Dev Builds » 20260510-0950

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 06:52:59 583038 4104 1827 339 1938 +131.97 ± 4.42 0 26 549 1440 37 +306.23 ± 14.52
ncm-dbt-02 06:55:27 585808 4080 1860 349 1871 +135.09 ± 4.44 1 26 513 1461 39 +316.84 ± 15.04
ncm-dbt-03 06:06:50 585341 3632 1636 298 1698 +134.3 ± 4.72 0 27 458 1297 34 +313.95 ± 15.92
ncm-dbt-04 06:55:25 567694 4112 1823 324 1965 +132.76 ± 4.44 1 30 528 1463 34 +310.37 ± 14.83
ncm-dbt-05 06:54:07 583744 4072 1807 338 1927 +131.25 ± 4.38 1 16 568 1415 36 +304.29 ± 14.22
20000 8953 1648 9399 +133.04 ± 2.0 3 125 2616 7076 180 +310.21 ± 6.65

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
468125 ncm-dbt-05 580945 72 34 7 31 +136.94 ± 32.71 0 0 10 25 1 +316.92 ± 116.53
468124 ncm-dbt-02 588515 80 34 6 40 +126.96 ± 31.41 0 1 10 29 0 +301.33 ± 117.92
468123 ncm-dbt-01 582694 104 49 10 45 +136.95 ± 26.2 0 0 14 37 1 +323.22 ± 95.84
468122 ncm-dbt-04 567601 112 50 12 50 +122.74 ± 27.75 0 2 14 40 0 +287.14 ± 96.32
468121 ncm-dbt-03 586012 132 59 10 63 +135.43 ± 24.46 0 0 19 45 2 +309.71 ± 80.48
468120 ncm-dbt-05 584622 500 219 36 245 +133.34 ± 12.09 0 0 72 173 5 +309.64 ± 40.0
468119 ncm-dbt-02 584958 500 229 38 233 +139.81 ± 12.87 0 2 63 177 8 +324.17 ± 43.32
468118 ncm-dbt-01 583028 500 216 40 244 +127.76 ± 12.65 0 3 72 171 4 +293.29 ± 40.39
468117 ncm-dbt-04 568355 500 228 38 234 +138.99 ± 13.1 0 5 56 183 6 +327.18 ± 46.19
468116 ncm-dbt-03 587113 500 225 37 238 +137.37 ± 12.15 0 2 62 182 4 +327.18 ± 43.69
468115 ncm-dbt-05 581818 500 218 40 242 +129.35 ± 13.17 0 4 70 170 6 +293.29 ± 41.07
468114 ncm-dbt-02 586308 500 232 38 230 +142.25 ± 12.16 0 2 57 186 5 +342.85 ± 45.71
468113 ncm-dbt-04 566336 500 217 34 249 +133.34 ± 12.89 0 6 58 183 3 +315.35 ± 45.33
468112 ncm-dbt-01 582152 500 220 46 234 +126.17 ± 12.49 0 3 73 171 3 +290.66 ± 40.08
468111 ncm-dbt-03 585169 500 225 41 234 +134.15 ± 12.67 0 3 65 177 5 +312.48 ± 42.67
468110 ncm-dbt-05 583321 500 225 48 227 +128.55 ± 12.63 0 3 71 172 4 +295.94 ± 40.69
468109 ncm-dbt-02 585337 500 234 51 215 +133.34 ± 12.49 0 1 71 172 6 +306.84 ± 40.47
468108 ncm-dbt-04 568395 500 229 37 234 +140.62 ± 13.04 0 5 54 185 6 +333.32 ± 47.06
468107 ncm-dbt-01 581361 500 228 39 233 +138.18 ± 13.32 0 5 58 180 7 +321.19 ± 45.36
468106 ncm-dbt-03 583363 500 223 45 232 +129.35 ± 13.54 0 7 63 175 5 +295.94 ± 43.42
468105 ncm-dbt-05 578300 500 220 43 237 +128.55 ± 12.43 0 1 76 168 5 +293.29 ± 38.98
468104 ncm-dbt-02 585253 500 225 38 237 +136.56 ± 13.17 0 6 56 183 5 +321.19 ± 46.14
468103 ncm-dbt-04 567918 500 217 50 233 +120.67 ± 12.41 0 3 79 166 2 +275.45 ± 38.39
468102 ncm-dbt-01 583070 500 227 47 226 +130.94 ± 12.37 0 3 67 177 3 +306.84 ± 41.99
468101 ncm-dbt-03 585379 500 225 38 237 +136.56 ± 12.98 0 5 58 182 5 +321.19 ± 45.36
468100 ncm-dbt-05 583740 500 213 42 245 +123.81 ± 12.54 0 4 73 171 2 +285.49 ± 40.16
468099 ncm-dbt-02 586520 500 225 42 233 +133.34 ± 12.69 0 3 66 176 5 +309.64 ± 42.33
468098 ncm-dbt-04 567324 500 225 36 239 +138.18 ± 12.93 1 5 50 192 2 +339.63 ± 48.85
468097 ncm-dbt-01 583196 500 229 40 231 +138.18 ± 12.53 0 0 69 173 8 +318.25 ± 40.94
468096 ncm-dbt-03 583531 500 227 52 221 +126.97 ± 13.04 0 4 72 169 5 +288.06 ± 40.46
468095 ncm-dbt-05 586266 500 220 40 240 +130.94 ± 12.17 1 1 66 181 1 +315.35 ± 42.24
468094 ncm-dbt-01 584243 500 220 40 240 +130.94 ± 11.96 0 1 71 175 3 +306.84 ± 40.47
468093 ncm-dbt-04 566691 500 216 35 249 +131.74 ± 11.94 0 0 73 173 4 +306.84 ± 39.69
468092 ncm-dbt-02 585885 500 222 46 232 +127.76 ± 12.84 0 5 67 175 3 +295.94 ± 42.08
468091 ncm-dbt-03 584159 500 227 35 238 +140.62 ± 11.81 0 2 57 188 3 +342.85 ± 45.71
468090 ncm-dbt-01 584369 500 220 32 248 +137.37 ± 13.15 0 8 49 190 3 +330.23 ± 49.05
468089 ncm-dbt-05 582318 500 229 43 228 +135.76 ± 12.21 0 1 67 177 5 +318.25 ± 41.77
468088 ncm-dbt-04 567958 500 227 43 230 +134.15 ± 12.47 0 2 67 176 5 +312.48 ± 41.9
468087 ncm-dbt-02 585379 500 229 48 223 +131.74 ± 13.12 1 3 64 178 4 +309.64 ± 43.08
468086 ncm-dbt-03 588004 500 225 40 235 +134.95 ± 12.84 0 4 62 179 5 +315.35 ± 43.81
468085 ncm-dbt-01 583237 500 218 45 237 +125.38 ± 12.89 0 3 76 166 5 +282.94 ± 39.21
468084 ncm-dbt-05 592374 500 229 39 232 +138.99 ± 12.7 0 2 63 178 7 +324.17 ± 43.32
468083 ncm-dbt-04 568673 500 214 39 247 +126.97 ± 12.85 0 2 77 165 6 +285.49 ± 38.83
468082 ncm-dbt-02 584117 500 230 42 228 +137.37 ± 12.15 0 3 59 185 3 +330.23 ± 44.94

Commit

Commit ID dd321af5dfc0789de07c4e5c64915073995eb818
Author Tony Wang
Date 2026-05-10 09:50:01 UTC
Updated main network to nn-83a0d6daf7e5.nnue Passed STC: https://tests.stockfishchess.org/tests/view/69f902413a3c3e525bb2b465 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 27264 W: 7199 L: 6895 D: 13170 Ptnml(0-2): 80, 3139, 6903, 3417, 93 Passed LTC: https://tests.stockfishchess.org/tests/view/69f98b103a3c3e525bb2b4f7 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 32352 W: 8509 L: 8200 D: 15643 Ptnml(0-2): 10, 3439, 8979, 3728, 20 Nettest Run https://gitlab.com/cscs-ci/ci-testing/webhook-ci/mirrors/5137461961076608/2926829081096545/-/pipelines/2496280249 Nettest PR: https://github.com/vondele/nettest/pull/329 Makes quite a few changes to the trainer. In particular recipe does not use a lambda (game score + outcome blending parameter) schedule for the most part. Accidentally dropped loss weighing parameters. Unclear how big the effect of that is closes https://github.com/official-stockfish/Stockfish/pull/6802 Bench: 2336177 Co-authored-by: Tony <Tony@secret.com>
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