Dev Builds » 20260213-0622

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 06:45:23 583230 4014 1735 357 1922 +124.32 ± 4.58 0 34 595 1344 34 +281.46 ± 13.94
ncm-dbt-02 06:43:38 586962 3996 1714 392 1890 +119.43 ± 4.67 0 43 621 1303 31 +267.06 ± 13.65
ncm-dbt-03 06:45:04 585423 4004 1744 370 1890 +124.27 ± 4.63 0 35 596 1333 38 +280.0 ± 13.93
ncm-dbt-04 06:44:01 567023 4000 1726 388 1886 +120.87 ± 4.58 1 31 627 1311 30 +272.09 ± 13.55
ncm-dbt-05 06:43:21 581350 3986 1723 378 1885 +122.02 ± 4.54 0 35 602 1332 24 +277.19 ± 13.85
20000 8642 1885 9473 +122.18 ± 2.06 1 178 3041 6623 157 +275.51 ± 6.16

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
454829 ncm-dbt-03 585042 4 2 1 1 +88.51 ± 137.63 0 0 1 1 0 +190.5 ± 634.21
454828 ncm-dbt-01 584411 14 7 1 6 +159.07 ± 56.3 0 0 1 6 0 +445.23 ± 480.27
454827 ncm-dbt-05 583321 486 204 58 224 +107.69 ± 12.92 0 4 91 146 2 +236.83 ± 35.52
454826 ncm-dbt-02 587155 496 220 49 227 +124.89 ± 13.69 0 3 80 156 9 +271.31 ± 38.11
454825 ncm-dbt-04 566770 500 211 53 236 +113.68 ± 12.68 0 5 83 161 1 +256.44 ± 37.51
454824 ncm-dbt-03 585126 500 213 36 251 +128.55 ± 13.01 0 5 67 174 4 +295.94 ± 42.08
454823 ncm-dbt-01 583908 500 219 48 233 +123.81 ± 13.28 0 7 68 172 3 +282.94 ± 41.76
454822 ncm-dbt-05 582068 500 217 41 242 +127.76 ± 12.45 0 2 74 170 4 +293.29 ± 39.69
454821 ncm-dbt-02 586943 500 213 50 237 +117.55 ± 13.53 0 7 77 162 4 +261.07 ± 39.14
454820 ncm-dbt-04 566414 500 220 45 235 +126.97 ± 13.22 0 5 70 170 5 +288.06 ± 41.11
454819 ncm-dbt-03 585084 500 215 43 242 +124.6 ± 13.62 0 6 72 166 6 +277.93 ± 40.53
454818 ncm-dbt-01 581902 500 209 48 243 +116.0 ± 13.54 0 6 82 157 5 +254.16 ± 37.82
454817 ncm-dbt-05 577889 500 220 50 230 +123.02 ± 12.74 0 4 75 168 3 +280.42 ± 39.57
454816 ncm-dbt-02 587877 500 210 53 237 +112.91 ± 12.86 0 4 88 155 3 +249.64 ± 36.24
454815 ncm-dbt-04 568872 500 220 45 235 +126.97 ± 12.28 0 3 71 174 2 +295.94 ± 40.69
454814 ncm-dbt-03 583112 500 214 52 234 +116.77 ± 13.36 0 6 80 160 4 +258.75 ± 38.32
454813 ncm-dbt-01 585211 500 211 42 247 +122.24 ± 13.48 0 6 74 165 5 +273.0 ± 39.95
454812 ncm-dbt-05 582485 500 210 46 244 +118.33 ± 13.0 0 6 76 166 2 +268.17 ± 39.39
454811 ncm-dbt-02 587113 500 206 48 246 +113.68 ± 13.72 0 8 80 158 4 +249.64 ± 38.38
454810 ncm-dbt-04 567640 500 219 50 231 +122.24 ± 12.76 0 1 85 158 6 +270.57 ± 36.61
454809 ncm-dbt-03 586223 500 222 53 225 +122.24 ± 12.38 0 2 80 165 3 +277.93 ± 38.02
454808 ncm-dbt-01 582068 500 210 38 252 +124.6 ± 12.53 0 1 81 163 5 +280.42 ± 37.62
454807 ncm-dbt-02 586054 500 217 52 231 +119.11 ± 13.69 0 9 70 168 3 +268.17 ± 41.1
454806 ncm-dbt-05 580447 500 214 46 240 +121.45 ± 12.58 0 4 76 168 2 +277.93 ± 39.29
454805 ncm-dbt-04 567007 500 202 51 247 +108.3 ± 13.73 1 6 87 153 3 +238.66 ± 36.67
454804 ncm-dbt-03 585000 500 217 46 237 +123.81 ± 13.63 0 8 67 171 4 +280.42 ± 42.05
454803 ncm-dbt-01 585674 500 224 46 230 +129.35 ± 12.01 0 1 73 173 3 +301.33 ± 39.86
454802 ncm-dbt-05 579124 500 218 46 236 +124.6 ± 12.53 0 5 69 175 1 +290.66 ± 41.43
454801 ncm-dbt-02 583950 500 214 53 233 +116.0 ± 11.9 0 1 88 160 1 +263.42 ± 35.9
454800 ncm-dbt-04 568355 500 223 47 230 +127.76 ± 12.45 0 3 71 173 3 +295.94 ± 40.69
454799 ncm-dbt-03 586731 500 219 47 234 +124.6 ± 13.62 0 5 75 163 7 +275.45 ± 39.63
454798 ncm-dbt-01 582193 500 226 45 229 +131.74 ± 12.54 0 2 70 173 5 +304.07 ± 40.91
454797 ncm-dbt-05 582945 500 225 48 227 +128.55 ± 13.01 0 4 70 171 5 +293.29 ± 41.07
454796 ncm-dbt-02 589625 500 220 49 231 +123.81 ± 12.92 0 5 72 170 3 +282.94 ± 40.5
454795 ncm-dbt-04 568514 500 213 48 239 +119.11 ± 13.52 0 6 78 161 5 +263.42 ± 38.85
454794 ncm-dbt-01 579083 500 219 40 241 +130.14 ± 12.19 0 2 70 175 3 +304.07 ± 40.91
454793 ncm-dbt-03 585759 500 227 47 226 +130.94 ± 13.14 0 1 77 163 9 +290.66 ± 38.7
454792 ncm-dbt-05 582527 500 215 43 242 +124.6 ± 13.45 0 6 71 168 5 +280.42 ± 40.83
454791 ncm-dbt-02 586985 500 214 38 248 +127.76 ± 13.21 0 6 66 174 4 +293.29 ± 42.41
454790 ncm-dbt-04 562612 500 218 49 233 +122.24 ± 12.76 0 2 82 161 5 +273.0 ± 37.5
454789 ncm-dbt-03 586731 500 215 45 240 +123.02 ± 11.98 0 2 77 170 1 +285.49 ± 38.83
454788 ncm-dbt-01 584622 500 210 49 241 +116.0 ± 14.05 0 9 76 160 5 +254.16 ± 39.42

Commit

Commit ID 77d46ff61c3e33f7e9c1ef1f1b48315f23b04e80
Author Daniel Monroe
Date 2026-02-13 06:22:36 UTC
Simplify probCutDepth term Passed STC LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 139392 W: 36003 L: 35897 D: 67492 Ptnml(0-2): 451, 16383, 35911, 16511, 440 https://tests.stockfishchess.org/tests/view/697ebb4d5f56030af97b5aa5 Passed LTC LLR: 2.97 (-2.94,2.94) <-1.75,0.25> Total: 266934 W: 67822 L: 67851 D: 131261 Ptnml(0-2): 175, 29579, 73955, 29616, 142 https://tests.stockfishchess.org/tests/view/6980e5a26362aee5c8a55398 closes https://github.com/official-stockfish/Stockfish/pull/6607 Bench: 2515956
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