke6+ 63.Kf3 Kf5 64.Bc1 Be7 (9.069.205) 2925 TB:16.976
38/44 0:05 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Kg2 Bc5 55.Bc1 Ke6 56.Kf3 Kf5 57.Bb2 Bd6 58.Bc1 Kg6 59.Bb2 Be7 60.Kg3 Bf6 61.Bc1 Kf7 62.Bf4 Be7 63.Bc1 Ke6 64.Bb2 Ke5 (13.972.897) 2741 TB:42.475
39/48 0:05 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Kg2 Bc5 55.Bc1 Ke6 56.Kf3 Be7 57.Kg3 Kf7 58.Bb2 Bd6+ 59.Kf3 Ke6 60.Bc1 Kf5 61.Bb2 Be7 62.Kg3 Bf6 63.Bc1 Be5+ 64.Kf3 Bg7 (14.618.843) 2751 TB:45.024
40/48 0:05 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Kg2 Bc5 55.Bc1 Ke6 56.Kf3 Be7 57.Kg3 Kf5 58.Bb2 Ke5 59.Bc1 Ke6 60.Bb2 Bf6 61.Bc1 Kf5 62.Bd2 Be7 63.Bc1 Bc5 64.Bb2 Ke5 (15.547.045) 2763 TB:49.159
41/53 0:06 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Kg2 Bc5 55.Bc1 Ke6 56.Kf3 Be7 57.Kg3 Kf5 58.Bb2 Ke5 59.Bc1 Bc5 60.Kf3 Ke6 61.Bb2 Be7 62.Kg3 Kf5 63.Bc1 Bf6 64.Bd2 Be5+ (17.021.704) 2773 TB:51.123
42/50 0:07 -0.82 51...Ba5 52.Kg2 Bb6 53.Kf3 Kf7 54.Kg2 Bc5 55.Bc1 Ke6 56.Kf3 Be7 57.Kg3 Kf5 58.Bb2 Ke5 59.Bc1 Bc5 60.Kf3 Ke6 61.Bb2 Be7 62.Kg3 Bf6 63.Bc1 Be5+ 64.Kf3 Bc7 (19.578.456) 2777 TB:60.365
43/61 0:09 -0.82 51...Ba5 52.Kg2 Bb6 53.Bh6 Bc5 54.Bc1 Kf5 55.Kf3 Be7 56.Kg3 Bf6 57.Bd2 Be5+ 58.Kf3 Bd6 59.Bc1 Bc5 60.Bb2 Kg6 61.Kf4 Bf8 62.Kg3 Bd6+ 63.Kf3 Be7 64.Kg3 Bf6 (25.887.544) 2780 TB:83.048
44/55 0:11 -0.92++ 51...Ba5 (33.365.637) 2820 TB:106.121
44/56 0:12 -0.92 51...Ba5 52.Kg2 Bb6 53.Bh6 Bc5 54.Bc1 Kf5 55.Kf3 Be7 56.Kg3 Ke6 57.Bb2 Kd7 58.Bc1 Kc6 59.Bb2 Kc5 60.Bc1 Kb6 61.Bb2 Kc6 62.Kh3 Bd6 63.Kg2 Kd7 64.Kf3 Ke6 (36.910.856) 2856 TB:114.165
45/58 0:16 -0.82-- 51...Ba5 52.Kg2 (48.306.843) 2924 TB:139.019
45/59 0:18 -0.92++ 51...Ba5 (53.538.623) 2916 TB:147.469
45/59 0:18 -0.92 51...Ba5 52.Kg2 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Bb2 Kc6 57.Kh3 Bd6 58.Kg2 b5 59.cxb5+ Kxb5 60.Bc1 Be7 61.Kg3 Kc6 62.Bb2 Kc5 63.Kh3 Bd6 64.Kg2 Kd5 (54.297.926) 2913 TB:148.994
46/54 0:20 -0.92 51...Ba5 52.Kg2 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Bb2 Kc6 57.Kh3 Bd6 58.Kg2 b5 59.cxb5+ Kxb5 60.Bc1 Be7 61.Kg3 Kc6 62.Bb2 Kc5 63.Kh3 Bd6 64.Kg2 Kd5 (60.793.490) 2935 TB:168.027
47/57 0:26 -0.91 51...Ba5 52.Kg2 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Bb2 Kc6 57.Kh3 Bd6 58.Kg2 b5 59.cxb5+ Kxb5 60.Bc1 Be7 61.Kg3 Kc6 62.Bb2 Kc5 63.Kh3 Bd6 64.Kg2 Kd5 (77.702.575) 2975 TB:230.365

Then for 50.Ke2...

[d]8/1p2B3/4k3/7p/p1Pp3P/P2P4/4K3/4b3 b - -

20/48 0:00 -0.20 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Bd6+ 56.Kg2 Ke5 57.Kg3 Kf5+ 58.Kf3 Be7 59.Kg3 Ke6 60.Bb2 Kd7 61.Bc1 Bd6+ 62.Kf3 Kc6 63.Kg2 Be7 64.Kh3 Kc5 (667.735) 1799 TB:249
21/33 0:00 -0.09 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Bb2 Bf6 58.Bc1 Bd8 59.Kg3 Be7 60.Kh3 Kd7 61.Kg3 Bd6+ 62.Kf3 Kc6 63.Kg2 Kc5 64.Kh3 (801.082) 1884 TB:266
22/35 0:00 -0.09 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Bb2 Bf6 58.Bc1 Be5 59.Kg2 Bd6 60.Kh3 Kc7 61.Kg2 Kd7 62.Kf3 Kc6 63.Kg2 Be7 64.Kh3 b6 (890.873) 1750 TB:293
23/30 0:00 -0.09 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Bb2 Bf6 58.Bc1 Be5 59.Kg2 Bd6 60.Kh3 Kc7 61.Kg2 Kd7 62.Kf3 Be7 63.Kg3 Kc6 64.Kh3 Bd6 (945.393) 1790 TB:299
24/36 0:00 -0.09 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Bb2 Bf6 58.Bc1 Be5 59.Kg2 Bd6 60.Kh3 Kc7 61.Kg2 Kd7 62.Kf3 Be7 63.Kg3 Kc6 64.Kh3 b5 (1.015.696) 1676 TB:336
25/32 0:00 -0.09 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Bb2 Bf6 58.Bc1 Be5 59.Kg2 Bd6 60.Kh3 Kc7 61.Kg2 Kd7 62.Kh3 Ke7 63.Kg2 Ke6 64.Bb2 Be7 (1.115.378) 1697 TB:375
26/37 0:00 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Bb2 Bf6 58.Bc1 Be5 59.Kg2 Bd6 60.Kh3 Kc7 61.Kg2 Kd7 62.Kh3 Be7 63.Bb2 Kc6 64.Bc1 b6 (1.526.250) 1653 TB:645
27/31 0:00 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Bb2 Bf6 58.Bc1 Be5 59.Kg2 Bd6 60.Kh3 Kc7 61.Kg2 Kd7 62.Bb2 Be7 63.Kh3 b6 64.Bc1 Kc6 (1.632.586) 1681 TB:776
28/34 0:01 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Bb2 Bf6 58.Bc1 Be5 59.Kg2 Bd6 60.Kh3 Kc7 61.Kg2 Kd7 62.Bb2 Be7 63.Kh3 b6 64.Bc1 Kc6 (1.974.673) 1739 TB:1.072
29/37 0:01 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Bb2 Bf6 58.Bc1 Be5 59.Kg2 Bd6 60.Kh3 Kc7 61.Kg2 Kd7 62.Bb2 Be7 63.Kh3 b6 64.Bc1 Kc6 (2.113.246) 1775 TB:1.205
30/36 0:01 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Bb2 Bf6 58.Bc1 Be5 59.Kg2 Bd6 60.Kh3 Kc7 61.Kg2 Kd7 62.Bb2 Be7 63.Kg3 b6 64.Bc1 Kc6 (2.382.833) 1845 TB:1.441
31/40 0:01 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Bb2 Kc6 57.Bc1 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Kg3 Kxb5 61.Bb2 Bd6+ 62.Kf3 Kc6 63.Bc1 Be7 64.Kg3 Kb6 (2.847.203) 1886 TB:1.880
32/40 0:02 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Kg3 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Kg3 Kxb5 61.Bb2 Bd6+ 62.Kf3 Kc6 63.Bc1 Be7 64.Kg3 Kb6 (4.211.204) 1873 TB:3.824
33/46 0:02 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Kg3 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Kg3 Kxb5 61.Bb2 Bd6+ 62.Kf3 Kc6 63.Bc1 Be7 64.Kg3 Kb6 (4.275.656) 1881 TB:3.930
34/45 0:02 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Kg3 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Kg3 Kxb5 61.Bb2 Bd6+ 62.Kf3 Kc6 63.Bc1 Be7 64.Kg3 Kb6 (4.833.274) 1851 TB:5.749
35/45 0:03 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Kg3 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Kg3 Kxb5 61.Bb2 Bd6+ 62.Kf3 Kc6 63.Bc1 Be7 64.Kg3 Kb6 (5.847.831) 1883 TB:7.410
36/44 0:03 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Kg3 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Kg3 Kxb5 61.Bb2 Bd6+ 62.Kf3 Kc6 63.Bc1 Be7 64.Kg3 Kb6 (6.191.614) 1927 TB:7.797
37/45 0:03 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Kg3 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Kg3 Kxb5 61.Bb2 Bd6+ 62.Kf3 Kc6 63.Bc1 Be7 64.Kg3 Kb6 (6.508.961) 1950 TB:8.203
38/49 0:03 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 Kc6 57.Kg3 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Kg3 Kxb5 61.Bb2 Bd6+ 62.Kf3 Kc6 63.Bc1 Be7 64.Kg3 Kb6 (7.211.037) 1940 TB:10.138
39/52 0:04 -0.18++ 51...Ba5 (7.801.545) 1940 TB:11.195
39/52 0:04 -0.28++ 51...Ba5 (7.979.586) 1948 TB:11.751
39/52 0:04 -0.42++ 51...Ba5 (8.422.276) 1979 TB:13.063
39/52 0:04 -0.62++ 51...Ba5 (9.229.965) 2043 TB:15.060
39/52 0:04 -0.08 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Kh3 b6 57.Bb2 Bd6 58.Kg2 Kc6 59.Bc1 b5 60.cxb5+ Kb6 61.Kh3 Kxb5 62.Kg2 Kc6 63.Kf3 Be7 64.Kg3 Kd5 (9.913.247) 2032 TB:16.482
40/49 0:04 -0.18++ 51...Ba5 (10.091.319) 2037 TB:16.551
40/54 0:05 -0.08 51...Ba5 52.Bg5 Bc7 53.Kf3 Bb6 54.Kg3 Bc5 55.Bc1 Be7 56.Bb2 Kd7 57.Kh3 Kc6 58.Bc1 b5 59.cxb5+ Kb6 60.Bb2 Kxb5 61.Bc1 Bd6 62.Kg2 Kc6 63.Kf3 Be7 64.Kg3 Kd5 (11.302.952) 2045 TB:20.658
41/48 0:06 -0.18++ 51...Ba5 (13.788.290) 1975 TB:27.908
41/48 0:07 -0.28++ 51...Ba5 (14.309.108) 1982 TB:28.409
41/48 0:07 -0.42++ 51...Ba5 (14.740.253) 1982 TB:29.071
41/61 0:07 -0.14 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Bb2 Kc6 57.Bc1 Kc5 58.Bg5 Bf8 59.Bc1 b5 60.cxb5 Kxb5 61.Kf3 Be7 62.Kg3 Kc6 63.Bb2 Kd5 64.Bc1 Bd6+ (15.560.466) 1967 TB:31.494
42/57 0:10 -0.14 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Bb2 Kc6 57.Bc1 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Bb2 Kxb5 61.Bc1 Kc6 62.Kg3 Kd5 63.Kh3 Bd6 64.Kg2 Ke5 (20.964.039) 2030 TB:47.518
43/56 0:13 -0.14 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Bb2 Kc6 57.Bc1 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Bb2 Kxb5 61.Bc1 Kc6 62.Kg3 Kd5 63.Kh3 Bd6 64.Kg2 Ke5 (27.061.494) 2059 TB:73.102
44/57 0:15 -0.14 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Bb2 Kc6 57.Bc1 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Bb2 Kxb5 61.Bc1 Kc6 62.Kg3 Kd5 63.Kh3 Bd6 64.Kg2 Ke5 (33.041.165) 2137 TB:100.079
45/56 0:17 -0.14 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Bb2 Kc6 57.Bc1 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Bb2 Kxb5 61.Bc1 Kc6 62.Kg3 Kd5 63.Kh3 Bd6 64.Kg2 Ke5 (37.705.028) 2180 TB:116.655
46/59 0:18 -0.14 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Bb2 Kc6 57.Bc1 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Bb2 Kxb5 61.Bc1 Kc6 62.Kg3 Kd5 63.Kh3 Bd6 64.Kg2 Ke5 (40.609.236) 2206 TB:129.908
47/58 0:23 -0.14 51...Ba5 52.Bg5 Bb6 53.Kf3 Bc5 54.Bc1 Be7 55.Kg3 Kd7 56.Bb2 Kc6 57.Bc1 b6 58.Kh3 b5 59.cxb5+ Kb6 60.Bb2 Kxb5 61.Bc1 Kc6 62.Kg3 Kd5 63.Kh3 Bd6 64.Kg2 Ke5 (56.845.668) 2401 TB:183.504

After this Ke2 overtakes Bg5 as main move (so I'd play Ke2 instead).

I was 49 seconds short from blundering the game.