Dev Builds » 20260426-0737

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 06:42:49 582965 4016 1707 417 1892 +115.7 ± 4.61 0 42 658 1284 24 +257.87 ± 13.24
ncm-dbt-02 06:41:36 585837 4000 1687 381 1932 +117.75 ± 4.68 2 44 625 1304 25 +264.3 ± 13.61
ncm-dbt-03 06:40:56 584508 4000 1725 382 1893 +121.36 ± 4.66 0 39 614 1312 35 +271.78 ± 13.72
ncm-dbt-04 06:41:44 567341 4000 1725 404 1871 +119.21 ± 4.58 0 35 637 1300 28 +267.27 ± 13.45
ncm-dbt-05 06:42:36 582833 3984 1703 384 1897 +119.53 ± 4.48 0 32 626 1317 17 +271.55 ± 13.56
20000 8547 1968 9485 +118.7 ± 2.06 2 192 3160 6517 129 +266.49 ± 6.04

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
466070 ncm-dbt-01 584874 16 7 2 7 +112.26 ± 65.75 0 0 3 5 0 +254.61 ± 287.37
466069 ncm-dbt-05 579124 484 213 48 223 +123.38 ± 13.38 0 5 71 162 4 +278.73 ± 40.78
466068 ncm-dbt-04 567601 500 212 48 240 +118.33 ± 12.26 0 2 84 162 2 +268.17 ± 36.99
466067 ncm-dbt-03 584034 500 216 52 232 +118.33 ± 13.0 0 4 82 160 4 +263.42 ± 37.69
466066 ncm-dbt-02 584369 500 208 39 253 +122.24 ± 12.76 1 2 76 169 2 +282.94 ± 39.21
466065 ncm-dbt-01 583363 500 212 60 228 +109.07 ± 13.56 0 7 88 151 4 +236.51 ± 36.44
466064 ncm-dbt-05 580572 500 204 53 243 +108.3 ± 12.88 0 5 91 152 2 +238.66 ± 35.65
466063 ncm-dbt-03 587070 500 215 45 240 +123.02 ± 12.93 0 7 67 175 1 +285.49 ± 42.08
466062 ncm-dbt-04 566691 500 218 53 229 +119.11 ± 12.43 0 2 84 161 3 +268.17 ± 36.99
466061 ncm-dbt-02 585253 500 213 42 245 +123.81 ± 13.81 0 4 80 157 9 +268.17 ± 38.21
466060 ncm-dbt-01 582485 500 211 42 247 +122.24 ± 13.12 0 5 75 166 4 +275.45 ± 39.63
466059 ncm-dbt-05 580987 500 223 47 230 +127.76 ± 12.06 0 4 66 180 0 +304.07 ± 42.38
466058 ncm-dbt-03 583824 500 205 54 241 +108.3 ± 13.56 0 8 86 153 3 +236.51 ± 36.93
466057 ncm-dbt-04 564919 500 209 54 237 +111.37 ± 14.38 0 13 72 162 3 +245.2 ± 40.36
466056 ncm-dbt-01 581485 500 198 49 253 +106.77 ± 13.56 0 9 85 154 2 +234.38 ± 37.19
466055 ncm-dbt-02 584117 500 211 50 239 +116.0 ± 13.19 1 5 77 166 1 +265.78 ± 39.12
466054 ncm-dbt-05 583908 500 211 53 236 +113.68 ± 13.21 0 6 83 158 3 +251.89 ± 37.57
466053 ncm-dbt-03 582945 500 215 36 249 +130.14 ± 12.39 0 2 71 173 4 +301.33 ± 40.6
466052 ncm-dbt-04 566572 500 213 52 235 +116.0 ± 13.2 0 4 86 155 5 +254.16 ± 36.71
466051 ncm-dbt-02 588643 500 214 53 233 +116.0 ± 13.2 0 6 80 161 3 +258.75 ± 38.32
466050 ncm-dbt-01 582778 500 208 49 243 +114.45 ± 12.85 0 5 83 160 2 +256.44 ± 37.51
466049 ncm-dbt-05 582861 500 213 46 241 +120.67 ± 12.6 0 3 80 164 3 +273.0 ± 38.12
466048 ncm-dbt-03 584832 500 224 44 232 +130.94 ± 12.95 0 1 76 165 8 +293.29 ± 38.98
466047 ncm-dbt-04 567918 500 212 53 235 +114.45 ± 12.85 0 6 80 163 1 +258.75 ± 38.32
466046 ncm-dbt-02 586435 500 215 49 236 +119.89 ± 13.33 0 8 70 170 2 +273.0 ± 41.13
466045 ncm-dbt-01 581319 500 225 58 217 +120.67 ± 12.41 0 3 79 166 2 +275.45 ± 38.39
466044 ncm-dbt-03 584076 500 215 53 232 +116.77 ± 13.19 0 7 76 165 2 +263.42 ± 39.41
466043 ncm-dbt-05 586054 500 218 40 242 +129.35 ± 12.01 0 2 70 176 2 +304.07 ± 40.91
466042 ncm-dbt-01 582694 500 207 52 241 +111.37 ± 12.69 0 4 89 155 2 +247.41 ± 36.02
466041 ncm-dbt-04 567324 500 217 40 243 +128.55 ± 13.19 0 4 71 169 6 +290.66 ± 40.76
466040 ncm-dbt-02 583866 500 205 52 243 +109.83 ± 13.23 0 7 85 156 2 +243.0 ± 37.13
466039 ncm-dbt-03 585464 500 225 45 230 +130.94 ± 13.69 0 4 71 166 9 +290.66 ± 40.76
466038 ncm-dbt-05 580987 500 215 49 236 +119.89 ± 12.98 0 5 77 165 3 +270.57 ± 39.07
466037 ncm-dbt-01 583321 500 218 50 232 +121.45 ± 13.31 0 5 77 163 5 +270.57 ± 39.07
466036 ncm-dbt-04 568514 500 221 54 225 +120.67 ± 12.78 0 2 84 159 5 +268.17 ± 36.99
466035 ncm-dbt-02 586858 500 212 50 238 +116.77 ± 13.01 0 5 81 161 3 +261.07 ± 38.02
466034 ncm-dbt-03 583824 500 210 53 237 +112.91 ± 13.39 0 6 85 155 4 +247.41 ± 37.09
466033 ncm-dbt-04 569190 500 223 50 227 +125.38 ± 12.32 0 2 76 169 3 +288.06 ± 39.11
466032 ncm-dbt-05 588174 500 206 48 246 +113.68 ± 11.93 0 2 88 160 0 +258.75 ± 36.04
466031 ncm-dbt-01 584369 500 221 55 224 +119.89 ± 12.79 0 4 79 164 3 +270.57 ± 38.47
466030 ncm-dbt-02 587155 500 209 46 245 +117.55 ± 13.36 0 7 76 164 3 +263.42 ± 39.41

Commit

Commit ID 692d90bd7499d0d3e32f610e71fac282dbd1d1b2
Author mstembera
Date 2026-04-26 07:37:18 UTC
Simplify FullThreats::append_active_indices() Also add an else to FullThreats::append_changed_indices() because dp2removed can't be equal to both from and to simultaneously. passed STC https://tests.stockfishchess.org/tests/view/69e71a490e9667dd5a76549f LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 210688 W: 54362 L: 54335 D: 101991 Ptnml(0-2): 613, 23246, 57593, 23285, 607 Thanks to ces42 for an improvement suggestion. closes https://github.com/official-stockfish/Stockfish/pull/6770 No functional change
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