Dev Builds » 20250224-1815

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 06:45:44 584173 4000 1584 484 1932 +98.07 ± 4.82 0 80 755 1150 15 +211.13 ± 12.37
ncm-dbt-02 06:45:14 586367 4000 1617 467 1916 +102.78 ± 4.71 0 65 733 1189 13 +224.2 ± 12.54
ncm-dbt-03 06:45:09 586694 4000 1602 476 1922 +100.52 ± 4.79 1 68 754 1158 19 +216.85 ± 12.36
ncm-dbt-04 06:46:28 570270 4004 1628 480 1896 +102.49 ± 4.72 1 59 751 1173 18 +222.38 ± 12.37
ncm-dbt-05 06:47:12 585860 3996 1582 486 1928 +97.8 ± 4.75 0 72 771 1142 13 +210.91 ± 12.22
20000 8013 2393 9594 +100.33 ± 2.13 2 344 3764 5812 78 +217.05 ± 5.53

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
401540 ncm-dbt-04 568593 4 2 0 2 +190.27 ± 27.79 0 0 0 2 0 +1199.83 ± 312.71
401539 ncm-dbt-02 587664 500 198 48 254 +107.54 ± 13.73 0 10 82 156 2 +236.51 ± 37.9
401538 ncm-dbt-05 587282 496 202 51 243 +109.23 ± 13.63 0 11 75 162 0 +245.68 ± 39.65
401537 ncm-dbt-01 582527 500 199 66 235 +94.69 ± 13.62 0 12 93 145 0 +206.01 ± 35.51
401536 ncm-dbt-03 585717 500 210 62 228 +106.01 ± 13.39 0 7 91 149 3 +230.16 ± 35.78
401535 ncm-dbt-04 569789 500 206 62 232 +102.97 ± 12.7 0 5 97 147 1 +226.0 ± 34.38
401534 ncm-dbt-02 583154 500 207 63 230 +102.97 ± 14.49 0 14 81 152 3 +221.9 ± 38.08
401533 ncm-dbt-05 581361 500 189 57 254 +93.95 ± 13.77 0 12 95 142 1 +202.15 ± 35.11
401532 ncm-dbt-01 585379 500 187 66 247 +85.78 ± 13.77 0 12 107 129 2 +179.9 ± 32.89
401531 ncm-dbt-03 586646 500 203 45 252 +113.68 ± 11.93 0 0 94 154 2 +254.16 ± 34.41
401530 ncm-dbt-04 570228 500 203 68 229 +96.19 ± 13.48 0 8 102 137 3 +204.07 ± 33.61
401529 ncm-dbt-02 586308 500 204 53 243 +108.3 ± 13.56 0 9 83 156 2 +238.66 ± 37.66
401528 ncm-dbt-01 583614 500 206 66 228 +99.95 ± 13.03 0 7 97 145 1 +217.85 ± 34.53
401527 ncm-dbt-05 584117 500 200 55 245 +103.73 ± 13.55 0 7 95 144 4 +221.9 ± 34.93
401526 ncm-dbt-03 583363 500 201 64 235 +97.69 ± 14.13 0 11 95 140 4 +206.01 ± 35.09
401525 ncm-dbt-04 569829 500 197 53 250 +102.97 ± 13.87 0 10 89 148 3 +221.9 ± 36.31
401524 ncm-dbt-02 583447 500 181 57 262 +88.0 ± 13.66 0 12 103 134 1 +187.16 ± 33.6
401523 ncm-dbt-01 584958 500 199 55 246 +102.97 ± 14.18 0 12 85 150 3 +221.9 ± 37.21
401522 ncm-dbt-05 589882 500 194 61 245 +94.69 ± 13.62 0 10 99 139 2 +202.15 ± 34.28
401521 ncm-dbt-03 585970 500 208 69 223 +99.2 ± 13.51 1 4 104 137 4 +211.87 ± 33.02
401520 ncm-dbt-04 569749 500 203 56 241 +105.25 ± 13.56 0 9 87 152 2 +230.16 ± 36.73
401519 ncm-dbt-02 588217 500 206 64 230 +101.46 ± 12.87 0 6 97 146 1 +221.9 ± 34.46
401518 ncm-dbt-01 582778 500 186 48 266 +98.44 ± 13.98 0 13 87 149 1 +213.85 ± 36.76
401517 ncm-dbt-05 583070 500 197 81 222 +82.1 ± 13.06 0 9 117 123 1 +172.78 ± 31.06
401516 ncm-dbt-04 570709 500 207 58 235 +106.77 ± 13.23 0 8 86 155 1 +236.51 ± 36.93
401515 ncm-dbt-03 586393 500 197 54 249 +102.22 ± 13.7 0 10 89 149 2 +221.9 ± 36.31
401514 ncm-dbt-02 586435 500 208 60 232 +106.01 ± 12.88 0 5 94 149 2 +232.26 ± 35.0
401513 ncm-dbt-05 586054 500 201 64 235 +97.69 ± 12.84 0 6 102 141 1 +211.87 ± 33.48
401512 ncm-dbt-01 586731 500 204 61 235 +102.22 ± 13.37 0 7 96 144 3 +219.87 ± 34.73
401511 ncm-dbt-04 570829 500 198 70 232 +90.97 ± 13.87 1 7 109 129 4 +190.85 ± 32.34
401510 ncm-dbt-03 587155 500 194 67 239 +90.22 ± 13.86 0 14 95 141 0 +194.57 ± 35.13
401509 ncm-dbt-02 587749 500 208 62 230 +104.49 ± 12.53 0 4 97 148 1 +230.16 ± 34.29
401508 ncm-dbt-03 588345 500 192 58 250 +95.44 ± 14.1 0 12 95 140 3 +202.15 ± 35.11
401507 ncm-dbt-05 584076 500 194 63 243 +93.2 ± 13.6 0 10 101 137 2 +198.34 ± 33.9
401506 ncm-dbt-04 572719 500 209 54 237 +111.37 ± 12.69 0 4 89 155 2 +247.41 ± 36.02
401505 ncm-dbt-01 582945 500 192 59 249 +94.69 ± 13.3 0 9 100 140 1 +204.07 ± 34.04
401504 ncm-dbt-02 587962 500 205 60 235 +103.73 ± 12.7 0 5 96 148 1 +228.08 ± 34.59
401503 ncm-dbt-03 589967 500 197 57 246 +99.95 ± 13.52 0 10 91 148 1 +217.85 ± 35.89
401502 ncm-dbt-05 591039 500 205 54 241 +108.3 ± 13.23 0 7 87 154 2 +238.66 ± 36.67
401501 ncm-dbt-04 569989 500 203 59 238 +102.97 ± 13.38 0 8 92 148 2 +223.94 ± 35.61
401500 ncm-dbt-01 584453 500 211 63 226 +106.01 ± 13.72 0 8 90 148 4 +228.08 ± 36.04

Commit

Commit ID 0f9ae0d11cd034288a49ef3892c580dfed025091
Author Joost VandeVondele
Date 2025-02-24 18:15:32 UTC
Check maximum time every iteration This fixes a TCEC timeloss, where slow DTZ TB7 access, in combination with syzygy PV extension, led to a timeloss. While the extension code correctly aborted after spending moveOverhead/2 time, the mainThread did not search sufficient nodes (512 in > 1s) to trigger the stop in check_time. At the same time, totalTime exceeded tm.maximum() due to the factors multiplying tm.optimum(). This corner case is fixed by checking also against the tm.maximum() at each iteration. Even though this problem can't be triggered on fishtest, the patch was verified there. Passed STC: https://tests.stockfishchess.org/tests/view/67b99e1be99f8640b318810d LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 136832 W: 35625 L: 35518 D: 65689 Ptnml(0-2): 499, 14963, 37431, 14978, 545 closes https://github.com/official-stockfish/Stockfish/pull/5896 No functional change
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