Dev Builds » 20260318-1949

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 06:41:04 581747 4000 1750 342 1908 +127.76 ± 4.45 0 24 574 1372 30 +293.95 ± 14.17
ncm-dbt-02 06:41:03 585860 3996 1750 347 1899 +127.4 ± 4.48 0 30 562 1379 27 +293.74 ± 14.35
ncm-dbt-03 06:41:53 584518 4006 1765 334 1907 +129.83 ± 4.51 0 25 560 1380 38 +298.26 ± 14.36
ncm-dbt-04 06:41:13 566685 3998 1746 380 1872 +123.68 ± 4.64 0 44 574 1352 29 +280.95 ± 14.22
ncm-dbt-05 06:40:25 581018 4000 1739 377 1884 +123.22 ± 4.58 0 40 583 1352 25 +280.74 ± 14.1
20000 8750 1780 9470 +126.37 ± 2.03 0 163 2853 6835 149 +289.42 ± 6.36

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
460209 ncm-dbt-03 581943 6 3 0 3 +190.46 ± 18.51 0 0 0 3 0 +1199.83 ± 276.48
460208 ncm-dbt-04 567126 498 221 46 231 +127.52 ± 12.87 0 5 67 174 3 +295.12 ± 42.07
460207 ncm-dbt-01 583363 500 226 42 232 +134.15 ± 13.8 0 2 74 162 12 +293.29 ± 39.69
460206 ncm-dbt-02 585506 496 222 46 228 +128.89 ± 11.88 0 1 72 173 2 +302.43 ± 40.15
460205 ncm-dbt-05 584579 500 232 47 221 +134.95 ± 12.64 0 5 58 184 3 +321.19 ± 45.36
460204 ncm-dbt-03 581985 500 217 37 246 +130.94 ± 12.56 0 3 68 175 4 +304.07 ± 41.65
460203 ncm-dbt-04 566572 500 226 49 225 +128.55 ± 12.24 0 4 66 179 1 +304.07 ± 42.38
460202 ncm-dbt-01 581070 500 212 35 253 +128.55 ± 12.82 0 3 72 170 5 +293.29 ± 40.39
460201 ncm-dbt-02 587113 500 217 44 239 +125.38 ± 13.25 0 6 69 171 4 +285.49 ± 41.44
460200 ncm-dbt-03 583824 500 223 39 238 +134.15 ± 12.67 0 4 62 180 4 +315.35 ± 43.81
460199 ncm-dbt-05 586350 500 218 47 235 +123.81 ± 13.28 0 4 77 163 6 +275.45 ± 39.01
460198 ncm-dbt-01 580489 500 223 47 230 +127.76 ± 11.44 0 1 72 177 0 +304.07 ± 40.16
460197 ncm-dbt-04 567759 500 218 45 237 +125.38 ± 13.07 0 5 71 170 4 +285.49 ± 40.81
460196 ncm-dbt-02 584790 500 226 53 221 +125.38 ± 12.89 0 5 70 172 3 +288.06 ± 41.11
460195 ncm-dbt-05 582987 500 220 45 235 +126.97 ± 12.85 0 5 68 174 3 +293.29 ± 41.75
460194 ncm-dbt-03 586858 500 235 38 227 +144.71 ± 12.05 0 0 60 183 7 +346.11 ± 44.19
460193 ncm-dbt-01 580821 500 214 44 242 +123.02 ± 12.74 0 5 72 171 2 +282.94 ± 40.5
460192 ncm-dbt-02 585548 500 216 44 240 +124.6 ± 11.74 0 1 77 171 1 +290.66 ± 38.7
460191 ncm-dbt-04 562768 500 219 55 226 +118.33 ± 13.86 0 8 75 162 5 +261.07 ± 39.69
460190 ncm-dbt-05 576905 500 209 45 246 +118.33 ± 13.35 0 7 75 165 3 +265.78 ± 39.69
460189 ncm-dbt-03 584958 500 222 40 238 +132.54 ± 12.52 0 2 69 174 5 +306.84 ± 41.23
460188 ncm-dbt-01 582987 500 214 44 242 +123.02 ± 12.74 0 6 69 174 1 +285.49 ± 41.44
460187 ncm-dbt-02 586520 500 211 38 251 +125.38 ± 12.7 0 4 72 171 3 +288.06 ± 40.46
460186 ncm-dbt-05 579413 500 212 44 244 +121.45 ± 12.77 0 5 74 169 2 +277.93 ± 39.92
460185 ncm-dbt-04 566691 500 203 41 256 +116.77 ± 13.19 0 5 82 159 4 +258.75 ± 37.76
460184 ncm-dbt-03 584034 500 208 42 250 +119.89 ± 12.98 0 5 77 165 3 +270.57 ± 39.07
460183 ncm-dbt-01 581902 500 224 40 236 +134.15 ± 12.67 0 3 65 177 5 +312.48 ± 42.67
460182 ncm-dbt-02 584706 500 210 47 243 +117.55 ± 12.64 0 5 78 166 1 +268.17 ± 38.8
460181 ncm-dbt-05 578054 500 224 45 231 +130.14 ± 12.39 0 3 68 176 3 +304.07 ± 41.65
460180 ncm-dbt-04 568991 500 222 45 233 +128.55 ± 13.38 0 5 69 170 6 +290.66 ± 41.43
460179 ncm-dbt-03 585717 500 226 41 233 +134.95 ± 13.03 0 3 66 174 7 +309.64 ± 42.33
460178 ncm-dbt-01 581236 500 215 38 247 +128.55 ± 12.04 0 2 71 175 2 +301.33 ± 40.6
460177 ncm-dbt-02 585674 500 216 28 256 +137.37 ± 13.15 0 5 58 181 6 +321.19 ± 45.36
460176 ncm-dbt-04 566612 500 211 53 236 +113.68 ± 13.55 0 8 79 160 3 +251.89 ± 38.63
460175 ncm-dbt-05 579124 500 205 51 244 +110.6 ± 12.88 0 6 85 158 1 +247.41 ± 37.09
460174 ncm-dbt-03 585506 500 223 54 223 +122.24 ± 12.57 0 2 81 163 4 +275.45 ± 37.75
460173 ncm-dbt-02 587028 500 232 47 221 +134.95 ± 13.03 0 3 66 174 7 +309.64 ± 42.33
460172 ncm-dbt-01 582110 500 222 52 226 +123.02 ± 12.37 0 2 79 166 3 +280.42 ± 38.28
460171 ncm-dbt-04 566967 500 226 46 228 +130.94 ± 12.56 0 4 65 178 3 +306.84 ± 42.73
460170 ncm-dbt-05 580738 500 219 53 228 +119.89 ± 13.16 0 5 78 163 4 +268.17 ± 38.8
460169 ncm-dbt-03 585843 500 208 43 249 +119.11 ± 13.34 0 6 77 163 4 +265.78 ± 39.12

Commit

Commit ID 3c04b5c4297c26b0dac9fa4ffc158c47a87a24cf
Author MARLIN-Tools
Date 2026-03-18 19:49:06 UTC
Fix Depth 1 bug at very low time controls, some fishtesting workers, and delayed move senders like Arena. Non-Regression STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 98208 W: 25423 L: 25276 D: 47509 Ptnml(0-2): 271, 10713, 26994, 10850, 276 https://tests.stockfishchess.org/tests/view/69ad43c21d849c824c6afe82 - Hell VVSTC (0.2+0.02) LLR: 2.70 (-2.94,2.94) <0.00,2.00> Total: 688 W: 660 L: 11 D: 17 Ptnml(0-2): 1, 0, 10, 15, 318 https://tests.stockfishchess.org/tests/view/69ae4bea1d849c824c6b00b0 - Sudden Death (1+0) LLR: 2.19 (-2.94,2.94) <-1.75,0.25> Total: 538 W: 536 L: 0 D: 2 Ptnml(0-2): 0, 0, 0, 2, 267 https://tests.stockfishchess.org/tests/live_elo/69ae6c031d849c824c6b00dc - Sudden Death (5+0) LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 22248 W: 6058 L: 5802 D: 10388 Ptnml(0-2): 214, 2420, 5583, 2710, 197 https://tests.stockfishchess.org/tests/view/69ae6dd01d849c824c6b00ee - Fixes #6639 closes https://github.com/official-stockfish/Stockfish/pull/6659 No functional change
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