Dev Builds » 20180817-0940

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 08:38:11 1989696 3372 1769 102 1501 +188.25 +/- 8.65
ncm-et-4 08:35:06 1989356 3329 1646 96 1587 +175.26 +/- 8.35
ncm-et-9 08:36:50 1988524 3385 1726 77 1582 +184.95 +/- 8.34
ncm-et-10 08:33:51 1967011 3298 1671 106 1521 +179.24 +/- 8.57
ncm-et-13 08:36:13 1959434 3305 1706 82 1517 +186.88 +/- 8.55
ncm-et-15 08:33:28 1965644 3311 1724 80 1507 +189.24 +/- 8.58
20000 10242 543 9215 +183.94 +/- 3.47

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
50178 ncm-et-10 2018-08-17 21:01 00:45:58 1982478 298 153 12 133 +178.63 +/- 29.3
50177 ncm-et-13 2018-08-17 21:00 00:46:57 1987509 305 163 5 137 +199.31 +/- 28.44
50176 ncm-et-15 2018-08-17 20:59 00:48:26 1980756 311 152 7 152 +175.54 +/- 26.83
50175 ncm-et-4 2018-08-17 20:57 00:50:51 1988770 329 155 16 158 +156.6 +/- 26.78
50174 ncm-et-3 2018-08-17 20:50 00:56:50 1988927 372 196 5 171 +197.13 +/- 25.3
50173 ncm-et-9 2018-08-17 20:47 01:00:10 1985619 385 182 8 195 +169.25 +/- 23.51
50172 ncm-et-13 2018-08-17 19:43 01:16:12 1988141 500 243 16 241 +170.15 +/- 21.47
50171 ncm-et-10 2018-08-17 19:42 01:18:02 1981851 500 266 24 210 +183.51 +/- 23.45
50170 ncm-et-15 2018-08-17 19:41 01:16:50 1981229 500 275 9 216 +206.01 +/- 22.73
50169 ncm-et-4 2018-08-17 19:38 01:17:21 1989559 500 250 11 239 +180.8 +/- 21.43
50168 ncm-et-3 2018-08-17 19:33 01:16:22 1986253 500 264 19 217 +186.25 +/- 22.94
50167 ncm-et-9 2018-08-17 19:31 01:15:37 1988770 500 257 10 233 +188.08 +/- 21.74
50166 ncm-et-10 2018-08-17 18:24 01:16:40 1981694 500 238 17 245 +164.93 +/- 21.27
50165 ncm-et-13 2018-08-17 18:23 01:19:16 1929911 500 274 11 215 +203.11 +/- 22.86
50164 ncm-et-15 2018-08-17 18:22 01:18:00 1983106 500 260 18 222 +183.51 +/- 22.61
50163 ncm-et-4 2018-08-17 18:19 01:17:35 1990033 500 253 17 230 +178.11 +/- 22.12
50162 ncm-et-3 2018-08-17 18:15 01:16:35 1990665 500 264 13 223 +191.78 +/- 22.43
50161 ncm-et-9 2018-08-17 18:13 01:16:07 1990349 500 272 9 219 +203.11 +/- 22.55
50160 ncm-et-10 2018-08-17 17:06 01:17:08 1956501 500 238 12 250 +169.27 +/- 20.85
50159 ncm-et-13 2018-08-17 17:06 01:16:08 1988454 500 266 14 220 +192.71 +/- 22.64
50158 ncm-et-4 2018-08-17 17:02 01:16:15 1989559 500 238 21 241 +161.49 +/- 21.59
50157 ncm-et-15 2018-08-17 17:02 01:18:57 1907071 500 256 6 238 +190.85 +/- 21.3
50156 ncm-et-3 2018-08-17 16:57 01:16:54 1992088 500 280 20 200 +200.24 +/- 24.03
50155 ncm-et-9 2018-08-17 16:56 01:15:58 1987351 500 277 12 211 +205.04 +/- 23.15
50154 ncm-et-15 2018-08-17 15:45 01:15:37 1984047 500 253 16 231 +179.0 +/- 22.04
50153 ncm-et-10 2018-08-17 15:45 01:19:51 1941004 500 255 18 227 +179.0 +/- 22.32
50152 ncm-et-4 2018-08-17 15:44 01:16:57 1989718 500 246 12 242 +176.33 +/- 21.29
50151 ncm-et-13 2018-08-17 15:44 01:20:25 1887309 500 262 10 228 +192.71 +/- 22.04
50150 ncm-et-3 2018-08-17 15:39 01:17:08 1990664 500 266 17 217 +189.92 +/- 22.89
50149 ncm-et-9 2018-08-17 15:38 01:17:07 1987037 500 246 13 241 +175.44 +/- 21.38
50148 ncm-et-15 2018-08-17 14:27 01:17:07 1982007 500 266 10 224 +196.45 +/- 22.28
50147 ncm-et-10 2018-08-17 14:26 01:18:37 1943390 500 265 12 223 +193.64 +/- 22.4
50146 ncm-et-4 2018-08-17 14:25 01:18:16 1988298 500 264 7 229 +197.4 +/- 21.87
50145 ncm-et-13 2018-08-17 14:23 01:19:46 1949401 500 265 11 224 +194.57 +/- 22.31
50144 ncm-et-9 2018-08-17 14:22 01:15:31 1990665 500 239 14 247 +168.4 +/- 21.08
50143 ncm-et-3 2018-08-17 14:21 01:17:09 1990349 500 251 16 233 +177.22 +/- 21.92
50142 ncm-et-15 2018-08-17 13:07 01:18:31 1941295 500 262 14 224 +189.0 +/- 22.4
50141 ncm-et-10 2018-08-17 13:07 01:17:35 1982164 500 256 11 233 +186.25 +/- 21.78
50140 ncm-et-4 2018-08-17 13:06 01:17:51 1989559 500 240 12 248 +171.02 +/- 20.96
50139 ncm-et-13 2018-08-17 13:05 01:17:29 1985317 500 233 15 252 +162.35 +/- 20.84
50138 ncm-et-9 2018-08-17 13:04 01:16:20 1989879 500 253 11 236 +183.51 +/- 21.6
50137 ncm-et-3 2018-08-17 13:03 01:17:13 1988928 500 248 12 240 +178.11 +/- 21.41

Commit

Commit ID 96c3a1f2eca1dfb96fdddc03630e6d984c358a2b
Author VoyagerOne
Date 2018-08-17 09:40:29 UTC
Mix search stats with evaluation Mix search stats with evaluation: if the opponent's move has a good historyStat, then decrease the evaluation of the internal node a bit for the pruning decisions during search. STC; LLR: 2.96 (-2.94,2.94) [0.00,5.00] Total: 72083 W: 15683 L: 15203 D: 41197 http://tests.stockfishchess.org/tests/view/5b74c3ea0ebc5902bdba7d41 LTC: LLR: 2.95 (-2.94,2.94) [0.00,5.00] Total: 29104 W: 4867 L: 4630 D: 19607 http://tests.stockfishchess.org/tests/view/5b7565000ebc5902bdba851b Closes https://github.com/official-stockfish/Stockfish/pull/1738 Bench: 4514101 ----------- How to continue from there? • the use of the previous stat score can probably be simplified in lines 587 and 716 • we could try to use a continuous bonus based on the previous stat score, instead of just a fixed offset of -10 when the opponent previous move was good. ---------- Comments by Stefan Geschwentner: Interesting idea. Because only the eval in search is tweak this should only influence the eval and static eval used at inner nodes, and not on the return search value (which comes in the end from quiescence search), except through saving in TT followed by a TT cutoff. So essentialy this effects diverse pruning/reduction parts -- eval and static eval are lowered for good opponent moves: • tt cutoff (ttValue) • improving (static eval) • more razoring (eval) • less futility pruning (eval) • less null move pruning (eval + static eval) (but with little more depth) • more probcut (static eval) • more move futility pruning (static eval)
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