Dev Builds » 20250224-1801

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 06:48:13 585275 3994 1585 524 1885 +94.56 ± 4.92 1 88 777 1111 20 +201.09 ± 12.19
ncm-dbt-02 06:46:29 587509 4000 1610 523 1867 +96.85 ± 4.91 1 85 761 1132 21 +206.73 ± 12.33
ncm-dbt-03 06:47:56 587123 4016 1593 494 1929 +97.56 ± 4.85 0 81 768 1138 21 +208.37 ± 12.26
ncm-dbt-04 06:46:21 570440 4000 1609 500 1891 +98.92 ± 4.87 1 80 747 1153 19 +212.61 ± 12.44
ncm-dbt-05 06:47:45 585260 3990 1596 498 1896 +98.14 ± 4.79 0 67 785 1121 22 +209.59 ± 12.09
20000 7993 2539 9468 +97.2 ± 2.18 3 401 3838 5655 103 +207.66 ± 5.48

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
401975 ncm-dbt-03 586435 16 7 1 8 +136.86 ± 96.14 0 0 3 4 1 +254.61 ± 287.37
401974 ncm-dbt-01 586477 494 202 68 224 +96.66 ± 14.38 0 12 93 138 4 +203.26 ± 35.5
401973 ncm-dbt-05 586562 490 198 75 217 +89.12 ± 14.02 0 13 97 134 1 +189.9 ± 34.72
401972 ncm-dbt-02 588515 500 200 62 238 +98.44 ± 13.98 0 10 96 140 4 +207.95 ± 34.86
401971 ncm-dbt-04 568434 500 194 66 240 +90.96 ± 14.17 0 15 93 141 1 +194.57 ± 35.52
401970 ncm-dbt-03 587240 500 195 62 243 +94.69 ± 14.24 0 14 91 143 2 +202.15 ± 35.92
401969 ncm-dbt-05 585717 500 199 62 239 +97.69 ± 13.01 0 7 100 142 1 +211.87 ± 33.93
401968 ncm-dbt-01 585379 500 198 68 234 +92.45 ± 13.59 0 8 108 130 4 +192.71 ± 32.52
401967 ncm-dbt-04 571391 500 186 64 250 +86.52 ± 13.16 0 9 111 129 1 +183.51 ± 32.06
401966 ncm-dbt-02 582277 500 202 55 243 +105.25 ± 14.04 0 10 87 149 4 +226.0 ± 36.75
401965 ncm-dbt-03 588004 500 194 50 256 +102.97 ± 14.02 0 9 93 143 5 +217.85 ± 35.44
401964 ncm-dbt-05 582569 500 206 55 239 +108.3 ± 13.89 0 9 85 152 4 +234.38 ± 37.19
401963 ncm-dbt-01 585632 500 201 64 235 +97.69 ± 13.5 1 7 97 144 1 +213.85 ± 34.58
401962 ncm-dbt-02 586731 500 207 79 214 +90.97 ± 15.19 1 15 94 135 5 +189.0 ± 35.33
401961 ncm-dbt-04 570509 500 194 51 255 +102.22 ± 13.54 0 10 88 151 1 +223.94 ± 36.53
401960 ncm-dbt-03 586477 500 197 64 239 +94.69 ± 13.93 0 10 101 135 4 +198.34 ± 33.9
401959 ncm-dbt-05 585843 500 191 62 247 +91.71 ± 13.09 0 9 103 138 0 +198.34 ± 33.48
401958 ncm-dbt-01 584579 500 184 71 245 +79.9 ± 14.21 0 17 104 128 1 +167.53 ± 33.52
401957 ncm-dbt-02 588515 500 194 70 236 +88.0 ± 13.35 0 11 104 135 0 +189.0 ± 33.39
401956 ncm-dbt-04 572074 500 200 69 231 +93.2 ± 14.51 1 14 89 145 1 +202.15 ± 36.32
401955 ncm-dbt-03 585211 500 200 65 235 +96.19 ± 12.99 0 7 102 140 1 +207.95 ± 33.55
401954 ncm-dbt-05 586520 500 210 60 230 +107.54 ± 13.23 0 5 94 147 4 +232.26 ± 35.0
401953 ncm-dbt-02 589411 500 202 63 235 +99.2 ± 13.51 0 9 95 144 2 +213.85 ± 35.03
401952 ncm-dbt-01 585548 500 203 63 234 +99.95 ± 14.15 0 11 92 143 4 +211.87 ± 35.7
401951 ncm-dbt-04 570188 500 203 60 237 +102.22 ± 13.86 0 10 90 147 3 +219.87 ± 36.1
401950 ncm-dbt-03 586646 500 207 74 219 +94.69 ± 13.46 0 10 98 141 1 +204.07 ± 34.47
401949 ncm-dbt-02 589027 500 204 68 228 +96.94 ± 13.16 0 8 99 142 1 +209.91 ± 34.19
401948 ncm-dbt-04 569989 500 209 53 238 +112.14 ± 14.85 0 13 74 157 6 +240.82 ± 39.83
401947 ncm-dbt-05 584832 500 188 61 251 +90.22 ± 14.01 0 10 108 127 5 +185.33 ± 32.63
401946 ncm-dbt-01 585717 500 199 58 243 +100.7 ± 13.85 0 11 89 148 2 +217.85 ± 36.33
401945 ncm-dbt-03 587792 500 189 61 250 +90.96 ± 14.02 0 12 101 134 3 +190.85 ± 33.97
401944 ncm-dbt-04 569470 500 217 68 215 +106.77 ± 12.88 0 3 99 144 4 +230.16 ± 33.79
401943 ncm-dbt-02 585674 500 199 63 238 +96.94 ± 13.96 0 12 92 144 2 +207.95 ± 35.71
401942 ncm-dbt-01 585337 500 201 64 235 +97.69 ± 13.34 0 8 99 141 2 +209.91 ± 34.19
401941 ncm-dbt-05 584622 500 199 62 239 +97.69 ± 13.01 0 7 100 142 1 +211.87 ± 33.93
401940 ncm-dbt-03 587622 500 216 62 222 +110.6 ± 13.05 0 5 89 153 3 +243.0 ± 36.1
401939 ncm-dbt-02 589924 500 202 63 235 +99.2 ± 13.83 0 10 94 143 3 +211.87 ± 35.26
401938 ncm-dbt-04 571471 500 206 69 225 +97.69 ± 13.01 0 6 103 139 2 +209.91 ± 33.29
401937 ncm-dbt-05 585421 500 205 61 234 +102.97 ± 13.87 0 7 98 139 6 +215.85 ± 34.33
401936 ncm-dbt-01 583531 500 197 68 235 +91.71 ± 14.19 0 14 95 139 2 +194.57 ± 35.13
401935 ncm-dbt-03 588686 500 188 55 257 +94.69 ± 14.09 0 14 90 145 1 +204.07 ± 36.13

Commit

Commit ID e9997afb1cb046ed1812974f27c532f6e4d8dbcc
Author Carlos Esparza
Date 2025-02-24 18:01:23 UTC
Replace hint_common_parent_position() by backwards accumulator updates Only calls to `evaluate()` now trigger NNUE accumulator updates. To make sure that we are likely to find parent positions from which to update the accumulators we perform a backwards NNUE update whenever we compute the accumulator from scratch for some position. passed STC LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 39680 W: 10474 L: 10164 D: 19042 Ptnml(0-2): 171, 4068, 11042, 4398, 161 https://tests.stockfishchess.org/tests/view/67a27f26eb183d11c65945be passed LTC LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 337308 W: 86408 L: 85550 D: 165350 Ptnml(0-2): 276, 30551, 106126, 31441, 260 https://tests.stockfishchess.org/tests/view/67a287efeb183d11c65945ee then simplified: STC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 28608 W: 7641 L: 7413 D: 13554 Ptnml(0-2): 132, 3036, 7744, 3256, 136 https://tests.stockfishchess.org/tests/view/67a4703719f522d3866d3345 LTC LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 200226 W: 51026 L: 50990 D: 98210 Ptnml(0-2): 170, 18468, 62799, 18508, 168 https://tests.stockfishchess.org/tests/view/67a4f255229c1a170cc08964 The version in this PR is a bit different from the simplified version, but it's compile-time changes only. closes https://github.com/official-stockfish/Stockfish/pull/5870 No functional change
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