Dev Builds » 20260524-1218

Use this dev build

NCM plays each Stockfish dev build 20,000 times against Stockfish 15. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.

Summary

Host Duration Avg Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo
ncm-dbt-01 06:42:28 583333 4000 1799 300 1901 +136.87 ± 4.37 0 23 488 1456 33 +324.91 ± 15.42
ncm-dbt-02 06:43:23 585087 4000 1769 316 1915 +132.24 ± 4.37 0 22 530 1421 27 +310.35 ± 14.77
ncm-dbt-03 06:41:37 584652 4000 1813 337 1850 +134.55 ± 4.29 0 17 517 1439 27 +318.62 ± 14.94
ncm-dbt-04 06:43:29 566604 4000 1807 331 1862 +134.55 ± 4.4 0 17 529 1415 39 +314.27 ± 14.76
ncm-dbt-05 06:43:14 584155 4000 1773 333 1894 +130.94 ± 4.35 0 21 543 1411 25 +306.49 ± 14.58
20000 8961 1617 9422 +133.83 ± 1.95 0 100 2607 7142 151 +314.84 ± 6.65

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
470608 ncm-dbt-05 588132 500 229 38 233 +139.81 ± 11.62 0 1 60 186 3 +339.63 ± 44.35
470607 ncm-dbt-04 567799 500 228 37 235 +139.8 ± 11.62 0 0 63 183 4 +336.45 ± 43.03
470606 ncm-dbt-03 585211 500 219 42 239 +128.55 ± 13.01 0 6 64 177 3 +298.62 ± 43.1
470605 ncm-dbt-02 586520 500 217 36 247 +131.74 ± 11.94 0 1 70 176 3 +309.64 ± 40.79
470604 ncm-dbt-01 584327 500 220 41 239 +130.14 ± 12.59 0 5 63 180 2 +306.84 ± 43.45
470603 ncm-dbt-05 583321 500 228 44 228 +134.15 ± 13.05 0 6 58 182 4 +315.35 ± 45.33
470602 ncm-dbt-04 566138 500 226 44 230 +132.54 ± 11.91 0 1 69 177 3 +312.48 ± 41.11
470601 ncm-dbt-03 587367 500 227 43 230 +134.15 ± 12.06 0 3 62 183 2 +321.19 ± 43.77
470600 ncm-dbt-02 584579 500 221 40 239 +131.74 ± 12.54 0 4 64 179 3 +309.64 ± 43.08
470599 ncm-dbt-01 583908 500 228 31 241 +144.71 ± 11.83 0 1 56 188 5 +352.8 ± 46.04
470598 ncm-dbt-03 583405 500 230 49 221 +131.74 ± 12.14 0 2 68 177 3 +309.64 ± 41.56
470597 ncm-dbt-04 566257 500 229 55 216 +126.17 ± 12.68 0 4 71 172 3 +290.66 ± 40.76
470596 ncm-dbt-05 585590 500 225 39 236 +135.76 ± 11.8 0 1 65 181 3 +324.17 ± 42.47
470595 ncm-dbt-02 583908 500 217 46 237 +123.81 ± 12.35 0 3 75 170 2 +285.49 ± 39.5
470594 ncm-dbt-01 582152 500 230 44 226 +135.76 ± 13.01 0 6 56 184 4 +321.19 ± 46.14
470593 ncm-dbt-03 582485 500 223 44 233 +130.14 ± 12.19 0 4 64 181 1 +309.64 ± 43.08
470592 ncm-dbt-04 566533 500 227 43 230 +134.15 ± 12.27 0 2 66 178 4 +315.35 ± 42.24
470591 ncm-dbt-05 586435 500 226 31 243 +143.07 ± 11.01 0 0 57 191 2 +356.21 ± 45.43
470590 ncm-dbt-01 583782 500 226 34 240 +140.62 ± 12.02 0 2 58 186 4 +339.63 ± 45.29
470589 ncm-dbt-02 583614 500 223 45 232 +129.35 ± 12.21 0 2 71 174 3 +301.33 ± 40.6
470588 ncm-dbt-03 585590 500 228 37 235 +139.8 ± 11.18 0 0 61 187 2 +342.85 ± 43.79
470587 ncm-dbt-04 563744 500 224 35 241 +138.18 ± 12.73 0 2 64 177 7 +321.19 ± 42.95
470586 ncm-dbt-05 579496 500 216 51 233 +119.11 ± 12.99 0 3 84 158 5 +263.42 ± 37.11
470585 ncm-dbt-02 583782 500 226 45 229 +131.74 ± 13.3 0 4 68 171 7 +298.62 ± 41.71
470584 ncm-dbt-01 581860 500 217 40 243 +128.55 ± 12.24 0 1 75 170 4 +295.94 ± 39.27
470583 ncm-dbt-03 585843 500 227 41 232 +135.76 ± 12.42 0 2 65 178 5 +318.25 ± 42.59
470582 ncm-dbt-04 566217 500 231 32 237 +146.36 ± 13.22 0 3 55 182 10 +342.85 ± 46.64
470581 ncm-dbt-01 582736 500 227 29 244 +145.54 ± 12.43 0 2 55 186 7 +349.43 ± 46.59
470580 ncm-dbt-05 583656 500 214 45 241 +122.24 ± 12.76 0 5 73 170 2 +280.42 ± 40.21
470579 ncm-dbt-02 584243 500 226 34 240 +140.62 ± 12.44 0 2 60 182 6 +333.32 ± 44.47
470447 ncm-dbt-02 587452 500 229 34 237 +143.07 ± 11.24 0 1 55 192 2 +356.21 ± 46.49
470446 ncm-dbt-04 564919 500 217 45 238 +124.6 ± 12.33 0 3 74 171 2 +288.06 ± 39.79
470445 ncm-dbt-03 584916 500 223 32 245 +139.8 ± 11.84 0 0 64 181 5 +333.32 ± 42.66
470444 ncm-dbt-05 585000 500 217 37 246 +130.94 ± 12.56 0 2 71 172 5 +301.33 ± 40.6
470443 ncm-dbt-01 582652 500 228 40 232 +137.37 ± 12.96 0 4 60 180 6 +321.19 ± 44.57
470442 ncm-dbt-02 586604 500 210 36 254 +126.17 ± 12.49 0 5 67 177 1 +295.94 ± 42.08
470441 ncm-dbt-01 585253 500 223 41 236 +132.54 ± 11.7 0 2 65 182 1 +318.25 ± 42.59
470440 ncm-dbt-03 582402 500 236 49 215 +136.56 ± 12.18 0 0 69 175 6 +318.25 ± 40.94
470439 ncm-dbt-04 571230 500 225 40 235 +134.95 ± 12.64 0 2 67 175 6 +312.48 ± 41.9
470438 ncm-dbt-05 581610 500 218 48 234 +123.02 ± 12.17 0 3 75 171 1 +285.49 ± 39.5

Commit

Commit ID 24d639849017e61c98e6eea40e6a38af302a0080
Author Disservin
Date 2026-05-24 12:18:45 UTC
Move Attacks out of Bitboard File Over the past few months our attacks and bitboard logic got a bit more involved and target specific, so I think it makes sense to split this up a bit more into separate files. While it's not in an ideal state I think it's first step and can be improved later, `pawn_attacks_bb` could also be moved into the attacks.h but this was more of an oversight from my side. closes https://github.com/official-stockfish/Stockfish/pull/6833 No functional change
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