Dev Builds » 20250602-1955

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 06:43:07 580099 4000 1670 455 1875 +108.97 ± 4.77 0 68 666 1249 17 +240.28 ± 13.2
ncm-dbt-02 06:44:56 585826 4000 1636 422 1942 +108.88 ± 4.76 0 64 678 1238 20 +239.2 ± 13.07
ncm-dbt-03 06:44:26 583868 4000 1641 430 1929 +108.59 ± 4.71 0 52 710 1213 25 +237.05 ± 12.73
ncm-dbt-04 06:44:50 568197 4000 1630 440 1930 +106.58 ± 4.73 1 68 680 1242 9 +235.98 ± 13.06
ncm-dbt-05 06:46:20 582392 4000 1641 457 1902 +106.01 ± 4.81 1 67 700 1211 21 +231.21 ± 12.86
20000 8218 2204 9578 +107.81 ± 2.13 2 319 3434 6153 92 +236.73 ± 5.8

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
416416 ncm-dbt-05 581777 500 209 53 238 +112.14 ± 14.38 0 12 74 160 4 +245.2 ± 39.87
416415 ncm-dbt-02 585169 500 198 45 257 +109.83 ± 12.7 0 6 85 159 0 +247.41 ± 37.09
416414 ncm-dbt-01 580779 500 208 58 234 +107.54 ± 13.4 0 10 80 160 0 +240.82 ± 38.39
416413 ncm-dbt-04 568196 500 205 64 231 +100.7 ± 14.01 0 14 81 155 0 +221.9 ± 38.08
416412 ncm-dbt-03 585337 500 200 53 247 +105.25 ± 13.56 0 10 84 155 1 +232.26 ± 37.43
416411 ncm-dbt-05 584201 500 194 59 247 +96.19 ± 13.95 1 11 90 148 0 +211.87 ± 36.13
416410 ncm-dbt-02 585548 500 207 64 229 +102.22 ± 13.54 0 9 91 148 2 +221.9 ± 35.86
416409 ncm-dbt-04 567720 500 206 51 243 +111.37 ± 14.38 1 11 72 164 2 +249.64 ± 40.41
416408 ncm-dbt-03 587155 500 207 59 234 +106.01 ± 13.56 0 8 89 150 3 +230.16 ± 36.26
416407 ncm-dbt-01 579083 500 212 61 227 +108.3 ± 14.21 0 13 75 160 2 +238.66 ± 39.57
416406 ncm-dbt-05 582611 500 201 57 242 +102.97 ± 13.21 0 9 88 153 0 +228.08 ± 36.51
416405 ncm-dbt-02 584790 500 213 42 245 +123.81 ± 13.98 0 8 69 167 6 +275.45 ± 41.43
416404 ncm-dbt-04 563431 500 207 49 244 +113.68 ± 12.5 0 4 85 160 1 +256.44 ± 36.95
416403 ncm-dbt-01 576537 500 206 50 244 +112.14 ± 12.51 0 3 90 155 2 +249.64 ± 35.69
416402 ncm-dbt-03 580157 500 206 42 252 +118.33 ± 13.0 0 5 79 163 3 +265.78 ± 38.54
416401 ncm-dbt-05 578630 500 204 53 243 +108.3 ± 13.89 0 7 91 146 6 +230.16 ± 35.78
416400 ncm-dbt-02 584706 500 218 54 228 +118.33 ± 12.63 0 4 80 164 2 +268.17 ± 38.21
416399 ncm-dbt-01 581569 500 207 59 234 +106.01 ± 13.05 0 8 86 156 0 +236.51 ± 36.93
416398 ncm-dbt-04 568792 500 218 54 228 +118.33 ± 13.0 0 7 73 169 1 +270.57 ± 40.25
416397 ncm-dbt-03 585000 500 198 50 252 +106.01 ± 13.39 0 7 91 149 3 +230.16 ± 35.78
416396 ncm-dbt-05 581527 500 212 64 224 +106.01 ± 13.39 0 6 94 146 4 +228.08 ± 35.08
416395 ncm-dbt-02 588728 500 207 63 230 +102.97 ± 14.02 0 10 90 146 4 +219.87 ± 36.1
416394 ncm-dbt-01 581610 500 205 55 240 +107.54 ± 12.71 0 6 88 156 0 +240.82 ± 36.39
416393 ncm-dbt-04 568037 500 200 57 243 +102.22 ± 13.37 0 9 90 150 1 +223.94 ± 36.07
416392 ncm-dbt-03 583531 500 200 54 246 +104.49 ± 13.71 0 8 92 146 4 +223.94 ± 35.61
416391 ncm-dbt-05 582694 500 205 51 244 +110.6 ± 13.56 0 7 86 153 4 +240.82 ± 36.9
416390 ncm-dbt-02 583992 500 203 45 252 +113.68 ± 13.04 0 5 85 157 3 +251.89 ± 37.03
416389 ncm-dbt-01 580530 500 215 49 236 +119.89 ± 14.19 0 7 78 157 8 +258.75 ± 38.88
416388 ncm-dbt-04 570228 500 200 59 241 +100.7 ± 12.69 0 6 97 147 0 +221.9 ± 34.46
416387 ncm-dbt-03 581693 500 209 51 240 +113.68 ± 13.04 0 6 82 160 2 +254.16 ± 37.82
416386 ncm-dbt-02 585759 500 197 49 254 +106.01 ± 13.56 0 10 83 156 1 +234.38 ± 37.67
416385 ncm-dbt-01 579537 500 210 62 228 +106.01 ± 14.51 0 13 80 153 4 +228.08 ± 38.34
416384 ncm-dbt-05 582318 500 209 66 225 +102.22 ± 13.04 0 7 94 148 1 +223.94 ± 35.14
416383 ncm-dbt-04 569111 500 200 44 256 +112.14 ± 13.22 0 7 82 159 2 +249.64 ± 37.86
416382 ncm-dbt-03 585843 500 213 64 223 +106.77 ± 13.06 0 3 100 142 5 +228.08 ± 33.59
416381 ncm-dbt-01 581153 500 207 61 232 +104.49 ± 13.22 0 8 89 152 1 +230.16 ± 36.26
416380 ncm-dbt-02 587919 500 193 60 247 +94.69 ± 13.93 0 12 95 141 2 +202.15 ± 35.11
416379 ncm-dbt-05 585379 500 207 54 239 +109.83 ± 13.4 0 8 83 157 2 +243.0 ± 37.64
416378 ncm-dbt-04 570068 500 194 62 244 +93.95 ± 13.61 0 10 100 138 2 +200.24 ± 34.09
416377 ncm-dbt-03 582235 500 208 57 235 +108.3 ± 13.23 0 5 93 148 4 +234.38 ± 35.22

Commit

Commit ID c9af7674bc120b4f75153e00c40315ff0f54b86c
Author Shawn Xu
Date 2025-06-02 19:55:55 UTC
Introduce Secondary TT Aging When a high-depth TT entry fail to produce a cutoff, decrease the stored depth by 1. This is intended to help cases such as #5023 (https://github.com/official-stockfish/Stockfish/issues/5023#issuecomment-2814209391), where entries with extremely high depths prevent TT cutoffs, contributing to search explosions. Passed STC: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 128800 W: 33502 L: 33053 D: 62245 Ptnml(0-2): 331, 15084, 33149, 15477, 359 https://tests.stockfishchess.org/tests/view/683958e56ec7634154f9d2a9 Passed LTC: LLR: 2.97 (-2.94,2.94) <0.50,2.50> Total: 63288 W: 16376 L: 16005 D: 30907 Ptnml(0-2): 26, 6712, 17798, 7081, 27 https://tests.stockfishchess.org/tests/view/683aa4026ec7634154f9d469 closes https://github.com/official-stockfish/Stockfish/pull/6113 Bench: 2144705
Copyright 2011–2025 Next Chess Move LLC