Losing mate scores with and without tablebases

[Uri Blass]

Stockfish without tablebases with single core and 4096 mbytes hash tables lose the mate score that it already found.
I wonder how many top engines do not have this problem because I find the same problem also with other engines

I also wonder if there are engines that it is easier for them to find mates when they use the DTZ tablebases(these tablebases should help to prune drawing moves).

[fen]8/8/3k4/3pNK2/3N4/8/8/8 w - - 0 1[/fen]

Stockfish_22061607_x64_avx2:
NNUE evaluation using nn-3c0aa92af1da.nnue enabled
1/1 00:00 23 23k +2.94 Ne5-d3
2/2 00:00 74 74k +2.94 Ne5-d3
3/2 00:00 142 142k +2.94 Ne5-d3
4/2 00:00 202 202k +2.94 Ne5-d3
5/3 00:00 817 409k +2.38 Ne5-d3 Kd6-e7
6/5 00:00 2k 726k +2.25 Ne5-d3 Kd6-d7
7/7 00:00 3k 825k +2.19 Ne5-d3 Kd6-d7 Kf5-f6 Kd7-c8 Kf6-g7
8/10 00:00 8k 1,081k +2.39 Ne5-d3 Kd6-d7 Kf5-g5 Kd7-d8 Kg5-f6 Kd8-d7 Kf6-f7
9/9 00:00 13k 1,202k +2.25 Ne5-d3 Kd6-d7 Kf5-g6 Kd7-c8 Kg6-f6 Kc8-d8 Nd3-c5 Kd8-c7
10/15 00:00 33k 1,379k +2.16 Ne5-d3 Kd6-d7 Kf5-g6 Kd7-e7 Kg6-g7 Ke7-d8 Kg7-f7 Kd8-d7 Kf7-f8 Kd7-d8
11/12 00:00 46k 1,424k +2.12 Ne5-d3 Kd6-d7 Kf5-g6 Kd7-c7 Kg6-g7 Kc7-d6 Kg7-f6 Kd6-d7 Kf6-f7 Kd7-d8 Nd3-e5
12/16 00:00 76k 1,483k +2.01 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-d8 Kg6-f6 Kd8-e8 Nd3-c5 Ke8-d8 Kf6-f7 Kd8-c7 Kf7-e7 Kc7-c8
13/20 00:00 90k 1,480k +2.00 Ne5-d3 Kd6-d7 Kf5-g6 Kd7-e7 Kg6-g7 Ke7-d6 Kg7-f6 Kd6-d7 Kf6-f7 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7
14/20 00:00 135k 1,506k +1.92 Ne5-c6 Kd6-d7 Kf5-e5 Kd7-e8 Ke5-e6 Ke8-f8 Ke6-f6 Kf8-e8 Nc6-e5 Ke8-f8 Ne5-d3 Kf8-e8 Kf6-e6 Ke8-f8 Ke6-d6
15/23 00:00 160k 1,466k +2.01 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-e8 Kg6-f6 Ke8-f8 Nd3-f4 Kf8-e8 Kf6-e6 Ke8-d8 Ke6-f7 Kd8-d7 Nf4-d3 Kd7-d8 Nd3-e5 Kd8-c7 Kf7-e7 Kc7-b6 Ne5-d3 Kb6-c7
16/23 00:00 173k 1,477k +2.32 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-e8 Kg6-f6 Ke8-f8 Nd3-f4 Kf8-e8 Kf6-e6 Ke8-d8 Ke6-f7 Kd8-d7 Nf4-d3 Kd7-d8 Nd3-c5 Kd8-c7 Kf7-e8 Kc7-c8 Ke8-e7 Kc8-c7 Nc5-d3
17/29 00:00 202k 1,473k +2.09 Ne5-d3 Kd6-d7 Kf5-g6 Kd7-e7 Kg6-g7 Ke7-e8 Kg7-f6 Ke8-f8 Nd3-f4 Kf8-e8 Kf6-e6 Ke8-f8 Nf4-h5 Kf8-e8 Nh5-g7+ Ke8-d8 Ke6-d6 Kd8-c8 Ng7-e6 Kc8-b7 Kd6-d7 Kb7-b6
18/29 00:00 328k 1,457k +1.80 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-e5 Ke8-f8 Ne5-d7+ Kf8-e8 Kf6-e6 Ke8-d8 Nd7-f6 Kd8-c7 Ke6-e7 Kc7-b6 Ke7-d6 Kb6-a6 Nf6-e8 Ka6-b6 Ne8-c7 Kb6-b7
19/30 00:00 346k 1,452k +1.90 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-e5 Ke8-f8 Ne5-d7+ Kf8-e8 Kf6-e6 Ke8-d8 Nd7-f6 Kd8-c7 Ke6-e7 Kc7-b6 Ke7-d6 Kb6-a6 Nf6-e8 Ka6-a5 Kd6-c5 Ka5-a4 Ne8-c7 Ka4-a5 Nc7-e6
20/30 00:00 380k 1,444k +1.93 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-e5 Ke8-f8 Ne5-d7+ Kf8-e8 Kf6-e6 Ke8-d8 Nd7-f6 Kd8-c7 Nf6-h5 Kc7-d8 Ke6-f7 Kd8-d7 Nh5-f4 Kd7-d6 Nf4-d3 Kd6-d7 Kf7-f8 Kd7-c7 Kf8-e7 Kc7-c8
21/36 00:00 530k 1,433k +1.88 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-e5 Ke8-f8 Ne5-d7+ Kf8-e8 Kf6-e6 Ke8-d8 Nd7-f6 Kd8-c7 Ke6-e7 Kc7-b6 Ke7-d6 Kb6-a5 Kd6-c5 Ka5-a6 Nf6-h5 Ka6-b7 Kc5-d6 Kb7-c8 Kd6-e7 Kc8-c7 Nh5-f4 Kc7-c8 Nf4-d3
22/38 00:00 545k 1,434k +1.93 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-e5 Ke8-f8 Ne5-d7+ Kf8-e8 Kf6-e6 Ke8-d8 Nd7-f6 Kd8-c7 Ke6-e7 Kc7-b6 Ke7-d6 Kb6-a7 Kd6-d7 Ka7-b7 Nf6-h5 Kb7-b6 Nh5-f4
23/31 00:00 615k 1,436k +1.94 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-f4 Ke8-f8 Kf6-e6 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-f4 Kd7-d6 Nf4-d3 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7
24/28 00:00 658k 1,435k +1.83 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-f4 Ke8-f8 Kf6-e6 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-f4 Kd7-d8 Nf4-d3 Kd8-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8
25/35 00:00 700k 1,437k +1.91 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-f4 Ke8-f8 Kf6-e6 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-f4 Kd7-d8 Nf4-d3 Kd8-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7
26/42 00:00 753k 1,437k +2.02 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-f4 Ke8-f8 Kf6-e6 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-f4 Kd7-d8 Nf4-d3 Kd8-d7 Kf7-f8 Kd7-c7 Kf8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8 Kf7-f8 Kd8-c8 Kf8-e8 Kc8-c7 Ke8-e7
27/35 00:00 834k 1,445k +2.18 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-c5 Ke8-f8 Nc5-d7+ Kf8-e8 Kf6-e6 Ke8-d8 Nd7-f6 Kd8-c8 Ke6-e7 Kc8-c7 Nf6-d7 Kc7-c8 Nd7-c5 Kc8-c7 Ke7-e6 Kc7-d8 Ke6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-c5
28/42 00:00 1,175k 1,392k +2.13 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-c5 Ke8-f8 Nc5-d7+ Kf8-e8 Kf6-e6 Ke8-d8 Nd7-f6 Kd8-c8 Ke6-e7 Kc8-c7 Nf6-d7 Kc7-c8 Nd7-c5 Kc8-c7 Ke7-e6 Kc7-d8 Ke6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-c5 Kb6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-b7 Kd7-d8 Kb7-b6 Kd8-c8 Kb6-a7
29/48 00:00 1,288k 1,392k +2.23 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-c5 Ke8-f8 Nc5-d7+ Kf8-e8 Kf6-e6 Ke8-d8 Nd7-f6 Kd8-c8 Ke6-e7 Kc8-c7 Nf6-d7 Kc7-c8 Nd7-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-b8 Kf7-f8 Kb8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-b6 Ke7-d6 Kb6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-a5 Kd7-c8 Ka5-b6 Kc8-b8 Kb6-a6 Kb8-c7 Ka6-a5 Kc7-b7
30/46 00:01 2,266k 1,428k +2.26 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d6 Kg6-f6 Kd6-d7 Ne6-f4 Kd7-e8 Kf6-e6 Ke8-f8 Nf4-h5 Kf8-e8 Nh5-g7+ Ke8-d8 Ke6-d6 Kd8-c8 Ng7-e6 Kc8-b7 Ne6-c5+ Kb7-c8 Kd6-e6 Kc8-c7 Ke6-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-b6 Nc5-b3 Kb6-b7 Kd6-d7
31/41 00:01 2,391k 1,429k +2.24 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d6 Kg6-f6 Kd6-d7 Ne6-f4 Kd7-d8 Kf6-f7 Kd8-d7 Nf4-d3 Kd7-c7 Kf7-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-b6 Nc5-b3 Kb6-b7 Kd6-d7
32/46 00:01 2,647k 1,432k +2.22 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d6 Kg6-f6 Kd6-d7 Ne6-f4 Kd7-d8 Kf6-f7 Kd8-d7 Nf4-d3 Kd7-c7 Kf7-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-a5 Kd7-c8 Ka5-b6 Kc8-b8 Kb6-a6 Kb8-c7 Ka6-a5
33/38 00:02 2,936k 1,439k +2.22 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-f4 Kd7-d6 Nf4-d3 Kd6-d7 Kf6-f7 Kd7-c7 Kf7-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3
34/44 00:02 3,985k 1,452k +2.20 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-f4 Kd7-d6 Nf4-d3 Kd6-d7 Kf6-f7 Kd7-c7 Kf7-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8 Kf7-f8 Kd8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-a5 Kd7-c8
35/48 00:02 4,234k 1,448k +2.23 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-f4 Kd7-d6 Nf4-d3 Kd6-d7 Kf6-f7 Kd7-c7 Kf7-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8 Kf7-f8 Kd8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-a5 Kd7-c8 Ka5-a6 Kc8-c7 Ka6-a5 Kc7-b7 Ka5-a4
36/57 00:03 4,813k 1,446k +2.20 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-f4 Kd7-d8 Kf6-f7 Kd8-d7 Nf4-d3 Kd7-c7 Kf7-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8 Kf7-f8 Kd8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-a5 Kd7-c6 Ka5-a6 Kc6-c7 Ka6-a5 Kc7-b7 Ka5-a4 Kb7-b6 Ka4-a3 Kb6-a5 Ka3-a2 Ka5-a4 Ka2-a1 Ka4-a3 Ka1-b1
37/52 00:03 5,164k 1,460k +2.20 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-f4 Kd7-d8 Kf6-f7 Kd8-d7 Nf4-d3 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8 Kf7-f8 Kd8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-a5 Kd7-c6 Ka5-a6 Kc6-c7 Ka6-a5 Kc7-b7
38/53 00:03 5,548k 1,477k +2.31 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-f4 Kd7-d8 Kf6-f7 Kd8-d7 Nf4-d3 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8 Kf7-f8 Kd8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-f4 Ka6-b6 Nf4-d3 Kb6-b7 Kd6-d7 Kb7-b6 Kd7-d8 Kb6-a5 Kd8-c8 Ka5-a4 Kc8-c7 Ka4-a3 Kc7-b7
39/45+ 00:03 5,645k 1,481k +2.40 Ne5-d3
39/52+ 00:04 6,099k 1,491k +2.53 Ne5-d3
39/56+ 00:04 6,497k 1,489k +4.00 Ne5-d3
39/56 00:04 6,505k 1,489k +4.00 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-c5+ Kd7-d6 Nc5-d3 Kd6-d7 Kf6-f7 Kd7-c7 Kf7-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8 Kf7-f8 Kd8-c7 Kf8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-b7 Nd3-c5+ Kb7-b6 Nc5-b3 Kb6-b7 Kd7-d8 Kb7-b6 Kd8-c8 Kb6-a7 Kc8-c7 Ka7-a6 Kc7-c6 Ka6-a7
40/57+ 00:04 6,699k 1,490k +4.17 Ne5-d3
40/57+ 00:04 6,814k 1,491k +4.41 Ne5-d3
40/62+ 00:05 7,595k 1,490k +M50 Ne5-d3
40/62 00:05 7,596k 1,490k +7.06 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-c5+ Kd7-e8 Kf6-e6 Ke8-f8 Nc5-d3 Kf8-e8 Nd3-f4 Ke8-d8 Ke6-f7 Kd8-d7 Nf4-d3 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8
41/45- 00:06 10,121k 1,577k +21.36 Ne5-d3 Kd6-e7
41/51+ 00:06 10,159k 1,577k +152.65 Ne5-d3
41/51 00:06 10,567k 1,575k +M46 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-e8 Kg6-f6 Ke8-d7 Ne6-c5+ Kd7-e8 Kf6-e6 Ke8-f8 Nc5-d3 Kf8-e8 Nd3-f4 Ke8-d8 Ke6-f7 Kd8-d7 Nf4-d3 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c7 Kf7-e7 Kc7-b6 Ke7-d6 Kb6-a5 Nc5-d3 Ka5-a6 Kd6-c6 Ka6-a7
42/65 00:13 22,759k 1,638k +M43 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-c5+ Kd7-e8 Kf6-e6 Ke8-f8 Nc5-d3 Kf8-e8 Nd3-f4 Ke8-d8 Ke6-f7 Kd8-d7 Nf4-d3 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8 Kf7-f8 Kd8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a7 Ne6-f4 Ka7-a8 Kd6-c7 Ka8-a7
43/61 00:17 30,505k 1,714k +M45 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-c5+ Kd7-e8 Kf6-e6 Ke8-f8 Nc5-d3 Kf8-e8 Nd3-f4 Ke8-d8 Ke6-f7 Kd8-d7 Nf4-d3 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8 Kf7-f8 Kd8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-c5
44/60 00:19 34,211k 1,751k +M47 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-f4 Kd7-e8 Kf6-e6 Ke8-d8 Ke6-f7 Kd8-d7 Nf4-d3 Kd7-c7 Kf7-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-d8 Ke6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-b6 Nc5-b3 Kb6-b7 Kd6-d7 Kb7-b6 Kd7-c8 Kb6-a7 Kc8-c7 Ka7-a6 Kc7-c6 Ka6-a7 Nb3-c5 Ka7-b8
45/50 00:23 43,879k 1,835k +7.54 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-f4 Kd7-e8 Kf6-e6 Ke8-d8 Ke6-f7 Kd8-d7 Nf4-d3 Kd7-c7 Kf7-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-d8 Ke6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-b6 Nc5-d3 Kb6-b7 Kd6-d7 Kb7-b6 Kd7-c8 Kb6-a6 Kc8-c7
46/54+ 00:23 43,887k 1,836k +152.65 Ne5-d3
46/57- 00:28 53,862k 1,872k +21.91 Ne5-d3 Kd6-e7
46/57+ 00:28 53,864k 1,872k +152.65 Ne5-d3
46/57 00:31 59,738k 1,899k +M40 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-f4 Kd7-e8 Kf6-e6 Ke8-d8 Ke6-f7 Kd8-d7 Nf4-d3 Kd7-c7 Kf7-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8 Kf7-f8 Kd8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-f4 Ka6-a5 Kd6-c5 Ka5-a6 Kc5-c6 Ka6-a7 Nf4-d3 Ka7-b8 Kc6-d7 Kb8-b7
47/54 00:39 76,828k 1,948k +M42 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-f4 Kd7-d6 Nf4-d3 Kd6-d7 Kf6-f7 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-b8 Kf6-f7 Kb8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-f4 Ka6-a5 Kd6-c5 Ka5-a6 Kc5-c6 Ka6-a7 Nf4-d3 Ka7-b8 Nd3-c5 Kb8-c8
48/71 00:44 89,499k 1,993k +M42 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e7 Nf4-e6 Ke7-d7 Kg6-f7 Kd7-d6 Kf7-f6 Kd6-d7 Ne6-f4 Kd7-d6 Nf4-d3 Kd6-d7 Kf6-f7 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-b8 Kf6-f7 Kb8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-f4 Ka6-a5 Kd6-c5 Ka5-a6 Kc5-c6 Ka6-a7 Nf4-d3 Ka7-b8 Nd3-c5 Kb8-c8 Nc5-e6 Kc8-b8
49/58 00:49 101,057k 2,028k +M44 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e8 Kg6-g7 Ke8-e7 Nf4-d3 Ke7-e8 Kg7-f6 Ke8-f8 Nd3-f4 Kf8-e8 Kf6-e6 Ke8-d8 Ke6-f7 Kd8-d7 Nf4-d3 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-b8 Kf7-f8 Kb8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-b7 Kd7-d8 Kb7-b6 Kd8-c8 Kb6-a7 Nd3-c5 Ka7-b6 Nc5-b3 Kb6-a7 Kc8-d8 Ka7-b7 Nb3-c5+ Kb7-b6
50/82 01:23 177,031k 2,113k +M38 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Nd3-f4 Kf8-e8 Kg6-g7 Ke8-e7 Nf4-d3 Ke7-e8 Kg7-f6 Ke8-f8 Kf6-e6 Kf8-e8 Nd3-f4 Ke8-d8 Ke6-f7 Kd8-d7 Nf4-d3 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-b8 Kf6-f7 Kb8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-b7 Kd7-d8 Kb7-b6 Kd8-c8 Kb6-a6 Kc8-c7 Ka6-a5
51/64 01:51 241,602k 2,166k +M35 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-e5 Ke8-f8 Ne5-d7+ Kf8-e8 Kf6-e6 Ke8-d8 Nd7-f6 Kd8-c8 Ke6-e7 Kc8-c7 Nf6-d7 Kc7-c8 Nd7-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-b8 Kf7-f8 Kb8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-b7 Nd3-c5+ Kb7-b6 Nc5-b3 Kb6-b7 Kd7-d8 Kb7-b6 Kd8-c8 Kb6-a7 Kc8-c7 Ka7-a6 Kc7-c6 Ka6-a7 Nb3-c5 Ka7-b8 Kc6-d7 Kb8-a8
52/56 02:31 336,014k 2,224k +M35 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-e5 Ke8-f8 Ne5-d7+ Kf8-e8 Kf6-e6 Ke8-d8 Nd7-f6 Kd8-c8 Ke6-e7 Kc8-c7 Nf6-d7 Kc7-c8 Nd7-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-b8 Kf7-f8 Kb8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-b7 Nd3-c5+ Kb7-b6 Nc5-b3 Kb6-b7 Kd7-d8 Kb7-b6 Kd8-c8 Kb6-a7 Kc8-c7 Ka7-a6 Kc7-c6 Ka6-a7 Nb3-c5 Ka7-b8 Kc6-d7 Kb8-a8
53/61 03:03 417,044k 2,270k +M40 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-e5 Ke8-f8 Ne5-d7+ Kf8-e8 Kf6-e6 Ke8-d8 Nd7-f6 Kd8-c8 Ke6-e7 Kc8-c7 Nf6-d7 Kc7-c8 Nd7-c5 Kc8-c7 Ke7-e6 Kc7-d8 Ke6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-b7 Nd3-c5+ Kb7-b6 Nc5-b3 Kb6-b7 Kd7-d8 Kb7-b6 Kd8-c8 Kb6-a7 Kc8-c7 Ka7-a6 Kc7-c6 Ka6-a7 Nb3-c5 Ka7-b8 Kc6-d7 Kb8-a8 Kd7-c7 Ka8-a7 Nc5-d3

using syzygy tablebases seems not to help in finding the shortest mate.

FEN: 8/8/3k4/3pNK2/3N4/8/8/8 w - - 0 1

Stockfish_22061607_x64_avx2:
Found 145 tablebases
NNUE evaluation using nn-3c0aa92af1da.nnue enabled
1/1 00:00 9 1k +152.65 Ne5-d3
2/2 00:00 34 5k +152.65 Ne5-d3
3/2 00:00 105 15k +152.65 Ne5-d3
4/2 00:00 161 23k +152.65 Ne5-d3
5/3 00:00 361 52k +152.65 Ne5-d3 Kd6-e7
6/3 00:00 929 116k +152.65 Ne5-d3 Kd6-d7
7/8 00:00 5k 468k +152.65 Ne5-d3 Kd6-e7 Nd3-e5 Ke7-d6 Ne5-c6 Kd6-c5 Kf5-f4 Kc5-b6
8/9 00:00 8k 692k +152.65 Ne5-d3 Kd6-c7 Kf5-f6 Kc7-b7 Kf6-e7 Kb7-c8
9/11 00:00 17k 934k +152.65 Ne5-d3 Kd6-d7 Kf5-f6 Kd7-d6 Kf6-f7 Kd6-d7 Kf7-f8 Kd7-c7 Kf8-e7
10/11 00:00 23k 1,079k +152.65 Ne5-d3 Kd6-d7 Kf5-g6 Kd7-c7 Kg6-g7 Kc7-d8
11/11 00:00 28k 1,117k +152.65 Ne5-d3 Kd6-d7 Kf5-g6 Kd7-d6 Kg6-f6 Kd6-d7 Kf6-f7 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7
12/17 00:00 35k 1,173k +152.65 Ne5-d3 Kd6-d7 Kf5-f6 Kd7-d6 Kf6-f7 Kd6-d7 Kf7-f8 Kd7-c7 Kf8-e7 Kc7-c8 Ke7-d6 Kc8-d8 Kd6-c6 Kd8-c8
13/18 00:00 47k 1,272k +152.65 Ne5-d3 Kd6-d7 Kf5-f6 Kd7-d6 Kf6-g6 Kd6-c7 Kg6-g7 Kc7-d8 Kg7-f6 Kd8-d7 Kf6-f7 Kd7-d6 Kf7-e8 Kd6-c7
14/20 00:00 54k 1,323k +152.65 Ne5-d3 Kd6-d7 Kf5-f6 Kd7-d6 Kf6-g6 Kd6-c7 Kg6-g7 Kc7-c8 Kg7-f6 Kc8-d7 Kf6-f7 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7 Kc7-c8
15/20 00:00 70k 1,365k +152.65 Ne5-d3 Kd6-d7 Kf5-f6 Kd7-d6 Kf6-f7 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Ke7-d6 Kc8-d8 Nd3-e5 Kd8-e8 Kd6-c7 Ke8-f8
16/19 00:00 80k 1,357k +152.65 Ne5-d3 Kd6-d7 Kf5-f6 Kd7-d6 Kf6-f7 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Ke7-d6 Kc8-d8 Kd6-e6 Kd8-e8 Ke6-f6 Ke8-d8 Nd3-c5
17/25 00:00 113k 1,410k +152.65 Ne5-d3 Kd6-d7 Kf5-g6 Kd7-c7 Kg6-g7 Kc7-d6 Kg7-f6 Kd6-d7 Kf6-f7 Kd7-d6 Kf7-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-e5 Kc8-c7 Ke7-e6 Kc7-d8 Ke6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7
18/26 00:00 124k 1,430k +152.65 Ne5-d3 Kd6-d7 Kf5-g6 Kd7-c7 Kg6-g7 Kc7-d6 Kg7-f7 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-e5 Kc8-c7 Ke7-e6 Kc7-d8 Ke6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Ne5-d3 Kc8-c7
19/27 00:00 166k 1,446k +152.65 Ne5-d3 Kd6-d7 Kf5-g6 Kd7-c7 Kg6-f7 Kc7-d7 Kf7-f8 Kd7-c7 Kf8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-d8 Ke6-f7 Kd8-c7 Kf7-e7 Kc7-c8 Nc5-d3 Kc8-c7 Ke7-e6 Kc7-d8
20/27 00:00 304k 1,446k +152.65 Ne5-d3 Kd6-d7 Kf5-g6 Kd7-c7 Kg6-f6 Kc7-d8 Nd3-c5 Kd8-c8 Kf6-f7 Kc8-d8 Kf7-f8 Kd8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-d3 Kc8-c7 Nd3-e5 Kc7-c8 Ke7-e6 Kc8-c7
21/36 00:00 636k 1,437k +152.65 Ne5-c6 Kd6-c5 Kf5-e5 Kc5-c4 Nc6-a5+ Kc4-d3 Na5-b3 Kd3-e3 Ke5-f5 Ke3-f2 Kf5-f4 Kf2-g2 Nb3-c5 Kg2-h3 Nc5-e6 Kh3-g2 Ne6-g5 Kg2-f2 Ng5-f7 Kf2-f1 Kf4-f3 Kf1-e1 Kf3-e3 Ke1-f1 Nf7-h6 Kf1-e1 Nh6-g8 Ke1-d1
22/39 00:00 765k 1,414k +152.65 Ne5-c6 Kd6-c5 Kf5-e5 Kc5-c4 Nc6-a5+ Kc4-d3 Na5-b3 Kd3-e3 Ke5-f5 Ke3-f2 Kf5-f4 Kf2-f1 Nb3-c5 Kf1-g2 Nc5-d3 Kg2-h3 Nd4-f5 d5-d4 Kf4-f3 Kh3-h2 Kf3-g4 Kh2-g2 Nf5-g3 Kg2-h2 Ng3-e4 Kh2-g2 Ne4-g5 Kg2-h2 Kg4-f3 Kh2-g1
23/33 00:00 969k 1,393k +152.65 Ne5-c6 Kd6-c7 Kf5-e6 Kc7-b6 Ke6-d6 Kb6-b7 Nc6-e5 Kb7-c8 Kd6-e6 Kc8-d8 Ke6-f7 Kd8-c7 Kf7-e7 Kc7-c8 Ne5-d3 Kc8-c7 Nd3-c5 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-f4 Kb6-b7 Kd6-d7 Kb7-b6 Nf4-d3
24/41 00:01 1,737k 1,431k +152.65 Ne5-c6 Kd6-d7 Kf5-e5 Kd7-e8 Ke5-f6 Ke8-d7 Nc6-b4 Kd7-e8 Nb4-d3 Ke8-f8 Nd3-f4 Kf8-e8 Kf6-e6 Ke8-f8 Nf4-h5 Kf8-e8 Nh5-g7+ Ke8-d8 Ke6-d6 Kd8-c8 Ng7-e6 Kc8-b7 Ne6-c5+ Kb7-c8 Kd6-e6 Kc8-d8 Ke6-f7 Kd8-c7 Kf7-e7 Kc7-b6 Ke7-d6 Kb6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-a7 Kd7-c8 Ka7-b6
25/46 00:01 1,779k 1,434k +152.65 Ne5-c6 Kd6-d7 Kf5-e5 Kd7-e8 Ke5-f6 Ke8-d7 Nc6-e5+ Kd7-e8 Ne5-d3 Ke8-f8 Nd3-f4 Kf8-e8 Kf6-e6 Ke8-f8 Nf4-h5 Kf8-e8 Nh5-g7+ Ke8-d8 Ke6-d6 Kd8-c8 Ng7-e6 Kc8-b7 Ne6-c5+ Kb7-c8 Kd6-e6 Kc8-d8 Ke6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-c8
26/42 00:01 1,983k 1,442k +152.65 Ne5-c6 Kd6-d7 Kf5-e5 Kd7-e8 Ke5-f6 Ke8-d7 Nc6-b4 Kd7-e8 Nb4-d3 Ke8-f8 Nd3-f4 Kf8-e8 Kf6-e6 Ke8-f8 Nf4-h5 Kf8-e8 Nh5-g7+ Ke8-d8 Ke6-d6 Kd8-c8 Ng7-e6 Kc8-b7 Ne6-c5+ Kb7-c8 Kd6-e6 Kc8-c7 Ke6-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-c5 Kb6-a5 Nc5-d3 Ka5-b6
27/47 00:01 2,254k 1,457k +152.65 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-e5 Ke8-f8 Ne5-g6+ Kf8-e8 Kf6-e6 Ke8-d8 Ke6-f7 Kd8-c7 Ng6-e5 Kc7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c7 Kf7-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a7 Ne6-f4
28/48 00:01 2,379k 1,455k +152.65 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-e5 Ke8-f8 Ne5-g6+ Kf8-e8 Kf6-e6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-c7 Kf8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-d8 Ke6-f7 Kd8-c7 Kf7-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-c5 Kb6-a5 Nc5-d3 Ka5-b6 Kd6-d7
29/44 00:01 2,533k 1,452k +152.65 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-e5 Ke8-f8 Ne5-g6+ Kf8-e8 Kf6-e6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-c7 Kf8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-d8 Ke6-f7 Kd8-c7 Kf7-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-c5 Kb6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-a5 Kd7-c8 Ka5-a4 Kc8-c7 Ka4-a3
30/48 00:01 2,653k 1,450k +152.65 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-e5 Ke8-f8 Ne5-g6+ Kf8-e8 Kf6-e6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-c7 Kf8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-d8 Ke6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-c5 Kb6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-a5 Kd7-c8 Ka5-a4 Kc8-c7 Ka4-a3 Kc7-b7 Ka3-a4
31/59 00:02 3,036k 1,476k +152.65 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Nd3-e5 Ke8-f8 Ne5-g6+ Kf8-e8 Kf6-e6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-c7 Kf8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-d8 Ke6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-b6 Ke7-d6 Kb6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-b7 Kd7-d8 Kb7-b6 Kd8-c8 Kb6-a7 Kc8-c7 Ka7-a6 Kc7-c6
32/68 00:03 4,550k 1,481k +152.65 Ne5-d3
32/68 00:03 4,635k 1,481k +152.65 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Kf6-e6 Ke8-f8 Nd3-f4 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-c5 Kb6-a5 Nc5-d3
33/57 00:03 4,983k 1,483k +152.65 Ne5-d3 Kd6-e7
33/65 00:03 5,288k 1,486k +152.65 Ne5-d3
33/67 00:03 5,446k 1,490k +152.65 Ne5-d3 Kd6-e7
33/67 00:03 5,458k 1,491k +152.65 Ne5-d3
33/67 00:04 6,591k 1,467k +152.65 Ne5-d3
33/67 00:04 6,598k 1,467k +152.65 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Kf6-e6 Ke8-f8 Nd3-f4 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-c8 Kd6-c6 Kc8-b8 Kc6-d7 Kb8-b7 Ne6-c5+ Kb7-b6 Nc5-b3 Kb6-b7 Kd7-d8 Kb7-b6 Kd8-c8 Kb6-a7 Nb3-c5 Ka7-b6 Nc5-d3 Kb6-a7 Kc8-c7 Ka7-a6 Kc7-c6 Ka6-a7 Nd3-c5 Ka7-b8 Kc6-d7
34/53 00:04 6,816k 1,477k +152.65 Ne5-d3 Kd6-e7
34/53 00:04 7,272k 1,488k +152.65 Ne5-d3 Kd6-e7
34/64 00:04 7,374k 1,490k +152.65 Ne5-d3
34/64+ 00:05 8,391k 1,505k +M43 Ne5-d3
34/64 00:05 8,442k 1,507k +152.65 Ne5-d3 Kd6-e7
34/64 00:05 8,627k 1,509k +152.65 Ne5-d3 Kd6-d7 Kf5-f6 Kd7-e8 Kf6-e6 Ke8-d8 Nd3-f4 Kd8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-c5 Kb6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-b7
35/2 00:05 8,685k 1,510k +152.65 Ne5-d3
35/2 00:05 8,701k 1,511k +152.65 Ne5-d3
35/52 00:06 9,189k 1,519k +152.65 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-e8 Kg6-f6 Ke8-f8 Kf6-e6 Kf8-g7 Nd3-f4 Kg7-f8 Nf4-h5 Kf8-e8 Nh5-g7+ Ke8-d8 Ke6-d6 Kd8-c8 Ng7-e6 Kc8-b7 Ne6-f4 Kb7-c8 Kd6-e7 Kc8-c7 Nf4-d3 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-c8 Kd6-c6 Kc8-b8 Kc6-d7 Kb8-a8
36/53+ 00:06 9,193k 1,520k +M42 Ne5-d3
36/53 00:06 9,608k 1,521k +152.65 Ne5-d3 Kd6-e7
36/53+ 00:06 9,610k 1,521k +M42 Ne5-d3
36/53 00:06 9,730k 1,525k +M37 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-e8 Kg6-f6 Ke8-f8 Kf6-e6 Kf8-g7 Nd3-f4 Kg7-f8 Nf4-h5 Kf8-e8 Nh5-g7+ Ke8-d8 Ke6-d6 Kd8-c8 Ng7-e6 Kc8-b7 Ne6-f4 Kb7-c8 Kd6-e7 Kc8-c7 Nf4-d3 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8
37/39 00:06 10,173k 1,537k +M37 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-e8 Kg6-f6 Ke8-f8 Kf6-e6 Kf8-g7 Nd3-f4 Kg7-f8 Nf4-h5 Kf8-e8 Nh5-g7+ Ke8-d8 Ke6-d6 Kd8-c8 Ng7-e6 Kc8-b7 Ne6-f4 Kb7-c8 Kd6-e7 Kc8-c7 Nf4-d3 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6
38/53 00:07 10,881k 1,549k +M37 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-e8 Kg6-f6 Ke8-f8 Kf6-e6 Kf8-g7 Nd3-f4 Kg7-f8 Nf4-h5 Kf8-e8 Nh5-g7+ Ke8-d8 Ke6-d6 Kd8-c8 Ng7-e6 Kc8-b7 Ne6-f4 Kb7-c8 Kd6-e7 Kc8-c7 Nf4-d3 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6
39/47 00:07 11,933k 1,569k +M37 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-e8 Kg6-f6 Ke8-f8 Nd3-f4 Kf8-e8 Kf6-e6 Ke8-f8 Nf4-h5 Kf8-e8 Nh5-g7+ Ke8-d8 Ke6-d6 Kd8-c8 Ng7-e6 Kc8-b7 Ne6-f4 Kb7-c8 Kd6-e7 Kc8-c7 Nf4-d3 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6
40/47 00:08 13,392k 1,600k +152.65 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-e8 Kg6-f6 Ke8-f8 Nd3-f4 Kf8-e8 Kf6-e6 Ke8-f8 Nf4-h5 Kf8-e8 Nh5-g7+ Ke8-d8 Ke6-d6 Kd8-c8 Ng7-e6 Kc8-b7 Ne6-f4 Kb7-c8 Kd6-e7 Kc8-c7 Nf4-d3 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-c5 Kb6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-b7 Kd7-d8
41/51+ 00:08 13,397k 1,600k +M44 Ne5-d3
41/51 00:08 13,783k 1,605k +M37 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-e8 Kg6-f6 Ke8-f8 Nd3-f4 Kf8-e8 Kf6-e6 Ke8-f8 Nf4-h5 Kf8-e8 Nh5-g7+ Ke8-d8 Ke6-d6 Kd8-c8 Ng7-e6 Kc8-b7 Ne6-f4 Kb7-c8 Kd6-e7 Kc8-c7 Nf4-d3 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8 Kf7-f8 Kd8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-c5
42/58 00:10 16,964k 1,658k +M37 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-e8 Kg6-f6 Ke8-f8 Nd3-f4 Kf8-e8 Kf6-e6 Ke8-f8 Nf4-h5 Kf8-e8 Nh5-g7+ Ke8-d8 Ke6-d6 Kd8-c8 Ng7-e6 Kc8-b7 Ne6-f4 Kb7-c8 Kd6-e7 Kc8-c7 Nf4-d3 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8 Kf7-f8 Kd8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-c5 Kb6-a5 Nc5-d3
43/64 00:11 19,170k 1,642k +M37 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Kf6-e6 Ke8-f8 Nd3-f4 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-b7 Kd7-d8 Kb7-b6 Kd8-c8 Kb6-a7 Nd3-c5 Ka7-b6 Nc5-b7 Kb6-a7 Kc8-c7 Ka7-a6 Kc7-c6 Ka6-a7 Nb7-c5 Ka7-b8 Kc6-d7
44/45 00:13 22,729k 1,693k +M37 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Kf6-e6 Ke8-f8 Nd3-f4 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7
45/64 00:16 28,346k 1,752k +M37 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Kf6-e6 Ke8-f8 Nd3-f4 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-b7
46/47 00:19 34,695k 1,810k +M37 Ne5-d3 Kd6-e7 Kf5-g6 Ke7-f8 Kg6-f6 Kf8-e8 Kf6-e6 Ke8-f8 Nd3-f4 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f6 Kc8-d8 Kf6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-a6 Ne6-c5+ Ka6-a5 Nc5-d3 Ka5-b6 Kd6-d7 Kb6-b7 Kd7-d8
47/74 00:40 77,279k 1,905k +M41 Ne5-d3 Kd6-c7 Kf5-e6 Kc7-d8 Ke6-f7 Kd8-d7 Kf7-g6 Kd7-e7 Kg6-g7 Ke7-e8 Kg7-f6 Ke8-d8 Nd3-e5 Kd8-e8 Kf6-e6 Ke8-f8 Ne5-d3 Kf8-e8 Nd3-f4 Ke8-d8 Nf4-h5 Kd8-c7 Ke6-e7 Kc7-b6 Ke7-d6 Kb6-a5 Kd6-c5 Ka5-a6 Nh5-f4 Ka6-b7 Kc5-d6 Kb7-c8 Nf4-e6 Kc8-b7 Ne6-c5+ Kb7-c8 Kd6-e6 Kc8-d8 Ke6-f7 Kd8-c8 Kf7-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-b6 Ne6-f4 Kb6-b7 Kd6-d7 Kb7-b6 Nf4-d3 Kb6-b7 Kd7-d8
48/79 01:24 178,964k 2,106k +M44 Ne5-d3 Kd6-c7 Kf5-e6 Kc7-d8 Ke6-f7 Kd8-d7 Kf7-g6 Kd7-e7 Kg6-g7 Ke7-e8 Kg7-f6 Ke8-d8 Nd3-e5 Kd8-e8 Kf6-e6 Ke8-f8 Ne5-d3 Kf8-e8 Nd3-f4 Ke8-d8 Nf4-h5 Kd8-c7 Ke6-e7 Kc7-b6 Ke7-d6 Kb6-a5 Kd6-c5 Ka5-a6 Nh5-f4 Ka6-b7 Kc5-d6 Kb7-c8 Nf4-e6 Kc8-b7 Ne6-c5+ Kb7-c8 Kd6-e7 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-f7 Kc8-d8 Kf7-f8 Kd8-c8 Kf8-e8 Kc8-c7 Ke8-e7 Kc7-c8 Nc5-e6 Kc8-b7 Ke7-d6 Kb7-c8 Kd6-c6
49/78 01:58 259,497k 2,184k +152.65 Ne5-d3 Kd6-d7 Kf5-f6 Kd7-e8 Kf6-e6 Ke8-f8 Nd3-f4 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Ke7-d6 Kc8-d8 Nd3-e5 Kd8-e8 Kd6-e6 Ke8-f8 Ke6-d7 Kf8-g7 Kd7-e7 Kg7-h6 Ke7-f6 Kh6-h5 Kf6-f5 Kh5-h4 Kf5-g6 Kh4-g3 Kg6-g5 Kg3-f2 Kg5-f4 Kf2-e1 Kf4-e3 Ke1-d1 Ne5-d7 Kd1-c1 Nd7-c5 Kc1-d1 Nc5-a4 Kd1-c1 Ke3-d3
50/55 02:22 315,623k 2,218k +152.65 Ne5-d3 Kd6-d7 Kf5-f6 Kd7-e8 Kf6-e6 Ke8-f8 Nd3-f4 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Ke7-d6 Kc8-d8 Nd3-e5 Kd8-e8 Kd6-e6 Ke8-f8 Ke6-d7 Kf8-g7 Kd7-e7 Kg7-h6 Ke7-f6 Kh6-h5 Kf6-f5 Kh5-h4 Kf5-g6 Kh4-g3 Kg6-g5 Kg3-f2 Kg5-f4 Kf2-e1 Kf4-e3 Ke1-d1 Ne5-d7 Kd1-c1 Nd7-c5 Kc1-d1 Nc5-a4 Kd1-c1 Ke3-d3 Kc1-d1 Na4-b2+ Kd1-e1 Kd3-e3
51/82 02:54 395,110k 2,262k +152.65 Ne5-d3 Kd6-d7 Kf5-f6 Kd7-e8 Kf6-e6 Ke8-f8 Nd3-f4 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Nd3-c5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-d6 Kc8-d8 Nc5-d3 Kd8-e8 Nd3-e5 Ke8-d8 Ne5-f7+ Kd8-e8 Kd6-e6 Ke8-f8 Nf7-d6 Kf8-g7 Ke6-f5 Kg7-h6 Nd6-e8 Kh6-h5 Ne8-g7+ Kh5-h4 Kf5-f4 Kh4-h3 Ng7-f5 Kh3-g2 Nf5-e3+ Kg2-h3 Kf4-g5 Kh3-g3 Ne3-c2 Kg3-h3 Nc2-e1 Kh3-h2 Kg5-g4 Kh2-h1 Ne1-d3 Kh1-g1 Kg4-h3 Kg1-f1 Kh3-g3 Kf1-g1 Nd4-e2+ Kg1-f1
52/71 03:27 476,660k 2,294k +152.65 Ne5-d3 Kd6-d7 Kf5-f6 Kd7-e8 Kf6-e6 Ke8-f8 Nd3-f4 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-d6 Kf8-e8 Kd6-c7 Ke8-e7 Kc7-c8 Ke7-e6 Kc8-c7 Nd3-c5 Kc7-c8 Ke6-d6 Kc8-d8 Nc5-b7+ Kd8-e8 Kd6-e6 Ke8-f8 Nb7-d6 Kf8-g7 Ke6-f5 Kg7-h6 Nd6-e8 Kh6-h5 Ne8-g7+ Kh5-h4 Kf5-f4 Kh4-h3 Ng7-f5 Kh3-g2 Nf5-e3+ Kg2-h3 Kf4-g5 Kh3-g3 Ne3-c2 Kg3-h3 Nc2-e1 Kh3-g3 Ne1-d3 Kg3-g2 Kg5-h4 Kg2-h2 Nd3-f4 Kh2-h1 Kh4-h3 Kh1-g1 Kh3-g3 Kg1-f1 Nf4-d3 Kf1-g1 Nd4-e2+ Kg1-f1 Kg3-f3
53/70 04:07 575,151k 2,322k +152.65 Ne5-d3 Kd6-d7 Kf5-f6 Kd7-e8 Kf6-e6 Ke8-f8 Nd3-f4 Kf8-e8 Nf4-g6 Ke8-d8 Ke6-f7 Kd8-d7 Ng6-e5+ Kd7-d6 Ne5-d3 Kd6-d7 Kf7-f8 Kd7-c7 Kf8-e7 Kc7-c8 Nd3-e5 Kc8-c7 Ke7-e6 Kc7-c8 Ke6-d6 Kc8-d8 Ne5-f7+ Kd8-e8 Kd6-e6 Ke8-f8 Nf7-d6 Kf8-g7 Ke6-f5 Kg7-h6 Nd6-e8 Kh6-h5 Ne8-g7+ Kh5-h4 Kf5-f4 Kh4-h3 Ng7-f5 Kh3-g2 Nf5-e3+ Kg2-h3 Kf4-g5 Kh3-g3 Ne3-c2 Kg3-h3 Nc2-e1 Kh3-g3 Ne1-d3 Kg3-g2 Kg5-h4 Kg2-h2 Nd3-f4 Kh2-h1 Kh4-h3

[hgm]

These are 'over-the-horizon' mates, e.g. M47 at 44 ply (60 ply selective), while it would take 87 ply to reach the mate position. They are found by grafting scores from positions reached in few moves after sub-optimal defense onto lines that reached that position after many moves against optimal defense due to hash hits. This requires poor move ordering, which tend to be corrected in the next iteration, so that an overwritten hash entry would not be redone at the required depth to see the mate.

Not allowing hash cutoffs at the PV exacerbates this problem, as it makes sure that same line can no longer benefit from grafting. And it is not always certain an alternative way for forcing mate can be found.

[AndrewGrant]

Not allowing hash cutoffs at the PV exacerbates this problem, as it makes sure that same line can no longer benefit from grafting. And it is not always certain an alternative way for forcing mate can be found.

Very insightful. Thanks for this.