Dev Builds » 20251223-2042

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 06:42:26 580379 4000 1708 390 1902 +118.92 ± 4.59 0 42 620 1316 22 +268.17 ± 13.66
ncm-dbt-02 06:43:20 585454 4000 1712 367 1921 +121.55 ± 4.67 1 33 626 1300 40 +271.18 ± 13.57
ncm-dbt-03 06:41:54 584655 4000 1715 400 1885 +118.62 ± 4.67 0 40 639 1287 34 +263.71 ± 13.44
ncm-dbt-04 06:42:17 568014 4000 1756 390 1854 +123.61 ± 4.59 0 34 599 1334 33 +279.48 ± 13.89
ncm-dbt-05 06:44:21 582320 4000 1730 403 1867 +119.79 ± 4.61 1 42 608 1327 22 +271.18 ± 13.8
20000 8621 1950 9429 +120.5 ± 2.07 2 191 3092 6564 151 +270.69 ± 6.11

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
446966 ncm-dbt-05 584832 500 207 50 243 +112.91 ± 12.86 0 6 82 161 1 +254.16 ± 37.82
446965 ncm-dbt-03 586731 500 210 48 242 +116.77 ± 13.01 0 5 81 161 3 +261.07 ± 38.02
446964 ncm-dbt-02 584790 500 219 48 233 +123.81 ± 12.92 0 2 81 161 6 +275.45 ± 37.75
446963 ncm-dbt-04 570188 500 227 35 238 +140.62 ± 12.02 0 1 61 183 5 +336.46 ± 43.96
446962 ncm-dbt-01 581236 500 213 53 234 +115.22 ± 13.38 0 5 85 155 5 +251.89 ± 37.03
446961 ncm-dbt-05 577684 500 210 58 232 +109.07 ± 13.23 0 9 80 161 0 +245.2 ± 38.39
446960 ncm-dbt-02 586604 500 208 46 246 +116.77 ± 13.36 0 5 83 157 5 +256.44 ± 37.51
446959 ncm-dbt-04 567640 500 212 58 230 +110.6 ± 12.34 0 3 91 155 1 +247.41 ± 35.47
446958 ncm-dbt-03 584285 500 225 51 224 +126.17 ± 12.87 0 4 72 170 4 +288.06 ± 40.46
446957 ncm-dbt-01 581070 500 206 44 250 +116.77 ± 13.19 0 6 79 162 3 +261.07 ± 38.58
446956 ncm-dbt-05 585337 500 214 44 242 +123.02 ± 13.47 1 5 70 171 3 +282.94 ± 41.13
446955 ncm-dbt-02 585421 500 221 52 227 +122.24 ± 13.3 0 5 76 164 5 +273.0 ± 39.35
446954 ncm-dbt-04 567878 500 218 42 240 +127.76 ± 13.02 0 3 74 167 6 +288.06 ± 39.79
446953 ncm-dbt-01 583154 500 211 43 246 +121.45 ± 12.4 0 4 75 170 1 +280.42 ± 39.57
446952 ncm-dbt-03 582903 500 214 52 234 +116.77 ± 13.01 0 4 84 158 4 +258.75 ± 37.2
446951 ncm-dbt-05 579661 500 220 47 233 +125.38 ± 12.89 0 4 73 169 4 +285.49 ± 40.16
446950 ncm-dbt-01 580406 500 216 52 232 +118.33 ± 12.81 0 5 78 165 2 +268.17 ± 38.8
446949 ncm-dbt-02 586774 500 208 35 257 +125.38 ± 12.51 0 1 80 164 5 +282.94 ± 37.88
446948 ncm-dbt-03 585295 500 215 50 235 +119.11 ± 12.8 0 4 80 163 3 +268.17 ± 38.21
446947 ncm-dbt-04 567126 500 223 55 222 +121.45 ± 12.77 0 4 77 166 3 +275.45 ± 39.01
446946 ncm-dbt-05 583237 500 231 42 227 +138.18 ± 12.53 0 2 63 179 6 +324.17 ± 43.32
446945 ncm-dbt-04 568752 500 217 53 230 +118.33 ± 12.81 0 3 84 159 4 +263.42 ± 37.11
446944 ncm-dbt-03 584117 500 213 47 240 +119.89 ± 13.33 0 5 79 161 5 +265.78 ± 38.54
446943 ncm-dbt-02 584117 500 221 55 224 +119.89 ± 13.85 0 6 79 158 7 +261.07 ± 38.58
446942 ncm-dbt-01 578465 500 206 53 241 +109.83 ± 12.88 0 5 89 154 2 +243.0 ± 36.1
446941 ncm-dbt-05 579951 500 220 47 233 +125.38 ± 12.89 0 6 67 175 2 +290.66 ± 42.08
446940 ncm-dbt-04 568275 500 216 47 237 +122.24 ± 13.66 0 6 75 163 6 +270.57 ± 39.67
446939 ncm-dbt-02 584327 500 215 51 234 +118.33 ± 13.86 1 6 75 164 4 +265.78 ± 39.69
446938 ncm-dbt-03 583489 500 200 50 250 +107.54 ± 13.4 0 8 86 154 2 +236.51 ± 36.93
446937 ncm-dbt-01 581070 500 217 47 236 +123.02 ± 13.11 0 6 71 170 3 +280.42 ± 40.83
446936 ncm-dbt-05 583237 500 213 63 224 +107.54 ± 12.88 0 5 92 151 2 +236.51 ± 35.43
446935 ncm-dbt-04 566257 500 224 50 226 +126.17 ± 13.24 0 7 65 175 3 +290.66 ± 42.73
446934 ncm-dbt-02 585253 500 207 35 258 +124.6 ± 12.9 0 5 71 171 3 +285.49 ± 40.81
446933 ncm-dbt-03 584874 500 221 45 234 +127.76 ± 13.75 0 4 75 162 9 +280.42 ± 39.57
446932 ncm-dbt-01 579785 500 218 49 233 +122.24 ± 12.94 0 5 74 168 3 +277.93 ± 39.92
446931 ncm-dbt-03 585548 500 217 57 226 +115.22 ± 13.38 0 6 82 158 4 +254.16 ± 37.82
446930 ncm-dbt-04 567997 500 219 50 231 +122.24 ± 13.66 0 7 72 166 5 +273.0 ± 40.54
446929 ncm-dbt-05 584622 500 215 52 233 +117.55 ± 13.18 0 5 81 160 4 +261.07 ± 38.02
446928 ncm-dbt-01 577848 500 221 49 230 +124.6 ± 13.09 0 6 69 172 3 +285.49 ± 41.44
446927 ncm-dbt-02 586350 500 213 45 242 +121.45 ± 12.95 0 3 81 161 5 +270.57 ± 37.86

Commit

Commit ID 4d4c6ebd0255f29a45fb5e071fc7471ab0adf316
Author FauziAkram
Date 2025-12-23 20:42:45 UTC
Simplify doDeeperSearch formula Passed STC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 211776 W: 54939 L: 54911 D: 101926 Ptnml(0-2): 714, 24971, 54484, 25011, 708 https://tests.stockfishchess.org/tests/view/6938971875b70713ef796b70 Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 216774 W: 55346 L: 55326 D: 106102 Ptnml(0-2): 105, 23599, 60980, 23577, 126 https://tests.stockfishchess.org/tests/view/693fc91f46f342e1ec20f9f6 closes https://github.com/official-stockfish/Stockfish/pull/6486 Bench: 3267755
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