Dev Builds » 20250702-1641

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 06:42:55 578833 4000 1635 470 1895 +104.21 ± 4.72 1 57 736 1188 18 +227.04 ± 12.5
ncm-dbt-02 06:43:54 586124 4000 1643 486 1871 +103.45 ± 4.71 2 60 728 1199 11 +227.04 ± 12.58
ncm-dbt-03 06:47:49 584795 4032 1675 439 1918 +110.04 ± 4.69 0 59 680 1259 18 +243.09 ± 13.04
ncm-dbt-04 06:44:23 568232 3994 1642 432 1920 +108.67 ± 4.79 1 61 685 1227 23 +238.06 ± 13.0
ncm-dbt-05 06:43:38 578198 3974 1620 482 1872 +102.35 ± 4.85 0 72 727 1166 22 +220.71 ± 12.61
20000 8215 2309 9476 +105.75 ± 2.12 4 309 3556 6039 92 +231.11 ± 5.69

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
420618 ncm-dbt-03 584832 32 15 4 13 +124.48 ± 56.99 0 1 3 12 0 +292.96 ± 299.25
420617 ncm-dbt-05 578794 474 194 56 224 +104.16 ± 14.19 0 9 84 141 3 +224.78 ± 37.39
420616 ncm-dbt-04 568991 494 211 56 227 +112.82 ± 12.78 0 5 83 158 1 +253.86 ± 37.5
420615 ncm-dbt-02 585253 500 199 52 249 +105.25 ± 13.39 1 7 86 156 0 +236.51 ± 36.93
420614 ncm-dbt-01 579042 500 204 49 247 +111.37 ± 13.89 1 7 81 158 3 +247.41 ± 38.13
420613 ncm-dbt-03 586223 500 194 54 252 +99.95 ± 14.0 0 14 82 154 0 +219.87 ± 37.85
420612 ncm-dbt-05 576006 500 200 57 243 +102.22 ± 13.54 0 9 91 148 2 +221.9 ± 35.86
420611 ncm-dbt-04 568912 500 211 56 233 +111.37 ± 13.39 0 8 81 159 2 +247.41 ± 38.13
420610 ncm-dbt-01 577684 500 207 67 226 +99.95 ± 14.0 0 11 91 145 3 +213.85 ± 35.9
420609 ncm-dbt-02 587749 500 217 74 209 +102.22 ± 14.78 1 12 84 149 4 +219.87 ± 37.42
420608 ncm-dbt-03 581569 500 211 56 233 +111.37 ± 13.39 0 7 84 156 3 +245.2 ± 37.37
420607 ncm-dbt-05 582819 500 215 52 233 +117.55 ± 13.53 0 6 80 159 5 +258.75 ± 38.32
420606 ncm-dbt-04 569829 500 200 58 242 +101.46 ± 14.32 1 11 85 151 2 +221.9 ± 37.21
420605 ncm-dbt-01 579661 500 206 55 239 +108.3 ± 12.35 0 3 94 152 1 +240.82 ± 34.82
420604 ncm-dbt-02 585928 500 207 62 231 +103.73 ± 12.88 0 7 91 152 0 +230.16 ± 35.78
420603 ncm-dbt-03 585379 500 203 59 238 +102.97 ± 13.21 0 9 88 153 0 +228.08 ± 36.51
420602 ncm-dbt-05 573932 500 205 57 238 +106.01 ± 13.22 0 6 93 148 3 +230.16 ± 35.29
420601 ncm-dbt-04 570108 500 204 57 239 +105.25 ± 14.51 0 12 84 149 5 +223.94 ± 37.43
420600 ncm-dbt-01 578630 500 197 56 247 +100.7 ± 14.47 0 14 84 149 3 +215.85 ± 37.4
420599 ncm-dbt-02 584958 500 206 71 223 +96.19 ± 12.82 0 7 101 142 0 +209.91 ± 33.74
420598 ncm-dbt-03 585211 500 205 51 244 +110.6 ± 13.39 0 8 82 158 2 +245.2 ± 37.88
420597 ncm-dbt-05 578342 500 212 71 217 +100.7 ± 13.53 0 8 96 143 3 +215.85 ± 34.78
420596 ncm-dbt-04 565902 500 209 61 230 +106.01 ± 13.39 0 9 85 155 1 +234.38 ± 37.19
420595 ncm-dbt-01 576169 500 206 65 229 +100.7 ± 13.2 0 8 94 147 1 +219.87 ± 35.19
420594 ncm-dbt-02 585674 500 211 52 237 +114.45 ± 13.38 0 6 83 157 4 +251.89 ± 37.57
420593 ncm-dbt-03 582527 500 201 53 246 +106.01 ± 12.53 0 4 95 150 1 +234.38 ± 34.71
420592 ncm-dbt-04 568196 500 202 52 246 +107.54 ± 13.4 0 7 89 151 3 +234.38 ± 36.22
420591 ncm-dbt-05 578753 500 195 72 233 +87.26 ± 14.54 0 16 98 133 3 +181.7 ± 34.58
420590 ncm-dbt-01 580365 500 207 61 232 +104.49 ± 12.71 0 3 101 143 3 +226.0 ± 33.39
420589 ncm-dbt-02 586012 500 198 57 245 +100.7 ± 13.03 0 6 99 143 2 +217.85 ± 34.06
420588 ncm-dbt-03 585759 500 211 56 233 +111.37 ± 13.05 0 5 88 154 3 +245.2 ± 36.32
420587 ncm-dbt-04 569509 500 211 51 238 +115.22 ± 12.48 0 3 86 159 2 +258.75 ± 36.62
420586 ncm-dbt-05 576741 500 195 52 253 +102.22 ± 12.87 0 5 99 144 2 +221.9 ± 33.98
420585 ncm-dbt-01 579537 500 204 53 243 +108.3 ± 13.06 0 7 86 156 1 +240.82 ± 36.9
420584 ncm-dbt-02 587240 500 202 66 232 +96.94 ± 13.49 0 10 95 144 1 +209.91 ± 35.06
420583 ncm-dbt-03 583950 500 223 44 233 +130.14 ± 13.16 0 3 72 168 7 +293.29 ± 40.39
420582 ncm-dbt-05 580199 500 204 65 231 +99.2 ± 13.99 0 13 86 150 1 +215.85 ± 36.98
420581 ncm-dbt-04 564409 500 194 41 265 +109.83 ± 13.89 0 6 92 145 7 +232.26 ± 35.5
420580 ncm-dbt-01 579578 500 204 64 232 +99.95 ± 12.86 0 4 105 138 3 +213.85 ± 32.74
420579 ncm-dbt-02 586181 500 203 52 245 +108.3 ± 12.53 0 5 89 156 0 +243.0 ± 36.1
420578 ncm-dbt-03 587707 500 212 62 226 +107.54 ± 13.4 0 8 86 154 2 +236.51 ± 36.93

Commit

Commit ID ce73441f2013e0b8fd3eb7a0c9fd391d52adde70
Author FauziAkram
Date 2025-07-02 16:41:46 UTC
Simplify sudden death time optimization Passed Sudden Death STC: https://tests.stockfishchess.org/tests/view/68455fe5375c2b77d9855351 LLR: 2.91 (-2.94,2.94) <-1.75,0.25> Total: 49248 W: 13008 L: 12798 D: 23442 Ptnml(0-2): 309, 5491, 12821, 5687, 316 Passed Sudden Death LTC: https://tests.stockfishchess.org/tests/view/6845a392375c2b77d98553cf LLR: 3.01 (-2.94,2.94) <-1.75,0.25> Total: 551070 W: 141699 L: 142031 D: 267340 Ptnml(0-2): 1923, 60608, 150916, 60054, 2034 Passed Standard STC: https://tests.stockfishchess.org/tests/view/683c5ebb6ec7634154f9d989 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 142624 W: 36808 L: 36709 D: 69107 Ptnml(0-2): 302, 15448, 39745, 15483, 334 Passed Standard LTC: https://tests.stockfishchess.org/tests/view/683f1a4f6ec7634154f9dc5a LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 146922 W: 37381 L: 37296 D: 72245 Ptnml(0-2): 69, 13552, 46117, 13671, 52 closes https://github.com/official-stockfish/Stockfish/pull/6132 Bench: 2249459
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