Dev Builds » 20260318-1949

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 06:40:43 583092 4000 1734 381 1885 +122.34 ± 4.6 0 34 612 1321 33 +275.45 ± 13.73
ncm-dbt-02 06:42:20 585123 4014 1737 378 1899 +122.46 ± 4.57 0 31 620 1322 34 +275.57 ± 13.63
ncm-dbt-03 06:42:19 584456 4016 1742 371 1903 +123.57 ± 4.51 0 33 596 1354 25 +281.88 ± 13.92
ncm-dbt-04 06:41:32 567291 4000 1741 366 1893 +124.5 ± 4.52 0 26 606 1335 33 +282.31 ± 13.78
ncm-dbt-05 06:41:30 580480 3970 1689 366 1915 +120.38 ± 4.67 1 41 605 1310 28 +271.11 ± 13.83
20000 8643 1862 9495 +122.65 ± 2.04 1 165 3039 6642 153 +277.24 ± 6.16

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
460252 ncm-dbt-02 585674 14 7 3 4 +102.04 ± 70.73 0 0 3 4 0 +225.59 ± 263.0
460251 ncm-dbt-03 583321 16 6 0 10 +136.89 ± 61.78 0 0 2 6 0 +337.87 ± 515.83
460250 ncm-dbt-05 580862 470 200 46 224 +118.2 ± 13.1 0 4 75 154 2 +267.45 ± 39.51
460249 ncm-dbt-04 567918 500 220 31 249 +138.18 ± 12.33 0 3 59 184 4 +330.23 ± 44.94
460248 ncm-dbt-01 584201 500 223 55 222 +121.45 ± 13.66 0 5 79 159 7 +265.78 ± 38.54
460247 ncm-dbt-02 585084 500 216 46 238 +123.02 ± 12.74 0 5 72 171 2 +282.94 ± 40.5
460246 ncm-dbt-03 583656 500 219 56 225 +117.55 ± 12.64 0 3 84 160 3 +263.42 ± 37.11
460245 ncm-dbt-05 581319 500 216 41 243 +126.97 ± 12.47 0 3 72 172 3 +293.29 ± 40.39
460244 ncm-dbt-01 583154 500 213 39 248 +126.17 ± 13.6 0 7 67 171 5 +285.49 ± 42.08
460243 ncm-dbt-04 567244 500 207 54 239 +109.83 ± 13.23 0 5 91 150 4 +238.66 ± 35.65
460242 ncm-dbt-02 585590 500 222 52 226 +123.02 ± 12.56 0 1 83 161 5 +275.45 ± 37.11
460241 ncm-dbt-03 585464 500 218 35 247 +133.34 ± 12.69 0 2 69 173 6 +306.84 ± 41.23
460240 ncm-dbt-05 578342 500 208 55 237 +109.83 ± 13.89 0 8 86 151 5 +236.51 ± 36.93
460239 ncm-dbt-01 584537 500 221 50 229 +123.81 ± 12.54 0 2 79 165 4 +280.42 ± 38.28
460238 ncm-dbt-04 569949 500 229 48 223 +131.74 ± 13.12 0 1 76 164 9 +293.29 ± 38.98
460237 ncm-dbt-02 585337 500 215 43 242 +124.6 ± 12.9 0 3 77 165 5 +280.42 ± 38.93
460236 ncm-dbt-03 585717 500 211 55 234 +112.14 ± 12.87 0 6 83 160 1 +251.89 ± 37.57
460235 ncm-dbt-05 577971 500 208 37 255 +123.81 ± 12.16 0 3 74 172 1 +288.06 ± 39.79
460234 ncm-dbt-01 581818 500 220 48 232 +124.6 ± 12.53 0 3 75 169 3 +285.49 ± 39.5
460233 ncm-dbt-04 566612 500 216 57 227 +114.45 ± 12.67 0 3 88 156 3 +254.16 ± 36.15
460232 ncm-dbt-02 584790 500 213 43 244 +123.02 ± 12.93 0 5 73 169 3 +280.42 ± 40.21
460231 ncm-dbt-03 583572 500 223 42 235 +131.74 ± 12.93 0 5 63 178 4 +306.84 ± 43.45
460230 ncm-dbt-05 581735 500 215 40 245 +126.97 ± 13.58 1 3 72 168 6 +288.06 ± 40.46
460229 ncm-dbt-01 583028 500 218 45 237 +125.38 ± 13.43 0 7 67 172 4 +285.49 ± 42.08
460228 ncm-dbt-04 567442 500 224 49 227 +126.97 ± 12.85 0 4 71 171 4 +290.66 ± 40.76
460227 ncm-dbt-02 587367 500 213 61 226 +109.07 ± 13.05 0 4 94 148 4 +236.51 ± 34.92
460226 ncm-dbt-03 586223 500 210 37 253 +125.38 ± 12.7 0 5 69 174 2 +290.66 ± 41.43
460225 ncm-dbt-05 583489 500 220 57 223 +117.55 ± 14.04 0 9 74 162 5 +258.75 ± 39.96
460224 ncm-dbt-04 566533 500 224 39 237 +134.95 ± 11.61 0 2 62 185 1 +327.18 ± 43.69
460223 ncm-dbt-01 583782 500 223 54 223 +122.24 ± 12.19 0 1 82 164 3 +277.93 ± 37.36
460222 ncm-dbt-02 583572 500 219 47 234 +124.6 ± 13.27 0 4 76 164 6 +277.93 ± 39.29
460221 ncm-dbt-03 586097 500 216 41 243 +126.97 ± 12.08 0 2 73 173 2 +295.94 ± 39.99
460220 ncm-dbt-05 576088 500 210 40 250 +123.02 ± 13.11 0 5 74 167 4 +277.93 ± 39.92
460219 ncm-dbt-01 582527 500 204 41 255 +117.55 ± 13.18 0 7 75 166 2 +265.78 ± 39.69
460218 ncm-dbt-04 566414 500 214 44 242 +123.02 ± 12.74 0 4 75 168 3 +280.42 ± 39.57
460217 ncm-dbt-02 584117 500 215 45 240 +123.02 ± 13.11 0 4 77 164 5 +275.45 ± 39.01
460216 ncm-dbt-03 583279 500 219 57 224 +116.77 ± 13.36 0 6 80 160 4 +258.75 ± 38.32
460215 ncm-dbt-05 584034 500 212 50 238 +116.77 ± 13.01 0 6 78 164 2 +263.42 ± 38.85
460214 ncm-dbt-03 582778 500 220 48 232 +124.6 ± 12.71 0 4 73 170 3 +285.49 ± 40.16
460213 ncm-dbt-04 566217 500 207 44 249 +117.55 ± 13.18 0 4 84 157 5 +258.75 ± 37.2
460212 ncm-dbt-02 584579 500 217 38 245 +130.14 ± 12.97 0 5 65 176 4 +301.33 ± 42.75
460211 ncm-dbt-01 581693 500 212 49 239 +117.55 ± 12.82 0 2 88 155 5 +258.75 ± 36.04

Commit

Commit ID 8b499683863640c8359a9d853176761a7dc0c09f
Author Ryan Hirsch
Date 2026-03-18 19:49:06 UTC
Speed up update_accumulator_refresh_cache with AVX512ICL Passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 212960 W: 55550 L: 54991 D: 102419 Ptnml(0-2): 583, 23688, 57393, 24219, 597 https://tests.stockfishchess.org/tests/view/69ab916ccb31ee884aed62ea closes https://github.com/official-stockfish/Stockfish/pull/6657 No functional change
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