Dev Builds » 20250224-1814

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 06:44:25 583534 4000 1650 488 1862 +103.92 ± 4.89 0 79 703 1195 23 +224.72 ± 12.84
ncm-dbt-02 06:46:50 586602 4012 1652 449 1911 +107.48 ± 4.69 1 58 699 1233 15 +236.9 ± 12.85
ncm-dbt-03 06:46:50 586026 4000 1599 470 1931 +100.8 ± 4.76 1 63 761 1156 19 +217.6 ± 12.29
ncm-dbt-04 06:45:30 570695 4000 1629 475 1896 +103.16 ± 4.79 0 65 740 1171 24 +222.41 ± 12.48
ncm-dbt-05 06:46:44 585082 3988 1611 518 1859 +97.72 ± 4.86 2 79 752 1146 15 +210.7 ± 12.4
20000 8141 2400 9459 +102.61 ± 2.15 4 344 3655 5901 96 +222.36 ± 5.62

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
401583 ncm-dbt-02 588345 12 6 2 4 +120.31 ± 75.55 0 0 2 4 0 +279.41 ± 548.26
401582 ncm-dbt-05 583740 488 198 58 232 +102.55 ± 13.58 0 8 90 144 2 +222.7 ± 36.01
401581 ncm-dbt-03 585843 500 196 51 253 +103.73 ± 13.22 1 5 93 150 1 +230.16 ± 35.29
401580 ncm-dbt-04 572155 500 200 58 242 +101.46 ± 13.2 0 6 99 142 3 +217.85 ± 34.06
401579 ncm-dbt-01 579207 500 213 55 232 +113.68 ± 13.55 0 9 76 163 2 +254.16 ± 39.42
401578 ncm-dbt-02 588515 500 205 64 231 +100.7 ± 13.69 0 11 88 150 1 +219.87 ± 36.54
401577 ncm-dbt-05 588643 500 196 66 238 +92.45 ± 13.59 0 11 99 139 1 +198.34 ± 34.31
401576 ncm-dbt-03 586901 500 202 57 241 +103.73 ± 13.71 0 10 87 151 2 +226.0 ± 36.75
401575 ncm-dbt-04 571471 500 210 50 240 +115.22 ± 13.2 0 7 78 163 2 +258.75 ± 38.88
401574 ncm-dbt-01 583572 500 212 70 218 +101.46 ± 13.04 0 7 95 147 1 +221.9 ± 34.93
401573 ncm-dbt-02 586012 500 205 56 239 +106.77 ± 13.06 0 7 88 154 1 +236.51 ± 36.44
401572 ncm-dbt-05 585464 500 206 71 223 +96.19 ± 13.64 0 9 100 138 3 +204.07 ± 34.04
401571 ncm-dbt-03 586689 500 190 70 240 +85.04 ± 13.9 0 12 109 126 3 +176.33 ± 32.55
401570 ncm-dbt-04 570709 500 197 57 246 +99.95 ± 13.36 0 8 96 144 2 +215.85 ± 34.78
401569 ncm-dbt-01 580779 500 204 62 234 +101.46 ± 14.32 0 12 88 146 4 +215.85 ± 36.55
401568 ncm-dbt-02 584453 500 200 56 244 +102.97 ± 13.21 0 8 91 150 1 +226.0 ± 35.82
401567 ncm-dbt-05 579455 500 214 57 229 +112.91 ± 13.39 0 5 88 152 5 +245.2 ± 36.32
401566 ncm-dbt-03 585211 500 207 54 239 +109.83 ± 13.89 0 10 80 157 3 +240.82 ± 38.39
401565 ncm-dbt-01 584622 500 203 63 234 +99.95 ± 14.31 0 12 90 144 4 +211.87 ± 36.13
401564 ncm-dbt-04 570909 500 201 53 246 +106.01 ± 13.56 0 7 92 147 4 +228.08 ± 35.56
401563 ncm-dbt-02 587834 500 214 57 229 +112.91 ± 14.38 1 8 79 157 5 +247.41 ± 38.64
401562 ncm-dbt-05 588047 500 216 67 217 +106.77 ± 13.89 0 10 84 153 3 +232.26 ± 37.43
401561 ncm-dbt-04 569869 500 198 56 246 +101.46 ± 13.2 0 8 93 148 1 +221.9 ± 35.4
401560 ncm-dbt-01 584706 500 217 55 228 +116.77 ± 13.71 0 5 85 153 7 +251.89 ± 37.03
401559 ncm-dbt-03 586435 500 187 54 259 +94.69 ± 13.14 0 6 108 133 3 +200.24 ± 32.37
401558 ncm-dbt-02 585801 500 210 54 236 +112.14 ± 12.87 0 5 86 157 2 +249.64 ± 36.79
401557 ncm-dbt-05 584958 500 197 59 244 +98.45 ± 13.98 1 11 87 151 0 +217.85 ± 36.77
401556 ncm-dbt-04 570989 500 209 67 224 +101.46 ± 13.85 0 9 94 143 4 +215.85 ± 35.23
401555 ncm-dbt-01 583572 500 202 66 232 +96.94 ± 14.12 0 13 90 145 2 +207.95 ± 36.13
401554 ncm-dbt-03 586985 500 213 62 225 +108.3 ± 12.71 0 3 96 148 3 +236.51 ± 34.4
401553 ncm-dbt-02 585295 500 214 56 230 +113.68 ± 12.86 0 6 81 162 1 +256.44 ± 38.07
401552 ncm-dbt-05 587197 500 190 70 240 +85.04 ± 14.05 1 12 104 132 1 +181.7 ± 33.45
401551 ncm-dbt-01 585464 500 200 63 237 +97.69 ± 14.43 0 16 82 151 1 +211.87 ± 37.79
401550 ncm-dbt-04 569071 500 198 63 239 +96.19 ± 14.26 0 14 89 145 2 +206.01 ± 36.33
401549 ncm-dbt-03 587622 500 202 63 235 +99.2 ± 13.02 0 7 98 144 1 +215.85 ± 34.33
401548 ncm-dbt-02 587325 500 200 60 240 +99.95 ± 13.19 0 7 98 143 2 +215.85 ± 34.33
401547 ncm-dbt-01 586350 500 199 54 247 +103.73 ± 12.88 0 5 97 146 2 +226.0 ± 34.38
401546 ncm-dbt-05 583154 500 194 70 236 +88.0 ± 13.66 0 13 100 137 0 +189.0 ± 34.18
401545 ncm-dbt-03 582527 500 202 59 239 +102.22 ± 13.86 0 10 90 147 3 +219.87 ± 36.1
401544 ncm-dbt-04 570388 500 216 71 213 +103.73 ± 13.71 0 6 99 139 6 +217.85 ± 34.06
401543 ncm-dbt-02 585843 500 198 44 258 +110.6 ± 13.05 0 6 86 156 2 +245.2 ± 36.85

Commit

Commit ID c19a6ea53cd715af97717ba687c3ad4c9c2a98c8
Author Michael Chaly
Date 2025-02-24 18:14:04 UTC
Make Pv search shallower in some cases Conditions are the same as they are for doShallowerSearch, just that they also apply for cases where LMR wasn't reducing anything - if result is bad enough reduce search depth of PV search by 1. Passed STC: https://tests.stockfishchess.org/tests/view/67b9d2aca49c651c2caac818 LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 29216 W: 7731 L: 7424 D: 14061 Ptnml(0-2): 87, 3345, 7473, 3580, 123 Passed LTC: https://tests.stockfishchess.org/tests/view/67ba538c01f3463ae1d35e69 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 33168 W: 8529 L: 8219 D: 16420 Ptnml(0-2): 12, 3505, 9262, 3771, 34 closes https://github.com/official-stockfish/Stockfish/pull/5895 Bench: 2290732
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