Dev Builds » 20200317-1820

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 06:27:17 583933 4000 50 2613 1337 -263.86 ± 6.75 633 1298 68 1 0 -699.72 ± 42.05
ncm-dbt-02 06:27:48 585103 4000 54 2596 1350 -260.78 ± 6.72 620 1303 76 1 0 -680.57 ± 39.69
ncm-dbt-03 06:26:40 585749 4000 45 2613 1342 -264.6 ± 6.76 636 1297 66 1 0 -704.84 ± 42.71
ncm-dbt-04 06:24:30 567883 4000 56 2601 1343 -261.22 ± 6.66 618 1309 73 0 0 -692.29 ± 40.53
ncm-dbt-05 06:26:22 583292 4000 54 2590 1356 -259.91 ± 6.58 606 1325 68 1 0 -699.72 ± 42.05
20000 259 13013 6728 -262.07 ± 2.99 3113 6532 351 4 0 -695.23 ± 18.24

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
470065 ncm-dbt-01 580323 500 7 325 168 -261.07 ± 19.11 78 162 10 0 0 -676.04 ± 124.55
470064 ncm-dbt-03 584622 500 8 326 166 -261.07 ± 19.92 81 156 13 0 0 -629.41 ± 104.8
470063 ncm-dbt-02 585548 500 5 323 172 -261.07 ± 18.26 75 168 7 0 0 -739.05 ± 163.27
470062 ncm-dbt-05 584243 500 8 336 156 -272.99 ± 20.29 87 154 9 0 0 -694.7 ± 134.18
470061 ncm-dbt-04 567126 500 13 325 162 -254.15 ± 19.82 78 156 16 0 0 -592.27 ± 92.24
469286 ncm-dbt-02 585421 500 6 323 171 -259.9 ± 18.69 76 165 9 0 0 -694.7 ± 134.18
469285 ncm-dbt-01 585295 500 8 320 172 -254.15 ± 18.52 73 166 11 0 0 -659.13 ± 116.77
469284 ncm-dbt-05 585084 500 6 315 179 -250.76 ± 17.53 68 173 9 0 0 -694.7 ± 134.18
469283 ncm-dbt-03 583950 500 9 329 162 -263.41 ± 19.95 82 156 12 0 0 -643.67 ± 110.29
469282 ncm-dbt-04 568116 500 5 338 157 -279.16 ± 20.75 91 151 8 0 0 -715.51 ± 146.53
469281 ncm-dbt-03 586223 500 3 336 161 -279.16 ± 19.85 88 157 5 0 0 -798.18 ± 231.48
469280 ncm-dbt-05 579661 500 6 331 163 -269.36 ± 19.57 83 159 8 0 0 -715.51 ± 146.53
469279 ncm-dbt-02 585970 500 7 328 165 -264.59 ± 19.82 82 157 11 0 0 -659.13 ± 116.77
469278 ncm-dbt-04 568037 500 5 328 167 -266.96 ± 18.69 79 165 6 0 0 -766.17 ± 188.02
469277 ncm-dbt-01 585632 500 5 337 158 -277.92 ± 20.6 90 152 8 0 0 -715.51 ± 146.53
469276 ncm-dbt-03 587197 500 2 325 173 -266.96 ± 18.4 78 167 5 0 0 -798.18 ± 231.48
469275 ncm-dbt-05 585126 500 5 323 172 -261.07 ± 18.26 75 168 7 0 0 -739.05 ± 163.27
469274 ncm-dbt-04 567561 500 9 321 170 -254.15 ± 18.78 74 164 12 0 0 -643.67 ± 110.29
469273 ncm-dbt-02 581985 500 6 310 184 -245.19 ± 17.63 66 172 12 0 0 -643.67 ± 110.29
469272 ncm-dbt-01 583782 500 7 330 163 -266.96 ± 19.84 83 157 10 0 0 -676.04 ± 124.55
469271 ncm-dbt-05 585295 500 5 316 179 -253.02 ± 17.82 70 171 9 0 0 -694.7 ± 134.18
469270 ncm-dbt-04 568554 500 7 324 169 -259.9 ± 18.69 76 165 9 0 0 -694.7 ± 134.18
469269 ncm-dbt-03 586012 500 5 322 173 -259.9 ± 18.41 75 167 8 0 0 -715.51 ± 146.53
469268 ncm-dbt-02 583992 500 7 322 171 -257.59 ± 18.4 74 167 9 0 0 -694.7 ± 134.18
469267 ncm-dbt-01 586097 500 6 333 161 -271.78 ± 19.57 84 159 7 0 0 -739.05 ± 163.27
469266 ncm-dbt-04 567640 500 7 319 174 -254.15 ± 17.68 70 172 8 0 0 -715.51 ± 146.53
469265 ncm-dbt-05 580572 500 10 327 163 -259.9 ± 19.24 78 161 11 0 0 -659.13 ± 116.77
469264 ncm-dbt-03 585801 500 9 322 169 -255.3 ± 19.46 76 162 11 1 0 -629.43 ± 115.29
469263 ncm-dbt-01 583279 500 4 319 177 -257.59 ± 17.83 72 171 7 0 0 -739.05 ± 163.27
469262 ncm-dbt-02 584874 500 7 340 153 -279.17 ± 21.6 93 148 8 1 0 -676.08 ± 142.43
469261 ncm-dbt-05 584832 500 7 322 171 -257.59 ± 17.83 72 171 7 0 0 -739.05 ± 163.27
469260 ncm-dbt-04 567601 500 7 322 171 -257.59 ± 18.4 74 167 9 0 0 -694.7 ± 134.18
469259 ncm-dbt-03 586181 500 7 330 163 -266.96 ± 19.28 81 161 8 0 0 -715.51 ± 146.53
469258 ncm-dbt-02 587367 500 10 324 166 -256.44 ± 19.07 76 162 12 0 0 -643.67 ± 110.29
469257 ncm-dbt-01 583405 500 9 326 165 -259.9 ± 18.97 77 163 10 0 0 -676.04 ± 124.55
469256 ncm-dbt-04 568434 500 3 324 173 -264.59 ± 18.11 76 169 5 0 0 -798.18 ± 231.48
469255 ncm-dbt-05 581527 500 7 320 173 -255.3 ± 18.66 73 168 8 1 0 -676.08 ± 142.43
469254 ncm-dbt-02 585674 500 6 326 168 -263.41 ± 18.84 78 164 8 0 0 -715.51 ± 146.53
469253 ncm-dbt-03 586012 500 2 323 175 -264.59 ± 17.81 75 171 4 0 0 -837.28 ± 240.94
469252 ncm-dbt-01 583656 500 4 323 173 -262.24 ± 18.69 76 168 5 1 0 -739.1 ± 208.89

Commit

Commit ID 07caca2587d3090921b99f37fa8c9bf6a29a89af
Author Stéphane Nicolet
Date 2020-03-17 18:20:37 UTC
Anchored bishops Reduce the "bad bishop" penalty when the bishop is protected by one of our pawns, as it may indicate that the bishop has found a safe spot outside the pawn chain. STC: LLR: 2.94 (-2.94,2.94) {-0.50,1.50} Total: 176942 W: 34142 L: 33696 D: 109104 Ptnml(0-2): 3129, 20422, 40919, 20876, 3125 http://tests.stockfishchess.org/tests/view/5e6f61aae42a5c3b3ca2e62d LTC: LLR: 2.95 (-2.94,2.94) {0.25,1.75} Total: 42252 W: 5615 L: 5322 D: 31315 Ptnml(0-2): 308, 3881, 12500, 4084, 353 http://tests.stockfishchess.org/tests/view/5e701382e42a5c3b3ca2e661 closes https://github.com/official-stockfish/Stockfish/pull/2587 Bench: 4963440
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