Dev Builds » 20260519-1642

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 06:44:05 582599 4004 1792 324 1888 +133.6 ± 4.42 0 22 525 1420 35 +312.33 ± 14.84
ncm-dbt-02 06:45:27 585749 4014 1787 292 1935 +135.94 ± 4.4 0 25 496 1452 34 +321.15 ± 15.29
ncm-dbt-03 06:42:09 585511 4000 1798 308 1894 +135.96 ± 4.46 0 25 499 1437 39 +319.35 ± 15.25
ncm-dbt-04 06:43:48 567701 4000 1768 319 1913 +131.84 ± 4.41 0 25 530 1416 29 +308.24 ± 14.78
ncm-dbt-05 06:44:35 583371 3982 1776 322 1884 +133.0 ± 4.4 0 21 526 1413 31 +311.57 ± 14.82
20000 8921 1565 9514 +134.07 ± 1.98 0 118 2576 7138 168 +314.48 ± 6.7

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
469598 ncm-dbt-01 585295 4 2 0 2 +190.27 ± 27.79 0 0 0 2 0 +1199.83 ± 312.71
469597 ncm-dbt-02 586223 14 7 3 4 +102.04 ± 70.73 0 0 3 4 0 +225.59 ± 263.0
469596 ncm-dbt-05 582360 482 217 33 232 +139.7 ± 13.19 0 3 58 173 7 +326.0 ± 45.33
469595 ncm-dbt-04 567839 500 210 37 253 +125.38 ± 11.72 0 1 76 172 1 +293.29 ± 38.98
469594 ncm-dbt-03 585253 500 228 28 244 +147.19 ± 11.92 0 2 51 192 5 +363.2 ± 48.51
469593 ncm-dbt-02 587028 500 228 42 230 +135.76 ± 12.81 0 6 55 186 3 +324.17 ± 46.56
469592 ncm-dbt-01 580323 500 218 41 241 +128.55 ± 12.82 0 4 69 173 4 +295.94 ± 41.39
469591 ncm-dbt-05 585211 500 227 51 222 +127.76 ± 12.84 0 4 70 172 4 +293.29 ± 41.07
469590 ncm-dbt-04 568236 500 215 39 246 +127.76 ± 12.84 0 6 64 178 2 +298.62 ± 43.1
469589 ncm-dbt-03 586012 500 215 36 249 +130.14 ± 11.99 0 3 66 180 1 +309.64 ± 42.33
469588 ncm-dbt-02 585801 500 219 30 251 +138.18 ± 13.12 0 5 57 182 6 +324.17 ± 45.77
469587 ncm-dbt-01 582402 500 220 39 241 +131.74 ± 11.94 0 1 70 176 3 +309.64 ± 40.79
469586 ncm-dbt-05 580738 500 219 40 241 +130.14 ± 12.39 0 4 65 179 2 +306.84 ± 42.73
469585 ncm-dbt-04 566414 500 221 38 241 +133.34 ± 12.29 0 2 67 177 4 +312.48 ± 41.9
469584 ncm-dbt-03 585674 500 226 43 231 +133.34 ± 12.49 0 3 65 178 4 +312.48 ± 42.67
469583 ncm-dbt-01 584664 500 225 43 232 +132.54 ± 12.32 0 3 65 179 3 +312.48 ± 42.67
469582 ncm-dbt-02 585421 500 227 35 238 +140.62 ± 12.44 0 5 51 191 3 +342.85 ± 48.46
469581 ncm-dbt-05 586054 500 222 35 243 +136.56 ± 12.18 0 3 60 184 3 +327.18 ± 44.54
469580 ncm-dbt-04 567244 500 224 46 230 +129.35 ± 12.8 0 3 71 171 5 +295.94 ± 40.69
469579 ncm-dbt-01 582694 500 229 39 232 +138.99 ± 11.88 0 1 62 183 4 +333.32 ± 43.57
469578 ncm-dbt-03 585590 500 217 45 238 +124.6 ± 12.9 0 3 77 165 5 +280.42 ± 38.93
469577 ncm-dbt-02 585674 500 229 37 234 +140.62 ± 12.64 0 3 58 183 6 +333.32 ± 45.35
469576 ncm-dbt-05 577274 500 225 38 237 +136.56 ± 12.18 0 3 60 184 3 +327.18 ± 44.54
469575 ncm-dbt-04 567680 500 227 38 235 +138.18 ± 12.33 0 3 59 184 4 +330.23 ± 44.94
469574 ncm-dbt-03 585590 500 226 40 234 +135.76 ± 13.01 0 4 62 178 6 +315.35 ± 43.81
469573 ncm-dbt-01 584706 500 227 44 229 +133.34 ± 13.63 0 6 62 175 7 +304.07 ± 43.81
469572 ncm-dbt-02 583447 500 210 23 267 +136.56 ± 11.97 0 2 62 183 3 +327.18 ± 43.69
469571 ncm-dbt-05 584916 500 222 38 240 +134.14 ± 11.86 0 0 70 176 4 +315.34 ± 40.62
469570 ncm-dbt-04 567324 500 234 45 221 +138.18 ± 12.93 0 1 68 172 9 +315.35 ± 41.44
469569 ncm-dbt-03 584706 500 232 31 237 +148.02 ± 14.3 0 9 41 190 10 +349.43 ± 53.08
469568 ncm-dbt-01 583196 500 228 39 233 +138.18 ± 12.73 0 3 61 180 6 +324.17 ± 44.15
469567 ncm-dbt-02 584453 500 216 39 245 +128.55 ± 12.63 0 2 74 169 5 +293.29 ± 39.69
469566 ncm-dbt-05 585126 500 235 45 220 +138.99 ± 12.5 0 1 65 177 7 +324.17 ± 42.47
469565 ncm-dbt-03 586774 500 226 45 229 +131.74 ± 11.94 0 1 70 176 3 +309.64 ± 40.79
469564 ncm-dbt-04 566928 500 220 36 244 +134.15 ± 12.06 0 3 62 183 2 +321.19 ± 43.77
469563 ncm-dbt-01 579083 500 227 46 227 +131.74 ± 12.93 0 3 69 172 6 +301.33 ± 41.33
469562 ncm-dbt-02 584201 500 229 46 225 +133.34 ± 12.09 0 1 69 176 4 +312.48 ± 41.11
469561 ncm-dbt-03 584495 500 228 40 232 +137.37 ± 11.94 0 0 67 178 5 +324.16 ± 41.61
469560 ncm-dbt-05 585295 500 209 42 249 +120.67 ± 12.22 0 3 78 168 1 +277.93 ± 38.66
469559 ncm-dbt-01 581028 500 216 33 251 +133.34 ± 11.67 0 1 67 180 2 +318.25 ± 41.77
469558 ncm-dbt-04 569949 500 217 40 243 +128.55 ± 12.82 0 6 63 179 2 +301.33 ± 43.45
469557 ncm-dbt-02 589497 500 222 37 241 +134.95 ± 12.04 0 1 67 178 4 +318.25 ± 41.77

Commit

Commit ID 133731f33166afcde7fb7a76c41e47c3cddcee8b
Author tobi437a
Date 2026-05-19 16:42:17 UTC
Simplify away unused CorrHistType variants After the introduction of UnifiedCorrectionHistory, the Pawn, Minor and NonPawn entries in CorrHistType are dead - only PieceTo and Continuation are referenced via CorrectionHistory<T>. Drop them, along with the now unreachable default template and the NonPawn specialization. Reduce the primary CorrHistTypedef template to a forward declaration so that any future stray use of an unsupported tag fails to compile. closes https://github.com/official-stockfish/Stockfish/pull/6828 No functional change
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