Dev Builds » 20200521-1205

Use this dev build

NCM plays each Stockfish dev build 20,000 times against Stockfish 7. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.

Summary

Host Duration Avg Base NPS Games Wins Losses Draws Elo
ncm-et-3 08:28:37 1961560 3309 2102 57 1150 +250.77 +/- 9.97
ncm-et-4 08:28:34 1965596 3326 2080 50 1196 +246.49 +/- 9.74
ncm-et-9 08:28:43 1969207 3360 2094 48 1218 +245.71 +/- 9.65
ncm-et-10 08:28:32 1961571 3323 2100 39 1184 +252.02 +/- 9.78
ncm-et-13 08:28:21 1961428 3340 2097 53 1190 +247.4 +/- 9.78
ncm-et-15 08:28:31 1967500 3342 2128 40 1174 +254.6 +/- 9.83
20000 12601 287 7112 +249.48 +/- 3.99

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
131365 ncm-et-3 2020-05-22 10:44 00:47:14 1962611 309 197 6 106 +250.84 +/- 33.08
131364 ncm-et-4 2020-05-22 10:41 00:50:27 1948618 326 201 2 123 +246.54 +/- 30.22
131363 ncm-et-10 2020-05-22 10:41 00:50:37 1958323 323 200 4 119 +244.55 +/- 30.95
131362 ncm-et-13 2020-05-22 10:40 00:51:04 1959849 340 222 6 112 +260.66 +/- 32.2
131361 ncm-et-15 2020-05-22 10:39 00:52:05 1958319 342 222 3 117 +263.62 +/- 31.26
131360 ncm-et-9 2020-05-22 10:36 00:54:46 1970637 360 225 5 130 +246.92 +/- 29.66
131359 ncm-et-3 2020-05-22 09:27 01:16:11 1964148 500 315 8 177 +248.53 +/- 25.45
131358 ncm-et-10 2020-05-22 09:23 01:16:08 1963845 500 319 8 173 +253.02 +/- 25.77
131357 ncm-et-4 2020-05-22 09:23 01:16:27 1973582 500 310 9 181 +241.91 +/- 25.17
131356 ncm-et-13 2020-05-22 09:23 01:15:59 1960767 500 328 9 163 +262.24 +/- 26.65
131355 ncm-et-15 2020-05-22 09:22 01:15:46 1976383 500 302 5 193 +237.58 +/- 24.13
131354 ncm-et-9 2020-05-22 09:18 01:17:22 1963993 500 304 5 191 +239.74 +/- 24.27
131353 ncm-et-3 2020-05-22 08:09 01:16:19 1962148 500 325 6 169 +262.24 +/- 26.04
131352 ncm-et-13 2020-05-22 08:06 01:15:51 1961537 500 322 9 169 +255.3 +/- 26.13
131351 ncm-et-10 2020-05-22 08:06 01:16:39 1962929 500 311 2 187 +250.77 +/- 24.43
131350 ncm-et-4 2020-05-22 08:06 01:16:22 1964917 500 310 10 180 +240.82 +/- 25.27
131349 ncm-et-15 2020-05-22 08:05 01:16:32 1961112 500 320 6 174 +256.44 +/- 25.62
131348 ncm-et-9 2020-05-22 08:01 01:15:38 1970788 500 310 6 184 +245.2 +/- 24.83
131347 ncm-et-3 2020-05-22 06:50 01:17:51 1958470 500 320 9 171 +253.02 +/- 25.97
131346 ncm-et-10 2020-05-22 06:49 01:15:31 1969859 500 324 6 170 +261.07 +/- 25.96
131345 ncm-et-13 2020-05-22 06:49 01:16:14 1964156 500 305 4 191 +241.91 +/- 24.23
131344 ncm-et-4 2020-05-22 06:48 01:16:36 1966304 500 313 5 182 +249.64 +/- 24.95
131343 ncm-et-15 2020-05-22 06:46 01:17:56 1969256 500 328 9 163 +262.24 +/- 26.65
131342 ncm-et-9 2020-05-22 06:44 01:15:49 1964775 500 301 9 190 +232.26 +/- 24.49
131341 ncm-et-3 2020-05-22 05:33 01:16:35 1961234 500 328 13 159 +257.59 +/- 27.08
131340 ncm-et-13 2020-05-22 05:31 01:16:16 1960614 500 311 9 180 +243.0 +/- 25.24
131339 ncm-et-10 2020-05-22 05:30 01:17:31 1957713 500 304 5 191 +239.74 +/- 24.27
131338 ncm-et-4 2020-05-22 05:30 01:16:39 1968322 500 292 9 199 +222.92 +/- 23.85
131337 ncm-et-15 2020-05-22 05:30 01:14:45 1970180 500 324 5 171 +262.24 +/- 25.83
131336 ncm-et-9 2020-05-22 05:28 01:15:19 1974056 500 321 6 173 +257.59 +/- 25.71
131335 ncm-et-13 2020-05-22 04:14 01:16:04 1959541 500 305 6 189 +239.74 +/- 24.46
131334 ncm-et-3 2020-05-22 04:14 01:17:26 1963225 500 312 7 181 +246.3 +/- 25.1
131333 ncm-et-4 2020-05-22 04:13 01:15:46 1970496 500 324 7 169 +259.91 +/- 26.07
131332 ncm-et-15 2020-05-22 04:12 01:16:27 1967851 500 322 8 170 +256.44 +/- 26.02
131331 ncm-et-9 2020-05-22 04:12 01:14:59 1968629 500 312 8 180 +245.2 +/- 25.21
131330 ncm-et-10 2020-05-22 04:11 01:17:58 1957553 500 324 3 173 +264.6 +/- 25.58
131329 ncm-et-15 2020-05-22 02:56 01:15:00 1969399 500 310 4 186 +247.41 +/- 24.6
131328 ncm-et-10 2020-05-22 02:56 01:14:08 1960775 500 318 11 171 +248.53 +/- 26.02
131327 ncm-et-13 2020-05-22 02:56 01:16:53 1963532 500 304 10 186 +234.38 +/- 24.81
131326 ncm-et-9 2020-05-22 02:56 01:14:50 1971572 500 321 9 170 +254.16 +/- 26.05
131325 ncm-et-3 2020-05-22 02:56 01:17:01 1959085 500 305 8 187 +237.58 +/- 24.68
131324 ncm-et-4 2020-05-22 02:56 01:16:17 1966936 500 330 8 162 +265.78 +/- 26.71

Commit

Commit ID 6c1af710d16c6a358cc09c51a133120605c39e44
Author Stéphane Nicolet
Date 2020-05-21 12:05:07 UTC
A combo of parameters tweaks This patch is a combinaison of two recent parameters tweaks which had failed narrowly (yellow) at long time control: • improvement in move ordering during search by softening the distinction between bad captures and good captures during move generation, leading to improved awareness of Stockfish of potential piece sacrifices (idea by Rahul Dsilva) • increase in the weight of pawns in the "initiative" part of the evaluation function. With this change Stockfish should have more incentive to exchange pawns when losing, and to keep pawns when winning. STC: LLR: 2.93 (-2.94,2.94) {-0.50,1.50} Total: 10704 W: 2178 L: 1974 D: 6552 Ptnml(0-2): 168, 1185, 2464, 1345, 190 https://tests.stockfishchess.org/tests/view/5ec5553b377121ac09e1023d LTC: LLR: 2.94 (-2.94,2.94) {0.25,1.75} Total: 60592 W: 7835 L: 7494 D: 45263 Ptnml(0-2): 430, 5514, 18086, 5817, 449 https://tests.stockfishchess.org/tests/view/5ec55ca2377121ac09e10249 Closes https://github.com/official-stockfish/Stockfish/pull/2691 Bench: 4519117
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