Dev Builds » 20261017-1124

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 06:40:38 584184 4000 1848 272 1880 +144.72 ± 4.29 0 20 424 1516 40 +352.8 ± 16.56
ncm-dbt-02 06:41:12 591376 4000 1854 265 1881 +146.05 ± 4.23 0 12 431 1513 44 +356.64 ± 16.4
ncm-dbt-03 06:42:28 583376 4008 1875 241 1892 +150.38 ± 4.22 0 12 398 1542 52 +371.72 ± 17.08
ncm-dbt-04 06:41:23 566300 4000 1828 267 1905 +143.18 ± 4.28 0 15 450 1494 41 +346.12 ± 16.05
ncm-dbt-05 06:42:28 601611 3992 1834 274 1884 +143.39 ± 4.32 0 14 454 1482 46 +344.9 ± 15.97
20000 9239 1319 9442 +145.54 ± 1.91 0 73 2157 7547 223 +354.24 ± 7.32

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
486683 ncm-dbt-03 584076 8 3 1 4 +88.62 ± 93.84 0 0 2 2 0 +190.67 ± 458.56 ↓
486682 ncm-dbt-05 599185 492 232 35 225 +147.36 ± 12.7 0 2 53 183 8 +353.05 ± 47.51 ↓
486681 ncm-dbt-01 584201 500 230 42 228 +137.37 ± 12.15 0 2 62 182 4 +327.18 ± 43.69 ↓
486680 ncm-dbt-02 590782 500 231 35 234 +143.89 ± 11.87 0 1 57 187 5 +349.43 ± 45.6 ↓
486679 ncm-dbt-04 565076 500 229 30 241 +146.36 ± 12.61 0 3 52 188 7 +352.8 ± 48.05 ↓
486678 ncm-dbt-03 585801 500 245 23 232 +165.79 ± 12.11 0 0 41 196 13 +419.6 ± 54.3 ↓
486677 ncm-dbt-05 601580 500 226 41 233 +134.95 ± 12.64 0 3 64 178 5 +315.35 ± 43.03 ↓
486676 ncm-dbt-04 568633 500 220 41 239 +130.14 ± 12.39 0 4 65 179 2 +306.84 ± 42.73 ↓
486675 ncm-dbt-02 590267 500 230 33 237 +144.71 ± 11.38 0 1 54 192 3 +359.68 ± 46.95 ↓
486674 ncm-dbt-01 585970 500 233 41 226 +140.62 ± 12.02 0 2 58 186 4 +339.63 ± 45.29 ↓
486673 ncm-dbt-03 585421 500 233 24 243 +154.7 ± 10.48 0 0 44 203 3 +406.2 ± 52.26 ↓
486672 ncm-dbt-05 604487 500 225 37 238 +137.37 ± 11.73 0 1 63 183 3 +330.23 ± 43.2 ↓
486671 ncm-dbt-02 589582 500 231 31 238 +147.19 ± 12.98 0 2 56 182 10 +346.12 ± 46.15 ↓
486670 ncm-dbt-04 566533 500 232 36 232 +143.89 ± 12.92 0 2 59 180 9 +336.46 ± 44.87 ↓
486669 ncm-dbt-01 583782 500 229 32 239 +144.71 ± 13.08 0 5 50 188 7 +346.12 ± 48.95 ↓
486668 ncm-dbt-03 581236 500 228 27 245 +148.02 ± 12.94 0 2 55 183 10 +349.43 ± 46.59 ↓
486667 ncm-dbt-05 603410 500 227 30 243 +144.71 ± 12.05 0 2 54 189 5 +352.8 ± 47.05 ↓
486666 ncm-dbt-02 590825 500 224 25 251 +146.36 ± 11.29 0 1 52 194 3 +366.78 ± 47.92 ↓
486665 ncm-dbt-04 567759 500 231 29 240 +148.84 ± 11.37 0 0 53 192 5 +370.41 ± 47.26 ↓
486664 ncm-dbt-01 585379 500 230 28 242 +148.85 ± 11.37 0 1 50 195 4 +374.11 ± 48.94 ↓
486663 ncm-dbt-03 583112 500 239 36 225 +149.68 ± 12.23 0 1 53 188 8 +363.2 ± 47.43 ↓
486662 ncm-dbt-05 600913 500 233 34 233 +146.36 ± 11.52 0 1 53 192 4 +363.2 ± 47.43 ↓
486661 ncm-dbt-02 591211 500 238 39 223 +146.36 ± 11.96 0 1 55 188 6 +356.21 ± 46.49 ↓
486660 ncm-dbt-03 582611 500 232 31 237 +148.02 ± 11.42 0 2 48 197 3 +374.11 ± 50.1 ↓
486659 ncm-dbt-04 564683 500 229 35 236 +142.25 ± 12.37 0 2 58 184 6 +339.63 ± 45.29 ↓
486658 ncm-dbt-01 584117 500 232 36 232 +143.89 ± 12.71 0 3 55 185 7 +342.85 ± 46.64 ↓
486657 ncm-dbt-05 596197 500 229 31 240 +145.54 ± 11.79 0 3 49 195 3 +363.2 ± 49.57 ↓
486656 ncm-dbt-02 591555 500 238 34 228 +150.51 ± 11.27 0 1 48 197 4 +381.7 ± 50.02 ↓
486655 ncm-dbt-03 581652 500 234 26 240 +153.86 ± 11.05 0 1 44 201 4 +397.72 ± 52.42 ↓
486654 ncm-dbt-04 567640 500 224 32 244 +140.62 ± 11.81 0 1 60 185 4 +339.63 ± 44.35 ↓
486653 ncm-dbt-01 584664 500 226 29 245 +144.71 ± 12.26 0 2 55 187 6 +349.43 ± 46.59 ↓
486652 ncm-dbt-05 600558 500 231 31 238 +147.19 ± 12.98 0 2 56 182 10 +346.12 ± 46.15 ↓
486651 ncm-dbt-02 592029 500 228 31 241 +144.71 ± 12.05 0 3 51 192 4 +356.21 ± 48.54 ↓
486650 ncm-dbt-03 582861 500 232 33 235 +146.36 ± 11.96 0 1 55 188 6 +356.21 ± 46.49 ↓
486649 ncm-dbt-01 584706 500 239 26 235 +158.08 ± 10.47 0 2 35 211 2 +429.05 ± 59.28 ↓
486648 ncm-dbt-04 566454 500 234 30 236 +150.51 ± 11.27 0 2 45 200 3 +385.59 ± 51.85 ↓
486647 ncm-dbt-05 606562 500 231 35 234 +143.89 ± 12.3 0 0 62 180 8 +339.63 ± 43.41 ↓
486646 ncm-dbt-01 580655 500 229 38 233 +139.81 ± 12.67 0 3 59 182 6 +330.23 ± 44.94 ↓
486645 ncm-dbt-03 583614 500 229 40 231 +138.18 ± 12.93 0 5 56 184 5 +327.18 ± 46.19 ↓
486644 ncm-dbt-02 594758 500 234 37 229 +144.71 ± 12.88 0 2 58 181 9 +339.63 ± 45.29 ↓
486643 ncm-dbt-04 563626 500 229 34 237 +143.07 ± 11.91 0 1 58 186 5 +346.12 ± 45.18 ↓

Commit

Commit ID 6a9ec5c33d00c13edde7d19249194102867ae8c3
Author Linmiao Xu
Date 2026-10-17 11:24:23 UTC
Lazy compute threats STC: https://tests.stockfishchess.org/tests/view/6acf2360733e627f7058c039 LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 73376 W: 18866 L: 18527 D: 35983 Ptnml(0-2): 88, 7499, 21176, 7836, 89 Compute threats lazily as needed. Unfortunately, this patch overlaps with https://github.com/official-stockfish/Stockfish/pull/7227 for which I apologize. I'm more than happy to give all credit to @linrock and make him the author. I think the movegen stuff in the other patch could be tested separately. No functional change. Written by Claude. closes https://github.com/official-stockfish/Stockfish/pull/7228 No functional change
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