LeelaRookOdds mistakes in the endgame

[Uri Blass]

some analysis by slowchess after backward analysis:

I think 35...g5 was the best pratical chance but lc0 played 35...Ke5 that allowed me 36.Nc6+ and when I do not need to care about pawns in both sides of the board capturing all the black pawns in order to win KBN vs K is easier.

g5 probably also leads to a shorter mate relative to Ke5.
I used only the 5 piece syzygy files and it may be interesting if somebody with the 7 piece tablebases can get better results

[d]8/N7/4pkpp/p4p2/7P/8/4B1P1/2K5 b - - 0 35

Slow64-avx2 [001]:
2/1 00:00 573,209k 0 -3.20 e6-e5 Na7-c6
3/3 00:00 1k 0 -2.92 a5-a4 Na7-b5 e6-e5
3/3 00:00 2k 0 -2.80 e6-e5 Na7-b5 e5-e4
4/3 00:00 3k 0 -2.92 e6-e5 Na7-b5 a5-a4 Kc1-b2
5/6 00:00 6k 0 -2.80 e6-e5 Na7-c6 a5-a4 Kc1-b2 e5-e4 h4-h5
6/8 00:00 10k 0 -2.84 e6-e5 Na7-c6 a5-a4 Kc1-b2 e5-e4 h4-h5 g6xh5 Be2xh5
7/11 00:00 30k 0 -2.88 e6-e5 Kc1-d2 e5-e4 Be2-d1 Kf6-e6 Bd1-b3+ Ke6-d6 Na7-c8+ Kd6-c5 Nc8-e7
8/13 00:00 55k 0 -2.84 e6-e5 Na7-c6 a5-a4 Kc1-b2 e5-e4 Kb2-a3 g6-g5 h4xg5+ h6xg5 Ka3xa4 f5-f4 Ka4-b3
9/14 00:00 86k 0 -3.08 e6-e5 Na7-c6 a5-a4 Kc1-b2 e5-e4 Kb2-a3 f5-f4 Ka3xa4 h6-h5 Ka4-b3 Kf6-f5 Nc6-e7+ Kf5-f6 Ne7xg6 Kf6xg6
10/16 00:00 118k 11,816k -3.12 e6-e5 Na7-c6 a5-a4 Kc1-b2 e5-e4 Kb2-a3 f5-f4 Ka3xa4 g6-g5 Ka4-b3 Kf6-e6 h4xg5 h6xg5
11/19 00:00 206k 10,299k -3.00 e6-e5 Be2-b5 f5-f4 Na7-c6 e5-e4 Kc1-d2 Kf6-f5 Nc6xa5 Kf5-g4 Bb5-c6 e4-e3+ Kd2-d3 Kg4xh4 Na5-c4
12/21 00:00 371k 9,280k -3.41 e6-e5 Na7-c6 a5-a4 Kc1-b2 e5-e4 Kb2-a3 g6-g5 h4xg5+ h6xg5 Ka3xa4 Kf6-e6 Ka4-b5 Ke6-d5 Be2-d1 Kd5-d6
12/21+ 00:00 387k 9,683k -3.40 a5-a4
12/22 00:00 685k 9,787k -3.36 a5-a4 Kc1-b2 Kf6-e5 Be2-c4 Ke5-f6 Kb2-a3 e6-e5 Ka3xa4 e5-e4 Na7-c6 f5-f4 Bc4-e2 Kf6-f5 Ka4-b5 g6-g5 Kb5-c4
13/22 00:00 1,038k 9,438k -3.36 a5-a4 Kc1-b2 e6-e5 Kb2-a3 e5-e4 Ka3xa4 f5-f4 Na7-c6 Kf6-e6 Ka4-b5 Ke6-d6 Be2-d1 g6-g5 h4xg5 h6xg5 Kb5-b6 Kd6-e6 Kb6-c5 Ke6-f5
13/22+ 00:00 1,041k 9,461k -3.35 e6-e5
14/22 00:00 1,245k 9,577k -3.56 a5-a4 Be2-d1 a4-a3 Na7-b5 a3-a2 Kc1-b2 e6-e5 Kb2xa2 e5-e4 Ka2-b3 f5-f4 Kb3-c3 Kf6-e5 Kc3-d2 g6-g5 h4xg5 h6xg5 Nb5-c3 Ke5-f5 Nc3xe4 Kf5xe4 Bd1-g4
14/22+ 00:00 1,248k 9,600k -3.55 e6-e5
14/22 00:00 1,277k 9,826k -3.32 e6-e5 Be2-d1 e5-e4 Na7-c6 g6-g5 Nc6xa5 Kf6-e5 h4xg5 h6xg5 Na5-c6+ Ke5-d6 Nc6-d4 f5-f4 Kc1-d2 Kd6-d5 Nd4-b5 Kd5-c5 Nb5-c3 e4-e3+ Kd2-d3 Kc5-b4 Nc3-d5+
15/24- 00:00 1,542k 9,637k -3.78 e6-e5 Be2-d1
15/24+ 00:00 1,617k 9,515k -3.77 a5-a4
15/24 00:00 1,742k 9,169k -3.68 a5-a4 Be2-d1 a4-a3 Na7-b5 a3-a2 Kc1-b2 e6-e5 Kb2xa2 e5-e4 Ka2-b3 Kf6-e5 Kb3-c3 f5-f4 Kc3-d2 g6-g5 h4-h5 Ke5-e6 Bd1-b3+ Ke6-e5 Kd2-e2 g5-g4
15/24+ 00:00 1,960k 9,332k -3.67 g6-g5
16/29- 00:00 2,784k 9,599k -4.19 a5-a4 Be2-d1
16/29+ 00:00 2,975k 9,597k -4.18 e6-e5
16/29+ 00:00 4,137k 9,850k -4.18 g6-g5
16/29 00:00 4,460k 9,912k -4.05 g6-g5 h4xg5+ h6xg5 Be2-d1 Kf6-e5 Bd1-b3 Ke5-d6 Na7-c8+ Kd6-e5 Nc8-b6 f5-f4 Nb6-c4+ Ke5-e4 Nc4xa5 e6-e5 Kc1-d2 f4-f3 g2xf3+ Ke4xf3 Na5-c4 Kf3-f4 Kd2-e2 g5-g4 Nc4-e3 g4-g3 Ne3-g2+ Kf4-e4 Bb3-c2+
17/29 00:00 4,605k 9,798k -4.05 g6-g5 h4xg5+ h6xg5 Be2-d1 Kf6-e5 Bd1-b3 Ke5-d6 Na7-c8+ Kd6-e5 Nc8-b6 f5-f4 Nb6-c4+ Ke5-e4 Nc4xa5 e6-e5 Kc1-d2 f4-f3 g2xf3+ Ke4xf3 Na5-c4 Kf3-f4 Kd2-e2 g5-g4 Nc4-e3 g4-g3 Ne3-g2+ Kf4-e4 Bb3-c2+ Ke4-d4 Ke2-f3
18/35- 00:00 7,384k 9,715k -4.61 g6-g5 h4xg5+
18/35+ 00:00 8,661k 9,624k -4.60 a5-a4
18/35 00:01 16,387k 9,583k -4.60 a5-a4 Kc1-d2 f5-f4 Na7-b5 Kf6-f5 Be2-d1 e6-e5 Bd1xa4 Kf5-g4 Nb5-d6 Kg4xh4 Ba4-c6 h6-h5 Nd6-c4 g6-g5 Nc4xe5 g5-g4 Bc6-d5 Kh4-g5 Bd5-e6 g4-g3 Ne5-f3+ Kg5-g6 Be6-d7 Kg6-f6
18/35+ 00:01 17,681k 9,506k -4.59 e6-e5
19/35- 00:03 30,027k 9,325k -5.26 a5-a4 Na7-b5
19/35+ 00:03 30,150k 9,334k -5.25 g6-g5
19/35+ 00:03 35,570k 9,385k -5.25 h6-h5
19/35 00:06 63,232k 9,312k -6.05 a5-a4 Na7-b5 Kf6-e5 Be2-d1 Ke5-f4 Bd1xa4 Kf4-g3 Nb5-d4 Kg3xh4 Nd4xe6 Kh4-g3 Ba4-c6 f5-f4 Ne6-d4 h6-h5 Nd4-e2+ Kg3-g4 Bc6-d7+ Kg4-g5 Kc1-d2 h5-h4 Kd2-d3 Kg5-f6 Ne2xf4 g6-g5 Kd3-e4 Kf6-e7 Nf4-g6+ Ke7-d6 Ng6xh4
20/35 00:08 82,973k 9,365k -6.84 a5-a4 Na7-b5 Kf6-e5 Be2-d1 Ke5-f4 Bd1xa4 Kf4-g4 Ba4-b3 Kg4xh4 Bb3xe6 f5-f4 Nb5-d4 Kh4-g5 Kc1-d2 Kg5-f6 Kd2-d3 f4-f3 g2xf3 Kf6-e5 Kd3-e3 Ke5-f6 f3-f4 h6-h5 Ke3-f3 Kf6-e7 Kf3-e4 Ke7-f6 Be6-f5 h5-h4 Bf5xg6
20/35+ 00:09 89,573k 9,399k -6.83 g6-g5
20/35+ 00:09 91,576k 9,402k -6.83 e6-e5
20/35 00:10 97,382k 9,418k -6.76 e6-e5 Kc1-d2 f5-f4 Be2-f3 Kf6-f5 Na7-b5 g6-g5 Nb5-d6+ Kf5-e6 h4xg5 h6xg5 Nd6-c4 a5-a4 Kd2-d3 Ke6-f5 Bf3-e4+ Kf5-f6 Be4-c6 a4-a3 Nc4xa3 g5-g4 Na3-c4 Kf6-e6 Kd3-e4 f4-f3 g2xf3 g4xf3 Bc6-d5+ Ke6-f6 Ke4xf3
21/36+ 00:11 104,495k 9,414k -6.07 e6-e5
21/36- 00:11 111,493k 9,361k -7.91 e6-e5 Be2-d1
21/36+ 00:12 113,134k 9,358k -7.90 a5-a4
21/36 00:13 127,084k 9,358k -7.50 a5-a4 Na7-b5 g6-g5 Be2-d1 g5xh4 Kc1-d2 e6-e5 Bd1xa4 e5-e4 Kd2-e3 Kf6-e5 Ba4-c2 f5-f4+ Ke3-f2 f4-f3 g2xf3 e4-e3+ Kf2xe3 h6-h5 f3-f4+ Ke5-f6 Ke3-f2 Kf6-g7 Nb5-d4 Kg7-f8 Bc2-e4 h4-h3 Kf2-g3
21/36+ 00:13 128,038k 9,359k -7.49 g6-g5
21/36+ 00:13 128,795k 9,353k -7.49 h6-h5
21/39- 00:14 139,051k 9,332k -7.91 a5-a4 Na7-b5
21/39+ 00:15 146,445k 9,322k -7.90 f5-f4
21/39 00:16 157,163k 9,316k -8.32 a5-a4 Na7-b5 g6-g5 Be2-d1 g5-g4 Kc1-d2 e6-e5 Bd1xa4 Kf6-e6 Ba4-d1 h6-h5 Bd1xg4 h5xg4 Kd2-e3 Ke6-d7 Nb5-c3 Kd7-e7 Nc3-d5+ Ke7-d6 h4-h5 Kd6-e6 h5-h6 Ke6-f7 Nd5-e7 f5-f4+ Ke3-e4 f4-f3 g2xf3 g4-g3 Ke4-e3 e5-e4 f3xe4 Kf7-f6 Ne7-d5+ Kf6-g5
22/41 00:20 187,037k 9,324k -9.40 a5-a4 Na7-b5 g6-g5 Be2-d1 g5-g4 Kc1-d2 Kf6-e5 Bd1xa4 Ke5-d5 Ba4-b3+ Kd5-e5 Kd2-d3 Ke5-f6 Kd3-e3 Kf6-e5 Bb3-d1 h6-h5 Bd1-b3 f5-f4+ Ke3-d3 f4-f3 g2xf3 g4-g3 Kd3-e3 g3-g2 Ke3-f2 Ke5-f5 Nb5-d4+ Kf5-g6 Bb3xe6 Kg6-f6 Kf2xg2 Kf6-e5 Nd4-b5 Ke5-f4 Be6-f7
22/41+ 00:21 199,851k 9,313k -9.39 f5-f4
22/41+ 00:22 205,523k 9,308k -9.39 e6-e5
23/41+ 00:23 217,058k 9,284k -8.28 a5-a4
23/41 00:23 217,198k 9,282k -9.41 a5-a4 Na7-b5 Kf6-e5 Be2-d1 Ke5-f4 Bd1xa4 Kf4-g4 Ba4-b3 Kg4xh4 Bb3xe6 Kh4-g3 Nb5-d4 Kg3-f4 Be6-f7 g6-g5 Bf7-g6 Kf4-e5 Nd4xf5 Ke5-f6 Nf5xh6 Kf6xg6
23/41+ 00:23 217,234k 9,284k -9.40 e6-e5
23/41+ 00:23 221,644k 9,278k -9.40 f5-f4
23/42 00:24 223,001k 9,272k -9.41 a5-a4 Na7-b5 Kf6-e5 Be2-d1 Ke5-f4 Bd1xa4 Kf4-g4 Ba4-b3 Kg4xh4 Bb3xe6 Kh4-g3 Nb5-d4 Kg3-f4 Be6-f7 g6-g5 Bf7-g6 Kf4-e5 Nd4xf5 Ke5-f6 Nf5xh6 Kf6xg6
24/48 00:32 293,130k 9,152k -9.72 a5-a4 Na7-b5 Kf6-e5 Be2-d1 Ke5-f4 Bd1xa4 Kf4-g4 Ba4-b3 Kg4xh4 Bb3xe6 Kh4-g3 Nb5-d4 Kg3xg2 Be6-f7 g6-g5 Nd4xf5 Kg2-f3 Nf5xh6 g5-g4
24/48+ 00:32 296,738k 9,139k -9.71 f5-f4
24/48 00:33 301,627k 9,129k -9.43 f5-f4 Be2-d1 g6-g5 h4xg5+ h6xg5 Na7-c6 Kf6-f5 Nc6xa5 g5-g4 Na5-c6 f4-f3 Nc6-d4+ Kf5-f4 Nd4xf3 g4xf3 Bd1xf3 Kf4-e3 Kc1-c2 e6-e5
24/48+ 00:33 302,639k 9,127k -9.42 h6-h5
25/48 00:35 322,717k 9,080k -9.43 f5-f4 Be2-d1 g6-g5 h4xg5+ h6xg5 Na7-c6 Kf6-f5 Nc6xa5 g5-g4 Na5-c6 f4-f3 Nc6-d4+ Kf5-f4 Nd4xf3 g4xf3 Bd1xf3 e6-e5
26/48 00:39 356,548k 8,936k -9.72 f5-f4 Be2-d1 g6-g5 h4xg5+ h6xg5 Na7-c6 Kf6-f5 Nc6xa5 g5-g4 Na5-c6 f4-f3 Nc6-d4+ Kf5-f4 Nd4xe6+ Kf4-e3 g2xf3 g4xf3
27/48- 01:11 617,594k 8,615k -11.84 f5-f4 Be2-d1
27/48+ 01:16 662,090k 8,639k -11.83 a5-a4
27/50- 01:35 834,417k 8,744k -16.08 f5-f4 Be2-d1
27/50+ 01:38 861,658k 8,755k -16.07 a5-a4
27/53- 02:29 1,259,578k 8,424k -24.56 f5-f4 Be2-d1
27/53+ 02:29 1,259,583k 8,424k -24.55 a5-a4
27/53+ 02:30 1,266,016k 8,419k -13.13 a5-a4
27/53 02:40 1,344,862k 8,380k -20.08 a5-a4 Na7-b5 Kf6-e5 Be2-d1 Ke5-d5 Bd1xa4 Kd5-c5 Kc1-d2 f5-f4 Kd2-d3 f4-f3 g2xf3 Kc5-b4 Kd3-e4 e6-e5 Nb5-d6 Kb4xa4 Ke4xe5 Ka4-b4 Ke5-f6 h6-h5 Kf6xg6 Kb4-c3 Kg6xh5 Kc3-d3 Nd6-c4 Kd3-d4 Kh5-g5 Kd4-c3 Kg5-g6 Kc3-d4 h4-h5 Kd4-c5 h5-h6 Kc5-c6 h6-h7 Kc6-b7 h7-h8Q Kb7-a6 Qh8-f6+ Ka6-b7 Qf6-b6+ Kb7-c8
27/53- 02:41 1,355,773k 8,382k -24.56 a5-a4 Na7-b5
27/53- 03:01 1,504,176k 8,294k -M145 a5-a4 Na7-b5
27/53+ 03:01 1,507,296k 8,288k -95.00 f5-f4
27/54+ 03:14 1,590,239k 8,177k -M250 a5-a4
28/54 03:15 1,595,134k 8,170k -19.64 a5-a4 Na7-b5 Kf6-e5 Be2-d1 Ke5-f4 Bd1xa4 Kf4-g4 Ba4-b3 Kg4xh4 Bb3xe6 Kh4-g3 Nb5-d4 f5-f4 Be6-d5 Kg3-f2 Kc1-d2 h6-h5 Nd4-e6 Kf2-g3 Bd5-e4 h5-h4 Kd2-d3 f4-f3 g2xf3 h4-h3 Kd3-e3 h3-h2 f3-f4 Kg3-g4 Ke3-f2 Kg4-h4 Kf2-g2 h2-h1Q+ Kg2xh1 Kh4-g3 Be4xg6 Kg3-f3 f4-f5 Kf3-e4 f5-f6+ Ke4-d5 f6-f7 Kd5xe6 f7-f8Q Ke6-d5
29/54- 03:15 1,595,134k 8,170k -M146 a5-a4
29/58+ 03:16 1,600,716k 8,159k -M250 a5-a4
30/58 03:16 1,604,975k 8,152k -20.00 a5-a4 Na7-b5 Kf6-e5 Be2-d1 Ke5-f4 Bd1xa4 Kf4-g4 Ba4-b3 Kg4xh4 Bb3xe6 Kh4-g3 Nb5-d4 f5-f4 Be6-d5 Kg3-f2 Kc1-d2 h6-h5 Nd4-e6 Kf2-g3 Bd5-e4 h5-h4 Kd2-d3 f4-f3 g2xf3 h4-h3 Kd3-e3 h3-h2 f3-f4 Kg3-g4 Ke3-f2 Kg4-h4 Kf2-g2 h2-h1Q+ Kg2xh1 Kh4-g3 Be4xg6 Kg3-f3 f4-f5 Kf3-e4 f5-f6+ Ke4-d5 f6-f7 Kd5xe6 f7-f8Q Ke6-d5 Kh1-g2 Kd5-e5 Qf8-d8 Ke5-e6 Bg6-e4 Ke6-f7 Be4-d5+ Kf7-g6 Kg2-g3
31/58- 03:16 1,604,997k 8,153k -28.24 a5-a4 Na7-b5
31/61- 03:16 1,605,658k 8,151k -M146 a5-a4 Na7-b5
31/64+ 03:26 1,671,988k 8,078k -M250 a5-a4
32/65 04:49 2,193,657k 7,579k -M49 a5-a4 Na7-b5 Kf6-e5 Be2-d1 Ke5-f4 Bd1xa4 Kf4-g4 Ba4-b3 Kg4xh4 Bb3xe6 Kh4-g3 Nb5-d4 Kg3xg2 Be6-f7 g6-g5 Nd4xf5 g5-g4 Nf5xh6 g4-g3 Kc1-d2 Kg2-h3 Bf7-e6+ Kh3-h4 Nh6-f5+ Kh4-g4 Nf5-e3+ Kg4-g5 Be6-d5 Kg5-f4 Ne3-c4 Kf4-g4 Bd5-g2 Kg4-f4 Kd2-e2 Kf4-g4 Ke2-e3 Kg4-g5 Ke3-f3 Kg5-h4 Kf3-f4 Kh4-h5 Kf4xg3 Kh5-h6 Kg3-f4 Kh6-g6 Bg2-e4+ Kg6-f6 Nc4-e3 Kf6-g7 Be4-d5 Kg7-g6 Kf4-e5 Kg6-g7 Ne3-f5+ Kg7-g6 Bd5-e6 Kg6-h7 Ke5-f6 Kh7-h8 Nf5-h4
32/65+ 04:58 2,249,707k 7,533k -M50 f5-f4
32/65 05:41 2,505,603k 7,328k -M50 f5-f4 Be2-d1 g6-g5 h4xg5+ h6xg5 Na7-c6 Kf6-f5 Nc6xa5 g5-g4 Kc1-d2 Kf5-g5 Kd2-d3 f4-f3 g2xf3 g4-g3 Kd3-e3 Kg5-h4 f3-f4 g3-g2 Ke3-f2 Kh4-h3 Bd1-f3 g2-g1Q+ Kf2xg1 Kh3-g3 Bf3-d5 Kg3xf4 Bd5xe6 Kf4-e5 Be6-h3 Ke5-d6 Kg1-f2 Kd6-c5 Bh3-e6 Kc5-d6 Be6-g4 Kd6-d5 Kf2-e3 Kd5-c5 Bg4-e6 Kc5-d6 Be6-h3 Kd6-d5 Na5-b3 Kd5-e5 Nb3-d4 Ke5-f6 Ke3-e4 Kf6-g6 Ke4-e5 Kg6-f7 Bh3-f5 Kf7-g7 Bf5-e6
32/65+ 05:47 2,540,064k 7,301k -M51 h6-h5
32/65+ 06:44 2,880,083k 7,120k -M51 g6-g5
33/68 08:44 3,620,044k 6,908k -M45 f5-f4 Be2-d1 f4-f3 g2xf3 h6-h5 Na7-c6 g6-g5 h4xg5+ Kf6xg5 Kc1-d2 e6-e5 Nc6xa5 h5-h4 Kd2-e3 h4-h3 Ke3-f2 Kg5-f4 Na5-c6 h3-h2 Kf2-g2 e5-e4 f3xe4 h2-h1Q+ Kg2xh1 Kf4xe4 Kh1-g2 Ke4-d5 Bd1-f3+ Kd5-e6 Kg2-g3 Ke6-d6 Kg3-f4 Kd6-c5 Nc6-e5 Kc5-d4 Ne5-g4 Kd4-c4 Ng4-e3+ Kc4-d4 Bf3-e2 Kd4-c3 Kf4-e4 Kc3-b3 Be2-c4+ Kb3-c3 Ke4-e5 Kc3-b2 Ke5-d4 Kb2-b1 Kd4-c3 Kb1-c1 Ne3-c2 Kc1-b1 Bc4-d5 Kb1-c1 Bd5-a2 Kc1-d1 Nc2-d4 Kd1-e1 Kc3-d3
33/68+ 08:44 3,620,061k 6,908k -M46 a5-a4
33/68 08:45 3,626,473k 6,907k -M47 a5-a4 Na7-b5 Kf6-e5 Be2-d1 Ke5-f4 Bd1xa4 Kf4-g3 Nb5-d4 Kg3xg2 Nd4xe6 Kg2-f3 Ba4-e8 g6-g5 h4xg5 h6xg5 Ne6xg5+ Kf3-f4 Ng5-f7 Kf4-e3 Be8-c6 f5-f4 Nf7-e5 f4-f3 Ne5-g4+ Ke3-f4 Bc6-d7 Kf4-g3 Kc1-d2 f3-f2 Kd2-e2 f2-f1Q+ Ke2xf1 Kg3-f4 Bd7-e6 Kf4-f3 Kf1-e1 Kf3-e4 Ke1-e2 Ke4-d4 Ke2-f3 Kd4-d3 Kf3-f4 Kd3-c3 Ng4-e3 Kc3-d3 Be6-d5 Kd3-d4 Bd5-c4 Kd4-c3 Kf4-e4 Kc3-b2 Ke4-d3 Kb2-b1 Kd3-c3 Kb1-a1 Ne3-c2+ Ka1-b1 Bc4-e6 Kb1-c1 Be6-a2 Kc1-d1 Nc2-d4 Kd1-e1
33/68+ 08:45 3,626,474k 6,907k -M48 g6-g5
33/68 08:54 3,681,855k 6,894k -M49 g6-g5 h4xg5+ Kf6xg5 Na7-c6 a5-a4 Kc1-b2 Kg5-f4 Kb2-a3 Kf4-g3 Be2-f3 Kg3-f4 Ka3xa4 e6-e5 Nc6-e7 e5-e4 Bf3-e2 Kf4-e3 Be2-h5 Ke3-f4 Ka4-b3 Kf4-g5 Bh5-e2 f5-f4 Kb3-c4 f4-f3 g2xf3 e4xf3 Be2xf3 Kg5-f4 Bf3-g2 h6-h5 Kc4-d4 h5-h4 Ne7-c6 Kf4-g3 Bg2-e4 Kg3-f4 Nc6-e5 Kf4-g5 Be4-g2 Kg5-f5 Bg2-h3+ Kf5-f4 Bh3-d7 h4-h3 Bd7xh3 Kf4-g5 Kd4-e4 Kg5-f6 Bh3-f5 Kf6-e7 Ne5-g6+ Ke7-f6 Ke4-f4 Kf6-g7 Kf4-g5 Kg7-f7 Bf5-h3 Kf7-g8 Kg5-f6 Kg8-h7 Bh3-e6 Kh7-h6 Be6-g8
34/68 08:55 3,690,313k 6,892k -M49 g6-g5 h4xg5+ Kf6xg5 Na7-c6 a5-a4 Kc1-b2 Kg5-f4 Kb2-a3 Kf4-g3 Be2-f3 Kg3-f4 Ka3xa4 e6-e5 Nc6-e7 e5-e4 Bf3-e2 Kf4-e3 Be2-h5 Ke3-f4 Ka4-b3 Kf4-g5 Bh5-e2 f5-f4 Kb3-c4 f4-f3 g2xf3 e4xf3 Be2xf3 Kg5-f4 Bf3-g2 Kf4-g3 Bg2-e4 Kg3-f4 Kc4-d4 h6-h5 Ne7-c6 Kf4-g4 Kd4-e3 Kg4-g5 Nc6-d4 Kg5-f6 Ke3-f4 h5-h4 Be4-f5 h4-h3 Bf5xh3 Kf6-e7 Kf4-e5 Ke7-f7 Bh3-f5 Kf7-g7 Bf5-e6 Kg7-h7 Ke5-f6 Kh7-h6 Nd4-f3 Kh6-h7 Nf3-e5 Kh7-h8 Ne5-g6+
35/68 09:20 3,840,104k 6,854k -M48 g6-g5 h4xg5+ Kf6xg5 Na7-c6 a5-a4 Kc1-b2 Kg5-f4 Kb2-a3 Kf4-g3 Be2-f3 Kg3-f4 Ka3xa4 e6-e5 Nc6-e7 e5-e4 Bf3-e2 Kf4-e3 Be2-h5 Ke3-f4 Ka4-b3 Kf4-g5 Bh5-e2 f5-f4 Kb3-c3 f4-f3 g2xf3 e4xf3 Be2xf3 Kg5-f4 Bf3-d1 Kf4-e4 Ne7-g8 h6-h5 Bd1xh5 Ke4-e3 Ng8-h6 Ke3-f4 Nh6-f7 Kf4-f5 Kc3-d4 Kf5-f6 Kd4-e4 Kf6-e6 Nf7-e5 Ke6-f6 Bh5-g4 Kf6-e7 Ne5-g6+ Ke7-f6 Bg4-f5 Kf6-g7 Ke4-e5 Kg7-f7 Bf5-e4 Kf7-g7 Ke5-e6 Kg7-g8 Ke6-f6 Kg8-h7 Be4-d5 Kh7-h6 Bd5-g8 Kh6-h5 Ng6-e5 Kh5-h4 Bg8-d5 Kh4-g3 Ne5-d3 Kg3-g4 Kf6-g6
36/76 09:41 3,967,286k 6,825k -M47 g6-g5 h4xg5+ h6xg5 Be2-d1 Kf6-e5 Bd1-b3 Ke5-d6 Na7-c8+ Kd6-e5 Nc8-e7 Ke5-d6 Ne7-g6 f5-f4 Kc1-d2 e6-e5 Kd2-d3 g5-g4 Kd3-e4 f4-f3 g2xf3 g4xf3 Ke4xf3 Kd6-c5 Ng6xe5 Kc5-b5 Ne5-d3 Kb5-c6 Bb3-a4+ Kc6-d5 Kf3-e3 Kd5-c4 Ba4-c6 Kc4-c3 Bc6-d5 Kc3-c2 Ke3-d4 a5-a4 Bd5-e6 Kc2-d2 Nd3-b2 a4-a3 Nb2-c4+ Kd2-e2 Nc4xa3 Ke2-f3 Na3-c4 Kf3-f4 Nc4-e3 Kf4-g5 Kd4-e5 Kg5-g6 Ne3-f5 Kg6-h7 Ke5-f6 Kh7-h8 Nf5-h4 Kh8-h7 Nh4-g6 Kh7-h6 Be6-g8 Kh6-h5 Ng6-e5 Kh5-h4 Bg8-d5 Kh4-g3 Ne5-d3 Kg3-g4 Kf6-g6 Kg4-h4 Bd5-f3 Kh4-g3 Bf3-d1 Kg3-h4 Bd1-e2 Kh4-g3 Kg6-g5 Kg3-h3 Be2-h5
37/76 09:41 3,970,660k 6,825k -M47 g6-g5 h4xg5+ h6xg5 Be2-d1 Kf6-e5 Bd1-b3 Ke5-d6 Na7-c8+ Kd6-e5 Nc8-e7 Ke5-d6 Ne7-g6 f5-f4 Kc1-d2 e6-e5 Kd2-d3 g5-g4 Kd3-e4 f4-f3 g2xf3 g4xf3 Ke4xf3 Kd6-c5 Ng6xe5 Kc5-b5 Ne5-d3 Kb5-c6 Bb3-a4+ Kc6-d5 Kf3-e3 Kd5-c4 Ba4-c6 Kc4-c3 Bc6-d5 Kc3-c2 Ke3-d4 a5-a4 Bd5-e6 Kc2-d2 Nd3-b2 a4-a3 Nb2-c4+ Kd2-e2 Nc4xa3 Ke2-f3 Na3-c4 Kf3-f4 Nc4-e3 Kf4-g5 Kd4-e5 Kg5-g6 Ne3-f5 Kg6-h7 Ke5-f6 Kh7-h8 Nf5-h4 Kh8-h7 Nh4-g6 Kh7-h6 Be6-g8 Kh6-h5 Ng6-e5 Kh5-h4 Bg8-d5 Kh4-g3 Ne5-d3 Kg3-g4 Kf6-g6 Kg4-h4 Bd5-f3 Kh4-g3 Bf3-d1 Kg3-h4 Bd1-e2 Kh4-g3 Kg6-g5
38/78 09:54 4,050,352k 6,810k -M47 g6-g5 h4xg5+ h6xg5 Be2-d1 Kf6-e5 Bd1-b3 Ke5-d6 Na7-c8+ Kd6-e5 Nc8-e7 Ke5-d6 Ne7-g6 f5-f4 Kc1-d2 e6-e5 Kd2-d3 g5-g4 Kd3-e4 f4-f3 g2xf3 g4xf3 Ke4xf3 Kd6-c5 Ng6xe5 Kc5-b5 Ne5-d3 Kb5-c6 Bb3-a4+ Kc6-d5 Kf3-e3 Kd5-c4 Ba4-c6 Kc4-c3 Bc6-d5 Kc3-c2 Ke3-d4 a5-a4 Bd5-e6 Kc2-d2 Nd3-b2 a4-a3 Nb2-c4+ Kd2-e2 Nc4xa3 Ke2-f3 Na3-c4 Kf3-f4 Nc4-e3 Kf4-g5 Kd4-e5 Kg5-g6 Ne3-f5 Kg6-h7 Ke5-f6 Kh7-h8 Nf5-h4 Kh8-h7 Nh4-g6 Kh7-h6 Be6-g8 Kh6-h5 Ng6-e5 Kh5-h4 Bg8-d5 Kh4-g3 Ne5-d3 Kg3-g4 Kf6-g6 Kg4-h4 Bd5-f3 Kh4-g3 Bf3-d1 Kg3-h4 Bd1-e2 Kh4-g3 Kg6-g5 Kg3-h3 Be2-h5 Kh3-g2 Kg5-h4
39/80 10:54 4,418,092k 6,748k -M47 g6-g5 h4xg5+ h6xg5 Be2-d1 Kf6-e5 Bd1-b3 Ke5-d6 Na7-c8+ Kd6-e5 Nc8-e7 Ke5-d6 Ne7-g6 f5-f4 Kc1-d2 e6-e5 Kd2-d3 g5-g4 Kd3-e4 f4-f3 g2xf3 g4xf3 Ke4xf3 Kd6-c5 Ng6xe5 Kc5-b5 Ne5-d3 Kb5-c6 Bb3-a4+ Kc6-d5 Kf3-e3 Kd5-c4 Ba4-c6 Kc4-c3 Bc6-d5 Kc3-c2 Ke3-d4 a5-a4 Bd5-e6 Kc2-d2 Nd3-b2 a4-a3 Nb2-c4+ Kd2-e2 Nc4xa3 Ke2-f3 Na3-c4 Kf3-f4 Nc4-e3 Kf4-g5 Kd4-e5 Kg5-g6 Ne3-f5 Kg6-h7 Ke5-f6 Kh7-h8 Nf5-h4 Kh8-h7 Nh4-g6 Kh7-h6 Be6-g8 Kh6-h5 Ng6-e5 Kh5-h4 Bg8-d5 Kh4-g3 Ne5-d3 Kg3-g4 Kf6-g6 Kg4-h4 Bd5-f3 Kh4-g3 Bf3-d1 Kg3-h4 Bd1-e2 Kh4-g3 Kg6-g5 Kg3-h3 Be2-h5 Kh3-g2 Kg5-h4 Kg2-h2
40/86 15:03 6,016,196k 6,657k -M47 g6-g5 h4xg5+ Kf6xg5 Na7-c6 a5-a4 Kc1-b2 Kg5-f4 Kb2-a3 Kf4-g3 Be2-f3 Kg3-f4 Ka3xa4 e6-e5 Bf3-h5 e5-e4 Nc6-d4 Kf4-e5 Nd4-e2 f5-f4 Ka4-b4 Ke5-f5 Ne2-d4+ Kf5-g5 Bh5-e8 Kg5-g4 Be8-c6 f4-f3 g2xf3+ e4xf3 Nd4xf3 Kg4-g3 Kb4-c4 Kg3-g4 Kc4-d4 Kg4-f4 Nf3-e5 Kf4-f5 Bc6-d7+ Kf5-f4 Ne5-d3+ Kf4-f3 Bd7-c6+ Kf3-e2 Nd3-f4+ Ke2-f2 Kd4-e4 h6-h5 Bc6-d7 Kf2-g3 Bd7-f5 Kg3-h4 Ke4-e5 Kh4-g3 Nf4xh5+ Kg3-f2 Ke5-e4 Kf2-e2 Ke4-d4 Ke2-e1 Nh5-f4 Ke1-f2 Kd4-e4 Kf2-g3 Nf4-e6 Kg3-h4 Bf5-g6 Kh4-g4 Ke4-e3 Kg4-h3 Bg6-h5
41/86 16:49 6,651,913k 6,588k -M47 g6-g5 h4xg5+ Kf6xg5 Na7-c6 a5-a4 Kc1-b2 Kg5-f4 Kb2-a3 Kf4-g3 Be2-f3 Kg3-f4 Ka3xa4 e6-e5 Bf3-h5 e5-e4 Nc6-d4 Kf4-e5 Nd4-e2 f5-f4 Ka4-b4 Ke5-f5 Ne2-d4+ Kf5-g5 Bh5-e8 Kg5-g4 Be8-c6 f4-f3 g2xf3+ e4xf3 Nd4xf3 Kg4-g3 Kb4-c4 Kg3-g4 Kc4-d4 Kg4-f4 Nf3-e5 Kf4-f5 Bc6-d7+ Kf5-f4 Ne5-d3+ Kf4-f3 Bd7-c6+ Kf3-g3 Bc6-e4 Kg3-g4 Kd4-e5 h6-h5 Nd3-f4 h5-h4 Be4-g2 h4-h3 Bg2xh3+ Kg4-g5 Bh3-e6 Kg5-h6 Ke5-f6 Kh6-h7 Nf4-g6 Kh7-h6 Be6-g8 Kh6-h5 Ng6-e5 Kh5-h4 Bg8-d5 Kh4-g3 Ne5-d3 Kg3-g4 Kf6-g6 Kg4-h4 Bd5-f3 Kh4-g3 Bf3-d1 Kg3-h4 Bd1-e2 Kh4-g3 Kg6-g5 Kg3-h3 Be2-h5 Kh3-g2 Kg5-h4
42/86 20:48 8,047,078k 6,448k -M46 g6-g5 h4xg5+ h6xg5 Be2-d1 Kf6-e5 Bd1-b3 Ke5-d6 Na7-c8+ Kd6-e5 Nc8-e7 Ke5-d6 Ne7-g6 f5-f4 Kc1-d2 e6-e5 Kd2-d3 g5-g4 Kd3-e4 f4-f3 g2xf3 g4xf3 Ke4xf3 Kd6-c5 Ng6xe5 Kc5-d4 Ne5-c6+ Kd4-c5 Bb3-a4 Kc5-b6 Kf3-e4 Kb6-c5 Ke4-d3 Kc5-d5 Nc6xa5 Kd5-c5 Na5-c4 Kc5-d5 Ba4-b3 Kd5-e6 Nc4-e3+ Ke6-e5 Bb3-d5 Ke5-f6 Kd3-e4 Kf6-g6 Ke4-e5 Kg6-g7 Ne3-f5+ Kg7-g6 Bd5-e6 Kg6-h7 Ke5-f6 Kh7-h8 Nf5-h4 Kh8-h7 Nh4-g6 Kh7-h6 Be6-g8 Kh6-h5 Ng6-e5 Kh5-h4 Bg8-d5 Kh4-g3 Ne5-d3 Kg3-g4 Kf6-g6 Kg4-h4 Bd5-f3 Kh4-g3 Bf3-d1 Kg3-h4 Bd1-e2 Kh4-g3 Kg6-g5 Kg3-h3 Be2-h5 Kh3-g2 Kg5-h4 Kg2-h2 Bh5-e2 Kh2-g2 Kh4-g4
43/86 25:40 9,829,387k 6,381k -M46 g6-g5 h4xg5+ h6xg5 Be2-d1 Kf6-e5 Bd1-b3 Ke5-d6 Na7-c8+ Kd6-e5 Nc8-e7 Ke5-d6 Ne7-g6 f5-f4 Kc1-d2 e6-e5 Kd2-d3 g5-g4 Kd3-e4 f4-f3 g2xf3 g4xf3 Ke4xf3 Kd6-c5 Ng6xe5 Kc5-d4 Ne5-c6+ Kd4-c5 Bb3-a4 Kc5-b6 Kf3-e4 Kb6-c5 Ke4-d3 Kc5-d5 Nc6xa5 Kd5-c5 Na5-c4 Kc5-d5 Ba4-b3 Kd5-e6 Nc4-e3+ Ke6-e5 Bb3-d5 Ke5-f6 Kd3-e4 Kf6-g6 Ke4-e5 Kg6-g7 Ne3-f5+ Kg7-g6 Bd5-e6 Kg6-h7 Ke5-f6 Kh7-h8 Nf5-h4 Kh8-h7 Nh4-g6 Kh7-h6 Be6-g8 Kh6-h5 Ng6-e5 Kh5-h4 Bg8-d5 Kh4-g3 Ne5-d3 Kg3-g4 Kf6-g6 Kg4-h4 Bd5-f3 Kh4-g3 Bf3-d1 Kg3-h4 Bd1-e2 Kh4-g3 Kg6-g5 Kg3-h3 Be2-h5 Kh3-g2 Kg5-h4 Kg2-h2 Bh5-e2 Kh2-g2 Kh4-g4 Kg2-h1 Kg4-h3

[Uri Blass]

one move earlier was possible Kd6 and I think could give better practical chance even if it is the same number of moves to mate.
[d]8/b3k3/2N1p1pp/p4p2/7P/8/4B1P1/2K5 b - - 1 34

I do not know why Slow Prefers Kd6 and not Kf6 and I will check later but I expected in the game Kd6 and not Kf6 that does not help defending the a pawn.

Slow64-avx2 [001]:
2/2 00:00 559 0 -2.20 Ke7-d6 Nc6xa7 a5-a4
3/4 00:00 2k 0 -2.76 Ke7-d6 Nc6xa7 e6-e5 Na7-b5+ Kd6-d5
4/6 00:00 4k 0 -2.68 Ke7-d6 Nc6xa7 a5-a4 Na7-b5+ Kd6-c5 Kc1-d2
5/8 00:00 7k 0 -2.64 Ke7-d6 Nc6xa7 a5-a4 Na7-b5+ Kd6-c5 Kc1-b2 Kc5-b4
6/10 00:00 13k 0 -2.48 Ke7-d6 Nc6xa7 a5-a4 Na7-b5+ Kd6-c5 Kc1-b2 Kc5-b4 Nb5-d4 a4-a3+ Kb2-a2
7/10 00:00 22k 0 -2.48 Ke7-d6 Nc6xa7 Kd6-c5 h4-h5 g6xh5 Na7-b5 a5-a4 Kc1-d2
8/13 00:00 54k 0 -2.40 Ke7-d6 Nc6xa7 Kd6-c5 Na7-b5 e6-e5 Kc1-b2 e5-e4 h4-h5 g6xh5 Kb2-c3
9/14 00:00 75k 0 -2.40 Ke7-d6 Nc6xa7 Kd6-c5 Na7-b5 e6-e5 Nb5-c3 e5-e4 Kc1-d2 Kc5-d4 h4-h5 e4-e3+ Kd2-c2 g6xh5
10/17 00:00 146k 14,571k -2.48 Ke7-d6 Nc6xa7 Kd6-c5 h4-h5 g6xh5 Be2xh5 e6-e5 Bh5-g6 f5-f4 Bg6-f5 a5-a4 Kc1-b2 h6-h5 Kb2-a3
11/18- 00:00 247k 8,238k -2.84 Ke7-d6 Nc6xa7
11/18 00:00 278k 9,254k -2.80 Ke7-d6 Nc6xa7 Kd6-c5 Kc1-b2 g6-g5 h4xg5 h6xg5 Na7-c8 e6-e5 Nc8-e7 f5-f4 Be2-f3 a5-a4
12/18 00:00 378k 9,441k -2.76 Ke7-d6 Nc6xa7 Kd6-c5 Kc1-b2 g6-g5 h4xg5 h6xg5 Na7-c8 Kc5-b4 Nc8-e7 Kb4-c5 Be2-f3 a5-a4 Kb2-a3 g5-g4
13/20 00:00 869k 8,694k -2.80 Ke7-d6 Nc6xa7 Kd6-c5 Kc1-b2 g6-g5 h4xg5 h6xg5 Na7-c8 Kc5-b4 Nc8-e7 a5-a4 Ne7-c6+ Kb4-c5 Nc6-e5 Kc5-d4 Ne5-f7 g5-g4
14/25 00:00 1,886k 8,574k -3.12 Ke7-d6 Nc6xa7 Kd6-c5 Na7-c8 f5-f4 Nc8-e7 g6-g5 h4xg5 h6xg5 Kc1-b2 e6-e5 Be2-f3 Kc5-d6 Ne7-c6 a5-a4 Kb2-a3 g5-g4 Nc6xe5
15/25 00:00 4,193k 8,735k -3.48 Ke7-d6 Nc6xa7 g6-g5 Kc1-d2 g5xh4 Be2-d1 h4-h3 g2xh3 e6-e5 Na7-c8+ Kd6-d5 Nc8-e7+ Kd5-e6 Ne7-c6 Ke6-d5 Nc6xa5 f5-f4 Bd1-b3+ Kd5-e4 Kd2-e2 f4-f3+ Ke2-f2 h6-h5
16/29 00:01 9,500k 8,407k -3.64 Ke7-d6 Nc6xa7 e6-e5 Na7-c8+ Kd6-e6 Nc8-b6 e5-e4 Kc1-d2 f5-f4 Be2-g4+ Ke6-d6 Nb6-c4+ Kd6-c5 Nc4xa5 Kc5-b5 Na5-b3 Kb5-c4 Bg4-e6+ Kc4-b4 Be6-d5 e4-e3+ Kd2-d3 g6-g5 h4xg5
17/29 00:01 13,717k 8,117k -4.04 Ke7-d6 Nc6xa7 g6-g5 Kc1-d2 e6-e5 Na7-c8+ Kd6-d5 Nc8-e7+ Kd5-e6 Ne7-g8 g5xh4 Be2-c4+ Ke6-d6 Ng8xh6 Kd6-c5 Bc4-f7 f5-f4 Kd2-d3 a5-a4 Nh6-g4 f4-f3 g2xf3 h4-h3 Kd3-e4 Kc5-b4 Ke4xe5
18/34- 00:03 27,446k 8,072k -4.60 Ke7-d6 Nc6xa7
18/36 00:04 35,395k 8,270k -4.64 Ke7-d6 Nc6xa7 g6-g5 Be2-d1 g5xh4 Kc1-d2 f5-f4 Kd2-d3 Kd6-d5 Bd1-b3+ Kd5-e5 Na7-c6+ Ke5-f5 Nc6-d4+ Kf5-e5 Nd4-f3+ Ke5-f5 Nf3xh4+ Kf5-g4 Nh4-g6 f4-f3 g2xf3+ Kg4xf3 Kd3-d4 Kf3-g3 Bb3-d1 Kg3-f2 Ng6-f4 Kf2-e1
18/36+ 00:04 36,026k 8,263k -4.63 Ke7-d7
19/36 00:05 43,048k 8,375k -4.84 Ke7-d6 Nc6xa7 g6-g5 Be2-d1 g5xh4 Kc1-d2 f5-f4 Kd2-d3 Kd6-d5 Bd1-b3+ Kd5-c5 Kd3-e4 e6-e5 Bb3-a4 Kc5-b4 Ba4-d1 Kb4-c5 Na7-c8 f4-f3 Bd1xf3 a5-a4 Ke4xe5 a4-a3 Bf3-d5 Kc5-b4 Nc8-d6 Kb4-c5 Nd6-f7 Kc5-b4 Nf7xh6 Kb4-c3 Nh6-f5
20/38 00:07 65,986k 8,660k -5.36 Ke7-d6 Nc6xa7 g6-g5 Kc1-d2 g5xh4 Be2-d1 f5-f4 Kd2-d3 Kd6-d5 Bd1-b3+ Kd5-e5 Na7-c6+ Ke5-f5 Nc6-d4+ Kf5-e5 Nd4-f3+ Ke5-f5 Nf3xh4+ Kf5-g4 Nh4-g6 f4-f3 Ng6-e5+ Kg4-f4 Ne5xf3 e6-e5 Nf3-d2 Kf4-g3 Kd3-e4 Kg3xg2 Ke4xe5 h6-h5 Bb3-d5+ Kg2-h2 Nd2-f1+ Kh2-h3 Nf1-e3
21/41 00:10 89,131k 8,913k -5.52 Ke7-d6 Nc6xa7 g6-g5 Be2-d1 g5xh4 Kc1-d2 f5-f4 Kd2-d3 Kd6-d5 Bd1-b3+ Kd5-e5 Na7-c6+ Ke5-f5 Nc6-d4+ Kf5-e5 Nd4-f3+ Ke5-f5 Nf3xh4+ Kf5-g4 Nh4-g6 Kg4-g3 Kd3-e4 Kg3xg2 Ng6xf4+ Kg2-g3 Ke4-e5 Kg3-f2 Ke5xe6 Kf2-f3 Ke6-f5 Kf3-e3 Kf5-e5 Ke3-d2 Bb3-a4 Kd2-c3 Nf4-d5+ Kc3-b2
22/42 00:12 110,452k 9,017k -5.84 Ke7-d6 Nc6xa7 g6-g5 Be2-d1 g5xh4 Kc1-d2 Kd6-c5 Kd2-e3 Kc5-b6 Na7-c8+ Kb6-b5 Ke3-f4 Kb5-b4 Nc8-e7 Kb4-c3 Kf4-e5 Kc3-d2 Bd1-b3 Kd2-e2 Bb3xe6 f5-f4 Ke5xf4 a5-a4 Ne7-f5 h4-h3 g2xh3 Ke2-d3 Be6-d5 a4-a3 Kf4-e5 Kd3-c3 Nf5-d4
23/43- 00:21 190,519k 8,878k -6.76 Ke7-d6 Nc6xa7
23/43- 00:29 253,132k 8,717k -8.60 Ke7-d6 Nc6xa7
23/43+ 00:29 255,836k 8,717k -8.59 Ke7-d7
23/43 00:35 308,242k 8,762k -9.43 Ke7-d6 Nc6xa7 g6-g5 h4xg5 h6xg5 Kc1-d2 Kd6-d5 Be2-d1 Kd5-c5 Kd2-d3 f5-f4 Kd3-e4 f4-f3 g2xf3 Kc5-b6 Ke4-e5 Kb6xa7 Ke5xe6 Ka7-b6 Ke6-f5 Kb6-b5 Kf5xg5 Kb5-c5 Kg5-h5 Kc5-b4 f3-f4 Kb4-c5 Kh5-g5 Kc5-d6 f4-f5 Kd6-e7 Bd1-h5 Ke7-f8 f5-f6 a5-a4
23/43+ 00:35 310,384k 8,760k -9.42 Ke7-d7
24/49+ 00:40 352,719k 8,722k -8.31 Ke7-d6
24/49 00:41 358,526k 8,719k -9.41 Ke7-d6 Nc6xa7 Kd6-c5 Be2-d1 Kc5-b6 Na7-c8+ Kb6-c7 Nc8-e7 Kc7-d6 Ne7xg6 Kd6-d5 Kc1-d2 Kd5-e4 Ng6-f8 Ke4-f4 Nf8xe6+ Kf4-g3 Kd2-e3 Kg3xg2 Ke3-f4 Kg2-f2 Kf4xf5 Kf2-e1 Kf5-g6 Ke1xd1 Ne6-d4 Kd1-e1 Kg6xh6 a5-a4
24/49 00:46 403,666k 8,703k -9.72 Ke7-d6 Nc6xa7 Kd6-d5 Be2-d1 Kd5-e4 Na7-c6 Ke4-f4 Nc6xa5 g6-g5 h4xg5 h6xg5 Bd1-b3 Kf4-g3 Bb3xe6 Kg3xg2 Be6xf5 Kg2-f3 Na5-c4 g5-g4
25/50- 00:56 486,696k 8,686k -11.84 Ke7-d6 Nc6xa7
25/50 01:07 545,798k 8,068k -13.89 Ke7-d6 Nc6xa7 Kd6-c7 Kc1-d2 Kc7-d6 Be2-d1 Kd6-d5 Bd1-b3+ Kd5-c5 Bb3-a4 Kc5-b4 Ba4-d1 Kb4-c4 Na7-c8 f5-f4 Nc8-e7 e6-e5 Ne7xg6 Kc4-d4 Bd1-c2 h6-h5 Bc2-d1 Kd4-e4 Bd1xh5 Ke4-f5 Ng6xe5 Kf5xe5 Bh5-d1 Ke5-e6 Bd1-f3 Ke6-f6 h4-h5 Kf6-g7 h5-h6+ Kg7-h7 Kd2-c2 a5-a4 Kc2-c3 a4-a3 Kc3-b3 Kh7-g6 h6-h7
25/50+ 01:08 548,238k 8,040k -13.88 Ke7-d7
26/52+ 01:23 657,074k 7,882k -11.73 Ke7-d6
26/55 01:27 687,197k 7,886k -17.04 Ke7-d6 Nc6xa7 Kd6-c7 Kc1-d2 Kc7-b7 Na7-b5 Kb7-c6 Nb5-a3 Kc6-d5 Na3-c4 a5-a4 Kd2-c3 Kd5-c5 Be2-d1 Kc5-b5 Bd1xa4+ Kb5xa4 Nc4-e5 Ka4-b5 Ne5xg6 Kb5-c5 Ng6-e7 Kc5-d6 Ne7-g8 Kd6-d5 Ng8xh6 Kd5-e5 Nh6-f7+ Ke5-f6 Nf7-g5 e6-e5 Kc3-d3 Kf6-g6 Kd3-e3 Kg6-f6 Ng5-f3 Kf6-e6 h4-h5 Ke6-d5 Nf3-g5 Kd5-c4 h5-h6 Kc4-b3 h6-h7 f5-f4+ Ke3-e4 f4-f3 g2xf3 Kb3-b2 h7-h8Q
26/55+ 01:27 687,564k 7,886k -17.03 Ke7-d7
26/55- 01:27 693,492k 7,885k -17.98 Ke7-d6 Nc6xa7
26/55+ 01:28 696,584k 7,884k -12.69 Ke7-d6
26/55 01:40 785,559k 7,852k -17.98 Ke7-d6 Nc6xa7 Kd6-c7 Kc1-d2 Kc7-b7 Na7-b5 Kb7-c6 Nb5-a3 Kc6-d5 Na3-c4 a5-a4 Kd2-c3 Kd5-c6 Be2-d1 Kc6-b5 Bd1xa4+ Kb5xa4 Nc4-e5 g6-g5 h4-h5 g5-g4 Kc3-d2 Ka4-b5 Kd2-e3 Kb5-b4 Ne5-f7 Kb4-c3 Nf7xh6 g4-g3 Nh6-f7 Kc3-b2 h5-h6 Kb2-c1 h6-h7 Kc1-c2 Ke3-f4 Kc2-b3 h7-h8Q Kb3-b4 Qh8-e5 Kb4-b3 Qe5xe6+ Kb3-c3 Qe6xf5 Kc3-b2 Kf4xg3
26/56 01:40 789,234k 7,852k -17.98 Ke7-d6 Nc6xa7 Kd6-c7 Kc1-d2 Kc7-b7 Na7-b5 Kb7-c6 Nb5-a3 Kc6-d5 Na3-c4 a5-a4 Kd2-c3 Kd5-c6 Be2-d1 Kc6-b5 Bd1xa4+ Kb5xa4 Nc4-e5 g6-g5 h4-h5 Ka4-b5 Ne5-f7 g5-g4 Nf7xh6 g4-g3 Nh6-f7 f5-f4 Nf7-g5 e6-e5 Kc3-d3 Kb5-c5 Kd3-e4 Kc5-d6 h5-h6 Kd6-c6 h6-h7 Kc6-c5 h7-h8Q Kc5-c4 Qh8xe5 Kc4-b3 Qe5xf4 Kb3-c2 Qf4xg3
26/56+ 01:40 789,465k 7,852k -17.97 Ke7-d7
27/56+ 01:41 795,706k 7,857k -14.51 Ke7-d6
27/61 01:51 875,261k 7,837k -18.76 Ke7-d6 Nc6xa7 Kd6-c7 Kc1-d2 Kc7-b7 Na7-b5 Kb7-c6 Nb5-a3 Kc6-d5 Na3-c4 a5-a4 Kd2-c3 Kd5-c6 Be2-d1 Kc6-b5 Bd1xa4+ Kb5xa4 Nc4-e5 Ka4-b5 Ne5xg6 Kb5-c5 Ng6-e7 Kc5-d6 Ne7-g8 h6-h5 Ng8-f6 Kd6-e5 Nf6xh5 Ke5-e4 Kc3-d2 e6-e5 Nh5-g7 f5-f4 h4-h5 Ke4-d5 h5-h6 e5-e4 h6-h7 e4-e3+ Kd2-d3 f4-f3 g2xf3 e3-e2 Kd3xe2 Kd5-c6 h7-h8Q Kc6-b6 Qh8-b8+ Kb6-c6 Ng7-f5
27/61+ 01:51 876,869k 7,838k -18.75 Ke7-d7
27/61 02:26 1,119,298k 7,656k -23.84 Ke7-d6 Nc6xa7 Kd6-c7 Kc1-d2 Kc7-d6 Be2-d1 Kd6-d5 Bd1-a4 f5-f4 Kd2-d3 e6-e5 Ba4-b3+ Kd5-c5 Kd3-e4 Kc5-b6 Ke4xe5 f4-f3 g2xf3 Kb6-c5 Bb3-d1 Kc5-c4 Ke5-e4 Kc4-c3 Na7-c6 Kc3-d2 Nc6xa5 Kd2-e1 Na5-c4 h6-h5 Nc4-e5 g6-g5 h4xg5 h5-h4 g5-g6 h4-h3 Ne5-g4 h3-h2 Ng4xh2 Ke1-d2 g6-g7 Kd2-c3 g7-g8Q Kc3-b2 Qg8-b3+ Kb2-a1 Qb3-c3+ Ka1-b1 Qc3-c2+ Kb1-a1
27/61+ 02:27 1,130,728k 7,644k -23.83 Ke7-d7
28/61- 02:33 1,171,305k 7,633k -M152 Ke7-d6 Nc6xa7
28/61+ 02:42 1,226,660k 7,565k -M250 Ke7-d6
29/64 03:47 1,625,041k 7,133k -19.56 Ke7-d6 Nc6xa7 f5-f4 Kc1-d2 Kd6-d5 Be2-d1 g6-g5 h4xg5 h6xg5 Kd2-d3 Kd5-c5 Na7-c8 a5-a4 Bd1xa4 g5-g4 Ba4-d1 f4-f3 g2xf3 g4-g3 Kd3-e3 Kc5-b4 Nc8-d6 Kb4-a3 Nd6-e4 g3-g2 Ke3-f2 Ka3-b2 Kf2xg2 Kb2-c1 Ne4-c5 Kc1-d2 Nc5xe6 Kd2xd1 f3-f4 Kd1-e2 Kg2-g3 Ke2-d2 f4-f5 Kd2-c1 f5-f6 Kc1-d2 f6-f7 Kd2-d3 f7-f8Q Kd3-e4 Qf8-c5
30/64- 03:47 1,625,042k 7,133k -M138 Ke7-d6
30/64+ 03:49 1,636,434k 7,118k -M250 Ke7-d6
31/65 04:08 1,754,217k 7,058k -10.60 Ke7-d6 Nc6xa7 Kd6-d5 Be2-d1 Kd5-e5 Na7-c6+ Ke5-f4 Nc6xa5 h6-h5 Kc1-d2 Kf4-g3 Na5-c4 Kg3xh4 Kd2-e3 Kh4-g5 Ke3-d4 Kg5-f4 Nc4-e5 Kf4-g5 Bd1-e2 Kg5-f6 Be2-c4 g6-g5 Ne5-d7+ Kf6-e7 Kd4-e5 h5-h4 Bc4xe6 h4-h3 g2xh3 f5-f4 Ke5-f5 f4-f3 Nd7-e5 f3-f2 Be6-c4 Ke7-d6 Ne5-g4 Kd6-c5 Ng4xf2 Kc5xc4 Kf5xg5 Kc4-b3 Kg5-g6 Kb3-a2 h3-h4 Ka2-b2 h4-h5 Kb2-a2 h5-h6
32/65- 04:08 1,754,233k 7,058k -13.08 Ke7-d6 Nc6xa7
32/65- 04:08 1,754,240k 7,058k -18.04 Ke7-d6 Nc6xa7
32/65- 04:08 1,754,543k 7,058k -M138 Ke7-d6 Nc6xa7
32/65+ 04:11 1,772,854k 7,047k -M250 Ke7-d6
33/74 05:55 2,357,544k 6,633k -M50 Ke7-d6 Nc6xa7 g6-g5 h4xg5 h6xg5 Be2-d1 Kd6-c5 Kc1-d2 Kc5-b6 Na7-c8+ Kb6-c7 Nc8-e7 Kc7-d6 Ne7-g6 Kd6-c5 Bd1-b3 Kc5-d4 Ng6-e7 Kd4-c5 Bb3xe6 Kc5-d6 Be6xf5 Kd6xe7 Kd2-d3 Ke7-d6 Kd3-e4 a5-a4 Ke4-d4 a4-a3 Kd4-c3 Kd6-e5 Bf5-c8 a3-a2 Kc3-b2 Ke5-d4 Kb2xa2 Kd4-c3 Bc8-g4 Kc3-c2 Bg4-f3 Kc2-c3 Ka2-a3 Kc3-c4 Ka3-b2 Kc4-d3 Kb2-b3 Kd3-d4 Kb3-c2 Kd4-c4 Kc2-d2 Kc4-d4 Kd2-e2 Kd4-e5 Ke2-d3 Ke5-f4 Kd3-d4 g5-g4 Bf3-b7 g4-g3 Bb7-e4 Kf4-g5 Kd4-e3 Kg5-g4 Be4-c2 Kg4-g5 Ke3-f3
34/84 06:53 2,689,619k 6,503k -M50 Ke7-d6 Nc6xa7 Kd6-d5 Be2-d1 Kd5-d6 Kc1-d2 Kd6-c5 Na7-c8 g6-g5 h4xg5 h6xg5 Kd2-d3 Kc5-b4 Nc8-e7 Kb4-c5 Bd1-b3 Kc5-d6 Ne7-g6 g5-g4 Kd3-d2 e6-e5 Kd2-e3 f5-f4+ Ke3-e2 f4-f3+ g2xf3 g4xf3+ Ke2xf3 Kd6-c5 Ng6xe5 Kc5-d4 Kf3-f4 Kd4-c3 Bb3-e6 Kc3-b4 Kf4-e4 Kb4-c5 Be6-d5 Kc5-b4 Ke4-d4 Kb4-b5 Bd5-e6 a5-a4 Be6-d7+ Kb5-b4 Ne5-d3+ Kb4-b3 Nd3-c5+ Kb3-c2 Bd7xa4+ Kc2-b1 Kd4-c3 Kb1-a2 Ba4-d1 Ka2-a3 Nc5-d3 Ka3-a2 Bd1-b3+ Ka2-b1 Nd3-b4 Kb1-c1 Nb4-c2 Kc1-d1
35/84 09:28 3,596,748k 6,326k -20.04 Ke7-d6 Nc6xa7 e6-e5 Kc1-d2 Kd6-c7 Na7-b5+ Kc7-c6 Nb5-a3 e5-e4 Na3-c4 a5-a4 Nc4-e5+ Kc6-c5 Ne5xg6 Kc5-d4 Ng6-e7 Kd4-e5 Ne7-c6+ Ke5-d5 Nc6-b4+ Kd5-c5 Kd2-c3 a4-a3 Kc3-b3 f5-f4 Kb3xa3 Kc5-d4 Be2-h5 f4-f3 g2xf3 e4-e3 Ka3-b3 e3-e2 Nb4-c2+ Kd4-d3 f3-f4 Kd3-e4 Bh5xe2 Ke4-f5 Nc2-d4+ Kf5-f6 Be2-f3 Kf6-f7 h4-h5 Kf7-e7 Kb3-c3 Ke7-d7 Bf3-g2 Kd7-c7 Kc3-b3 Kc7-d7 Nd4-e2 Kd7-e7 Kb3-c3 Ke7-d7 Kc3-b2 Kd7-e7 Ne2-d4 Ke7-d7 Kb2-b3 Kd7-c8 Bg2-f3 Kc8-c7 Kb3-c3
36/84- 09:28 3,596,749k 6,326k -M50 Ke7-d6
36/84+ 14:58 5,501,271k 6,121k -M250 Ke7-d6
37/84 16:52 6,164,460k 6,087k -M47 Ke7-d6 Nc6xa7 Kd6-c7 Kc1-d2 e6-e5 Na7-b5+ Kc7-c6 Nb5-a3 Kc6-d5 Na3-c4 a5-a4 Kd2-c3 e5-e4 Be2-d1 a4-a3 Nc4xa3 Kd5-e5 Na3-c4+ Ke5-d5 Bd1-a4 f5-f4 Ba4-d1 g6-g5 h4xg5 h6xg5 Bd1-e2 Kd5-c5 Nc4-e5 Kc5-d5 Ne5-f7 f4-f3 Be2-c4+ Kd5-c6 g2xf3 e4xf3 Nf7xg5 f3-f2 Kc3-d4 Kc6-d6 Ng5-e4+ Kd6-e7 Kd4-e5 f2-f1Q Bc4xf1 Ke7-f8 Ke5-f6 Kf8-g8 Bf1-c4+ Kg8-h7 Ne4-d6 Kh7-h8 Bc4-e6 Kh8-h7 Nd6-f5 Kh7-h8 Nf5-h4 Kh8-h7 Nh4-g6 Kh7-h6 Be6-g8 Kh6-h5 Ng6-e5 Kh5-h4 Bg8-d5 Kh4-g3 Ne5-d3 Kg3-g4 Kf6-g6
37/84+ 17:36 6,425,178k 6,081k -M48 Ke7-d7
38/84 18:20 6,676,703k 6,069k -M47 Ke7-d6 Nc6xa7 g6-g5 h4xg5 h6xg5 Kc1-d2 Kd6-c5 Be2-d1 g5-g4 Bd1-a4 f5-f4 Na7-c6 Kc5-b6 Kd2-d3 f4-f3 g2xf3 g4xf3 Kd3-e3 f3-f2 Ke3xf2 Kb6-c5 Kf2-f3 Kc5-c4 Kf3-e4 Kc4-c5 Ke4-d3 e6-e5 Nc6xe5 Kc5-b4 Ba4-c6 Kb4-b3 Bc6-d5+ Kb3-b4 Kd3-d4 Kb4-b5 Bd5-e6 a5-a4 Be6-d7+ Kb5-b4 Ne5-d3+ Kb4-b3 Nd3-c5+ Kb3-c2 Bd7xa4+ Kc2-b1 Kd4-c3 Kb1-a2 Ba4-d1 Ka2-a3 Nc5-d3 Ka3-a2 Bd1-b3+ Ka2-b1 Nd3-b4 Kb1-c1 Nb4-c2 Kc1-d1 Nc2-d4+ Kd1-c1 Bb3-a2 Kc1-d1 Ba2-f7 Kd1-c1 Bf7-g6 Kc1-d1 Bg6-f5 Kd1-c1 Nd4-e2+ Kc1-d1 Kc3-d3 Kd1-e1 Kd3-e3 Ke1-d1
39/84 18:35 6,772,086k 6,071k -M47 Ke7-d6 Nc6xa7 g6-g5 h4xg5 h6xg5 Kc1-d2 Kd6-c5 Be2-d1 g5-g4 Bd1-a4 f5-f4 Na7-c6 Kc5-b6 Kd2-d3 f4-f3 g2xf3 g4xf3 Kd3-e3 f3-f2 Ke3xf2 Kb6-c5 Kf2-f3 Kc5-c4 Kf3-e4 Kc4-c5 Ke4-d3 e6-e5 Nc6xe5 Kc5-b4 Ba4-c6 Kb4-b3 Bc6-d5+ Kb3-b4 Kd3-d4 Kb4-b5 Bd5-e6 a5-a4 Be6-d7+ Kb5-b4 Ne5-d3+ Kb4-b3 Nd3-c5+ Kb3-c2 Bd7xa4+ Kc2-b1 Kd4-c3 Kb1-a2 Ba4-d1 Ka2-a3 Nc5-d3 Ka3-a2 Bd1-b3+ Ka2-b1 Nd3-b4 Kb1-c1 Nb4-c2 Kc1-d1 Nc2-d4+ Kd1-c1 Bb3-a2 Kc1-d1 Ba2-f7 Kd1-c1 Bf7-g6 Kc1-d1 Bg6-f5 Kd1-c1 Nd4-e2+ Kc1-d1 Kc3-d3 Kd1-e1 Kd3-e3 Ke1-d1 Bf5-d3 Kd1-e1
40/86 1:12:00 25,153,511k 5,822k -M47 Ke7-d6 Nc6xa7 Kd6-c5 Be2-d1 Kc5-b6 Na7-c8+ Kb6-c7 Nc8-e7 g6-g5 h4xg5 h6xg5 Bd1-b3 f5-f4 Ne7-g6 Kc7-d6 Kc1-d2 e6-e5 Kd2-d3 g5-g4 Kd3-e4 f4-f3 g2xf3 g4xf3 Ke4xf3 Kd6-c5 Kf3-e4 Kc5-b4 Bb3-d5 Kb4-b5 Ng6xe5 Kb5-c5 Bd5-c6 Kc5-d6 Ke4-d4 Kd6-e7 Ne5-c4 Ke7-f6 Nc4xa5 Kf6-f5 Bc6-d5 Kf5-f6 Kd4-e4 Kf6-g6 Ke4-e5 Kg6-g7 Na5-c6 Kg7-g6 Bd5-e6 Kg6-g7 Ke5-f5 Kg7-h6 Nc6-e5 Kh6-g7 Ne5-g6 Kg7-h6 Kf5-f6 Kh6-h7 Be6-c4 Kh7-h6 Bc4-g8 Kh6-h5 Ng6-e5 Kh5-h4 Bg8-d5 Kh4-g3 Ne5-d3 Kg3-g4 Kf6-g6 Kg4-h4 Bd5-f3 Kh4-g3 Bf3-d1
41/86 1:14:49 26,075,279k 5,808k -M46 Ke7-d6 Nc6xa7 Kd6-c5 Be2-d1 Kc5-b6 Na7-c8+ Kb6-c7 Nc8-e7 g6-g5 h4xg5 h6xg5 Bd1-b3 f5-f4 Ne7-g6 Kc7-d6 Kc1-d2 e6-e5 Kd2-d3 g5-g4 Kd3-e4 f4-f3 g2xf3 g4xf3 Ke4xf3 Kd6-c5 Kf3-e4 Kc5-b4 Bb3-d5 Kb4-b5 Ng6xe5 Kb5-c5 Bd5-c6 Kc5-d6 Ke4-d4 Kd6-e7 Ne5-c4 Ke7-f6 Nc4xa5 Kf6-f5 Bc6-d5 Kf5-f6 Kd4-e4 Kf6-g6 Ke4-e5 Kg6-g7 Na5-c4 Kg7-g6 Ke5-e6 Kg6-g5 Bd5-e4 Kg5-f4 Ke6-d5 Kf4-g4 Kd5-e5 Kg4-g5 Nc4-e3 Kg5-h6 Ke5-f6 Kh6-h5 Be4-c2 Kh5-h4 Kf6-f5 Kh4-g3 Ne3-c4 Kg3-f2 Bc2-d1 Kf2-g3 Bd1-g4 Kg3-f2 Kf5-f4 Kf2-e1 Kf4-e3
41/86+ 1:17:11 26,843,075k 5,796k -M47 Ke7-f6
42/86 1:39:52 34,378,701k 5,737k -M46 Ke7-d6 Nc6xa7 Kd6-c5 Be2-d1 Kc5-b6 Na7-c8+ Kb6-c7 Nc8-e7 g6-g5 h4xg5 h6xg5 Bd1-b3 f5-f4 Ne7-g6 Kc7-d6 Kc1-d2 e6-e5 Kd2-d3 g5-g4 Kd3-e4 f4-f3 g2xf3 g4xf3 Ke4xf3 Kd6-c5 Kf3-e4 Kc5-b4 Bb3-d5 Kb4-b5 Ng6xe5 Kb5-c5 Bd5-c6 Kc5-d6 Ke4-d4 Kd6-e7 Ne5-c4 Ke7-f6 Nc4xa5 Kf6-f5 Bc6-d5 Kf5-f6 Kd4-e4 Kf6-g6 Ke4-e5 Kg6-g7 Na5-c4 Kg7-g6 Ke5-e6 Kg6-g5 Bd5-e4 Kg5-f4 Ke6-d5 Kf4-g4 Nc4-e3+ Kg4-f4 Kd5-d4 Kf4-g3 Kd4-e5 Kg3-f2 Ne3-c4 Kf2-e2 Be4-c2 Ke2-e1 Ke5-f5 Ke1-f2 Bc2-d1 Kf2-g3 Bd1-g4 Kg3-f2 Kf5-f4 Kf2-e1 Kf4-e3 Ke1-f1 Nc4-e5 Kf1-g2 Ne5-g6 Kg2-g3 Bg4-f3 Kg3-h3 Ke3-f2

[lkaufman]

This was likely due to net "believing" that human had only 70% chance to execute B+N mate in 50 moves. We are planning a new net that would be opposed by a GM-simulating net so it should assume nearly 100% chance for this. Training and testing may take a couple weeks, we hope it will be stronger than current net.

[Uri Blass]

This was likely due to net "believing" that human had only 70% chance to execute B+N mate in 50 moves. We are planning a new net that would be opposed by a GM-simulating net so it should assume nearly 100% chance for this. Training and testing may take a couple weeks, we hope it will be stronger than current net.

I think another improvement may be using tablebases because even when the KBN vs K happened Leela did not play always the best move to delay the mate and I do not believe non optimal losing move gives better chances in a position with 4 pieces and I doubt if it can give better practical chances with 5 or 6 pieces.

[lkaufman]

This was likely due to net "believing" that human had only 70% chance to execute B+N mate in 50 moves. We are planning a new net that would be opposed by a GM-simulating net so it should assume nearly 100% chance for this. Training and testing may take a couple weeks, we hope it will be stronger than current net.

I think another improvement may be using tablebases because even when the KBN vs K happened Leela did not play always the best move to delay the mate and I do not believe non optimal losing move gives better chances in a position with 4 pieces and I doubt if it can give better practical chances with 5 or 6 pieces.

There is probably little downside to using TB for 4 man positions, though upside will be tiny. For 5 man, I'm not so sure (except for winning TB positions); there may be many positions where a certain move requires a non-obvious reply to win, but it may lose more quickly if the non-obvious move is found.

[jp]

some analysis by slowchess after backward analysis:
...

Slow64-avx2 [001]:
...

Why did you choose Slowchess?

[Uri Blass]

some analysis by slowchess after backward analysis:
...

Slow64-avx2 [001]:
...

Why did you choose Slowchess?

I chose Slowchess because I know from experience that it is relatively good in finding mates