Dev Builds » 20190915-2337

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 08:30:58 1975425 3346 2004 52 1290 +231.94 +/- 9.35
ncm-et-4 08:29:11 1973354 3324 2041 80 1203 +235.42 +/- 9.76
ncm-et-9 08:32:22 1974816 3329 2038 55 1236 +238.49 +/- 9.58
ncm-et-10 08:31:13 1966333 3337 1993 74 1270 +227.59 +/- 9.47
ncm-et-13 08:29:07 1975065 3319 1996 76 1247 +229.37 +/- 9.57
ncm-et-15 08:32:13 1969300 3345 1980 57 1308 +227.5 +/- 9.28
20000 12052 394 7554 +231.69 +/- 3.88

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
96355 ncm-et-4 2019-09-17 06:10 00:31:38 1970654 207 131 3 73 +250.97 +/- 39.82
96354 ncm-et-9 2019-09-17 06:10 00:32:03 1980789 214 128 1 85 +237.29 +/- 36.24
96353 ncm-et-13 2019-09-17 06:10 00:32:12 1970790 210 115 6 89 +199.79 +/- 35.85
96352 ncm-et-10 2019-09-17 06:08 00:34:08 1962303 219 124 4 91 +213.83 +/- 35.29
96351 ncm-et-15 2019-09-17 06:07 00:35:07 1966935 228 125 7 96 +199.07 +/- 34.56
96350 ncm-et-3 2019-09-17 06:06 00:36:01 1985197 233 137 3 93 +227.61 +/- 34.88
96349 ncm-et-13 2019-09-17 04:52 01:16:38 1970963 500 303 11 186 +232.26 +/- 24.84
96348 ncm-et-4 2019-09-17 04:52 01:17:40 1969400 500 305 7 188 +238.66 +/- 24.57
96347 ncm-et-9 2019-09-17 04:51 01:17:48 1970331 500 311 8 181 +244.1 +/- 25.14
96346 ncm-et-10 2019-09-17 04:50 01:16:57 1967391 500 300 15 185 +224.97 +/- 25.0
96345 ncm-et-15 2019-09-17 04:49 01:16:57 1976543 500 301 9 190 +232.26 +/- 24.49
96344 ncm-et-3 2019-09-17 04:48 01:16:19 1969576 500 294 10 196 +223.94 +/- 24.09
96343 ncm-et-4 2019-09-17 03:35 01:15:54 1974530 500 306 16 178 +230.16 +/- 25.54
96342 ncm-et-13 2019-09-17 03:34 01:16:43 1977934 500 297 10 193 +227.04 +/- 24.3
96341 ncm-et-9 2019-09-17 03:33 01:16:52 1988999 500 286 14 200 +211.87 +/- 23.92
96340 ncm-et-10 2019-09-17 03:33 01:16:01 1972203 500 299 10 191 +229.12 +/- 24.45
96339 ncm-et-3 2019-09-17 03:32 01:15:00 1982695 500 282 14 204 +207.95 +/- 23.65
96338 ncm-et-15 2019-09-17 03:31 01:16:37 1979785 500 299 6 195 +233.32 +/- 24.03
96337 ncm-et-13 2019-09-17 02:17 01:15:52 1974202 500 306 12 182 +234.38 +/- 25.17
96336 ncm-et-4 2019-09-17 02:16 01:17:57 1973433 500 293 10 197 +222.92 +/- 24.02
96335 ncm-et-3 2019-09-17 02:16 01:15:42 1967556 500 320 5 175 +257.59 +/- 25.5
96334 ncm-et-9 2019-09-17 02:15 01:16:47 1974359 500 309 7 184 +243.0 +/- 24.87
96333 ncm-et-15 2019-09-17 02:15 01:15:13 1962303 500 299 5 196 +234.38 +/- 23.91
96332 ncm-et-10 2019-09-17 02:15 01:16:44 1961541 500 294 8 198 +226.0 +/- 23.89
96331 ncm-et-13 2019-09-17 00:59 00:17:30 1971128 109 59 5 45 +188.73 +/- 51.17
96330 ncm-et-3 2019-09-17 00:59 00:17:42 1973893 113 68 2 43 +232.3 +/- 52.07
96329 ncm-et-4 2019-09-17 00:58 00:17:46 1976235 117 76 3 38 +254.12 +/- 56.17
96328 ncm-et-10 2019-09-17 00:58 00:17:53 1960478 118 69 4 45 +215.27 +/- 51.23
96327 ncm-et-9 2019-09-17 00:58 00:17:49 1978454 115 68 4 43 +218.11 +/- 52.5
96326 ncm-et-15 2019-09-17 00:58 00:17:36 1965381 117 71 2 44 +235.31 +/- 51.48
96283 ncm-et-15 2019-09-16 15:09 01:16:19 1969727 500 287 8 205 +218.86 +/- 23.41
96282 ncm-et-9 2019-09-16 15:06 01:16:20 1970325 500 317 8 175 +250.77 +/- 25.61
96281 ncm-et-10 2019-09-16 15:05 01:17:29 1962941 500 305 20 175 +224.97 +/- 25.81
96280 ncm-et-13 2019-09-16 15:05 01:16:38 1963840 500 303 16 181 +227.04 +/- 25.32
96279 ncm-et-3 2019-09-16 15:01 01:16:55 1976384 500 292 7 201 +224.97 +/- 23.65
96278 ncm-et-4 2019-09-16 15:00 01:17:10 1970650 500 312 14 174 +238.66 +/- 25.83
96277 ncm-et-15 2019-09-16 13:51 01:17:06 1966926 500 301 8 191 +233.32 +/- 24.39
96276 ncm-et-10 2019-09-16 13:48 01:16:04 1972565 500 298 6 196 +232.26 +/- 23.95
96275 ncm-et-9 2019-09-16 13:48 01:17:22 1960085 500 309 8 183 +241.91 +/- 24.98
96274 ncm-et-13 2019-09-16 13:47 01:16:07 1996058 500 306 9 185 +237.58 +/- 24.86
96273 ncm-et-3 2019-09-16 13:44 01:16:08 1974207 500 306 6 188 +240.82 +/- 24.53
96272 ncm-et-4 2019-09-16 13:43 01:16:38 1981141 500 318 13 169 +246.3 +/- 26.22
96271 ncm-et-15 2019-09-16 12:32 01:17:18 1966800 500 297 12 191 +224.97 +/- 24.5
96270 ncm-et-10 2019-09-16 12:31 01:15:57 1971244 500 304 7 189 +237.58 +/- 24.5
96269 ncm-et-9 2019-09-16 12:30 01:17:21 1975189 500 310 5 185 +246.3 +/- 24.72
96268 ncm-et-13 2019-09-16 12:29 01:17:27 1975607 500 307 7 186 +240.82 +/- 24.72
96267 ncm-et-4 2019-09-16 12:27 01:14:28 1970790 500 300 14 186 +226.0 +/- 24.91
96266 ncm-et-3 2019-09-16 12:26 01:17:11 1973899 500 305 5 190 +240.82 +/- 24.35

Commit

Commit ID 7b064752943b67eaa7ef93f1109acfad50b4ecc2
Author Stéphane Nicolet
Date 2019-09-15 23:37:39 UTC
Scale down endgame factor when shuffling This patch decreases the endgame scale factor using the 50 moves counter. Looking at some games with this patch, it seems to have two effects on the playing style: 1) when no progress can be made in late endgames (for instance in fortresses or opposite bishops endgames) the evaluation will be largely tamed down towards a draw value. 2) more interestingly, there is also a small effect in the midgame play because Stockfish will panic a little bit if there are more than four consecutive shuffling moves with an advantage: the engine will try to move a pawn or to exchange a piece to keep the advantage, so the follow-ups of the position will be discovered earlier by the alpha-beta search. passed STC: LLR: 2.95 (-2.94,2.94) [0.50,4.50] Total: 23017 W: 5080 L: 4805 D: 13132 http://tests.stockfishchess.org/tests/view/5d7e4aef0ebc59069c36fc74 passed LTC: LLR: 2.95 (-2.94,2.94) [0.00,3.50] Total: 30746 W: 5171 L: 4911 D: 20664 http://tests.stockfishchess.org/tests/view/5d7e513d0ebc59069c36ff26 Pull request: https://github.com/official-stockfish/Stockfish/pull/2304 Bench: 4272173
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