Dev Builds » 20190714-1240

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 08:32:54 1966358 3337 1982 71 1284 +226.35 +/- 9.41
ncm-et-4 08:33:01 1963910 3322 1941 62 1319 +222.73 +/- 9.25
ncm-et-9 08:33:01 1973754 3358 2016 81 1261 +228.2 +/- 9.52
ncm-et-10 08:32:56 1968659 3315 1957 65 1293 +225.35 +/- 9.36
ncm-et-13 08:33:13 1970396 3346 2019 65 1262 +232.25 +/- 9.49
ncm-et-15 08:33:01 1974609 3322 1992 56 1274 +231.62 +/- 9.42
20000 11907 400 7693 +227.74 +/- 3.84

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
89192 ncm-et-10 2019-07-16 17:05 00:48:39 1970239 315 186 5 124 +227.35 +/- 30.25
89191 ncm-et-4 2019-07-16 17:04 00:50:02 1964156 322 180 6 136 +210.09 +/- 28.77
89190 ncm-et-15 2019-07-16 17:04 00:50:09 1969403 322 196 4 122 +238.81 +/- 30.51
89189 ncm-et-3 2019-07-16 17:03 00:50:56 1966769 337 195 12 130 +211.39 +/- 29.87
89188 ncm-et-13 2019-07-16 17:01 00:52:56 1971408 346 215 9 122 +238.32 +/- 30.86
89187 ncm-et-9 2019-07-16 17:00 00:54:16 1981416 358 236 7 115 +263.22 +/- 31.83
89186 ncm-et-10 2019-07-16 15:47 01:17:13 1972406 500 310 9 181 +241.91 +/- 25.17
89185 ncm-et-15 2019-07-16 15:46 01:16:26 1966769 500 330 9 161 +264.6 +/- 26.83
89184 ncm-et-3 2019-07-16 15:45 01:17:18 1965996 500 303 9 188 +234.38 +/- 24.64
89183 ncm-et-4 2019-07-16 15:44 01:18:31 1963536 500 300 9 191 +231.21 +/- 24.42
89182 ncm-et-13 2019-07-16 15:44 01:16:10 1967848 500 303 7 190 +236.51 +/- 24.42
89181 ncm-et-9 2019-07-16 15:42 01:16:23 1975763 500 290 12 198 +217.85 +/- 24.01
89180 ncm-et-15 2019-07-16 14:28 01:17:14 1973902 500 288 10 202 +217.85 +/- 23.68
89179 ncm-et-3 2019-07-16 14:27 01:16:36 1965688 500 308 12 180 +236.51 +/- 25.32
89178 ncm-et-10 2019-07-16 14:27 01:19:02 1991772 500 296 17 187 +218.86 +/- 24.89
89177 ncm-et-4 2019-07-16 14:25 01:18:10 1967231 500 285 3 212 +221.9 +/- 22.74
89176 ncm-et-13 2019-07-16 14:25 01:17:48 1973429 500 291 16 193 +214.85 +/- 24.44
89175 ncm-et-9 2019-07-16 14:23 01:17:58 1969093 500 296 17 187 +218.86 +/- 24.89
89174 ncm-et-3 2019-07-16 13:10 01:16:15 1961382 500 306 4 190 +243.0 +/- 24.3
89173 ncm-et-15 2019-07-16 13:10 01:17:25 1982199 500 297 8 195 +229.12 +/- 24.1
89172 ncm-et-10 2019-07-16 13:09 01:16:25 1961537 500 277 7 216 +209.91 +/- 22.66
89171 ncm-et-13 2019-07-16 13:08 01:16:19 1969240 500 304 5 191 +239.74 +/- 24.27
89170 ncm-et-4 2019-07-16 13:08 01:16:29 1962457 500 281 8 211 +212.86 +/- 23.02
89169 ncm-et-9 2019-07-16 13:07 01:15:09 1976245 500 295 10 195 +224.97 +/- 24.16
89168 ncm-et-15 2019-07-16 11:52 01:16:52 1972503 500 300 8 192 +232.26 +/- 24.31
89167 ncm-et-3 2019-07-16 11:52 01:17:00 1969867 500 292 6 202 +226.0 +/- 23.54
89166 ncm-et-10 2019-07-16 11:51 01:16:56 1962310 500 304 5 191 +239.74 +/- 24.27
89165 ncm-et-13 2019-07-16 11:51 01:15:49 1971258 500 304 7 189 +237.58 +/- 24.5
89164 ncm-et-4 2019-07-16 11:50 01:16:32 1962462 500 294 9 197 +224.97 +/- 23.99
89163 ncm-et-9 2019-07-16 11:50 01:16:06 1963997 500 310 11 179 +239.74 +/- 25.37
89162 ncm-et-10 2019-07-16 10:34 01:16:18 1961090 500 293 4 203 +229.12 +/- 23.39
89161 ncm-et-3 2019-07-16 10:33 01:17:22 1975709 500 289 13 198 +215.85 +/- 24.03
89160 ncm-et-13 2019-07-16 10:33 01:17:08 1965382 500 297 9 194 +228.08 +/- 24.2
89159 ncm-et-4 2019-07-16 10:33 01:16:18 1964919 500 300 14 186 +226.0 +/- 24.91
89158 ncm-et-15 2019-07-16 10:33 01:18:01 1981578 500 284 12 204 +211.87 +/- 23.6
89157 ncm-et-9 2019-07-16 10:32 01:17:18 1981449 500 285 14 201 +210.89 +/- 23.85
89156 ncm-et-9 2019-07-16 09:15 01:15:51 1968321 500 304 10 186 +234.38 +/- 24.81
89155 ncm-et-3 2019-07-16 09:15 01:17:27 1959095 500 289 15 196 +213.85 +/- 24.22
89154 ncm-et-4 2019-07-16 09:15 01:16:59 1962610 500 301 13 186 +228.08 +/- 24.89
89153 ncm-et-10 2019-07-16 09:15 01:18:23 1961265 500 291 18 191 +212.86 +/- 24.62
89152 ncm-et-13 2019-07-16 09:15 01:17:03 1974210 500 305 12 183 +233.32 +/- 25.09
89151 ncm-et-15 2019-07-16 09:15 01:16:54 1975915 500 297 5 198 +232.26 +/- 23.77

Commit

Commit ID a0360cc2d4397edaad590cdf131fef95915b55c0
Author 31m059
Date 2019-07-14 12:40:45 UTC
Linear formula for w. Bench: 3328507 (#2239) In Stockfish, both the middlegame and endgame bonus for a passed pawn are calculated as a product of two factors. The first is k, chosen based on the presence of defended and unsafe squares. The second is w, a quadratic function of the pawn's rank. Both are only applied if the pawn's relative rank is at least RANK_4. It does not appear that the complexity of a quadratic function is necessary for w. Here, we replace it with a simpler linear one, which performs equally at both STC and LTC. STC: LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 46814 W: 10386 L: 10314 D: 26114 http://tests.stockfishchess.org/tests/view/5d29686e0ebc5925cf0d76a1 LTC: LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 82372 W: 13845 L: 13823 D: 54704 http://tests.stockfishchess.org/tests/view/5d2980650ebc5925cf0d7bfd Bench: 3328507
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