Dev Builds » 20180418-1646

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 06:01:26 2002658 2390 1150 66 1174 +169.95 +/- 9.66
ncm-et-4 05:59:12 1997666 2395 1140 65 1190 +167.9 +/- 9.57
ncm-et-5 01:46:32 2004057 713 342 34 337 +160.63 +/- 18.33
ncm-et-6 01:48:26 2024917 717 355 17 345 +177.85 +/- 17.83
ncm-et-7 01:47:39 2022011 716 366 15 335 +186.35 +/- 18.12
ncm-et-8 01:46:03 2021814 715 342 25 348 +165.52 +/- 17.86
ncm-et-9 06:00:35 2000556 2393 1096 66 1231 +159.96 +/- 9.37
ncm-et-10 06:00:15 1988268 2358 1105 68 1185 +163.97 +/- 9.59
ncm-et-11 01:47:12 2016611 719 327 24 368 +156.14 +/- 17.23
ncm-et-12 01:48:27 2018315 712 347 19 346 +173.08 +/- 17.82
ncm-et-13 05:59:33 1995643 2373 1098 65 1210 +162.06 +/- 9.46
ncm-et-14 01:47:40 2020347 714 343 22 349 +168.22 +/- 17.78
ncm-et-15 06:01:39 1981558 2371 1074 53 1244 +160.05 +/- 9.25
ncm-et-16 01:46:08 2017436 714 312 22 380 +149.75 +/- 16.81
20000 9397 561 10042 +164.85 +/- 3.29

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
51276 ncm-et-10 2018-08-26 06:21 00:21:45 1984990 140 73 6 61 +181.06 +/- 43.61
51275 ncm-et-13 2018-08-26 06:18 00:24:22 1963324 162 79 3 80 +176.83 +/- 36.92
51274 ncm-et-15 2018-08-26 06:18 00:24:40 1949441 160 72 4 84 +157.66 +/- 35.84
51273 ncm-et-9 2018-08-26 06:16 00:26:50 1988298 181 81 4 96 +157.83 +/- 33.36
51272 ncm-et-4 2018-08-26 06:15 00:27:13 1989559 176 77 4 95 +153.34 +/- 33.44
51271 ncm-et-3 2018-08-26 06:14 00:28:28 1990664 181 93 5 83 +184.51 +/- 36.84
51270 ncm-et-10 2018-08-26 05:01 01:18:30 1943303 500 236 13 251 +166.66 +/- 20.83
51269 ncm-et-13 2018-08-26 05:01 01:16:03 1987522 500 211 13 276 +145.54 +/- 19.52
51268 ncm-et-15 2018-08-26 05:01 01:16:14 1980285 500 221 13 266 +153.86 +/- 20.03
51267 ncm-et-4 2018-08-26 05:00 01:13:59 1991930 500 234 11 255 +166.66 +/- 20.55
51266 ncm-et-9 2018-08-26 04:59 01:16:22 1986563 500 228 12 260 +160.64 +/- 20.32
51265 ncm-et-3 2018-08-26 04:58 01:15:43 1991456 500 229 9 262 +164.07 +/- 20.1
51264 ncm-et-10 2018-08-26 03:45 01:15:40 1980913 500 226 12 262 +158.93 +/- 20.21
51263 ncm-et-13 2018-08-26 03:44 01:15:38 1990034 500 236 18 246 +162.35 +/- 21.24
51262 ncm-et-4 2018-08-26 03:43 01:15:50 1988611 500 222 12 266 +155.54 +/- 20.0
51261 ncm-et-9 2018-08-26 03:43 01:14:34 1988296 500 227 15 258 +157.24 +/- 20.52
51260 ncm-et-3 2018-08-26 03:43 01:13:43 1987981 500 247 16 237 +173.67 +/- 21.69
51259 ncm-et-15 2018-08-26 03:42 01:17:29 1943165 500 233 10 257 +166.66 +/- 20.41
51258 ncm-et-4 2018-08-26 02:27 01:15:37 1990664 500 238 20 242 +162.35 +/- 21.51
51257 ncm-et-10 2018-08-26 02:27 01:16:55 1978888 500 243 12 245 +173.67 +/- 21.13
51256 ncm-et-3 2018-08-26 02:26 01:15:14 1992405 500 229 11 260 +162.35 +/- 20.28
51255 ncm-et-9 2018-08-26 02:26 01:15:20 1990506 500 230 7 263 +166.66 +/- 19.97
51254 ncm-et-15 2018-08-26 02:26 01:14:40 1979347 500 223 8 269 +159.78 +/- 19.7
51253 ncm-et-13 2018-08-26 02:26 01:16:54 1986251 500 254 11 235 +184.42 +/- 21.66
20486 ncm-et-12 2018-04-18 22:11 00:32:14 2019209 212 93 3 116 +157.46 +/- 29.9
20485 ncm-et-16 2018-04-18 22:11 00:32:13 2019533 214 92 5 117 +149.91 +/- 30.04
20484 ncm-et-10 2018-04-18 22:11 00:32:11 2019700 218 108 13 97 +162.26 +/- 34.58
20483 ncm-et-6 2018-04-18 22:11 00:32:17 2025572 217 113 8 96 +183.46 +/- 34.52
20482 ncm-et-15 2018-04-18 22:11 00:32:20 2018395 211 101 3 107 +174.75 +/- 31.61
20481 ncm-et-7 2018-04-18 22:11 00:32:14 2018777 216 112 3 101 +193.0 +/- 32.94
20480 ncm-et-4 2018-04-18 22:11 00:32:11 1999828 219 110 6 103 +179.4 +/- 32.93
20479 ncm-et-13 2018-04-18 22:11 00:32:11 2024754 211 93 8 110 +148.37 +/- 31.61
20478 ncm-et-9 2018-04-18 22:11 00:32:22 2023610 212 94 12 106 +141.76 +/- 32.69
20477 ncm-et-8 2018-04-18 22:11 00:32:21 2022467 215 105 8 102 +168.91 +/- 33.25
20476 ncm-et-5 2018-04-18 22:11 00:32:27 1983525 213 99 11 103 +152.66 +/- 33.23
20475 ncm-et-14 2018-04-18 22:11 00:32:24 2019859 214 102 3 109 +173.94 +/- 31.29
20474 ncm-et-3 2018-04-18 22:11 00:32:24 2027707 209 94 8 107 +151.97 +/- 32.15
20473 ncm-et-11 2018-04-18 22:11 00:32:25 2015476 219 92 11 116 +134.9 +/- 30.9
20416 ncm-et-12 2018-04-18 17:17 01:16:13 2017421 500 254 16 230 +179.9 +/- 22.09
20415 ncm-et-11 2018-04-18 17:16 01:14:47 2017746 500 235 13 252 +165.8 +/- 20.78
20414 ncm-et-5 2018-04-18 17:16 01:14:05 2024590 500 243 23 234 +164.07 +/- 22.02
20413 ncm-et-16 2018-04-18 17:16 01:13:55 2015340 500 220 17 263 +149.68 +/- 20.31
20412 ncm-et-10 2018-04-18 17:15 01:15:14 2021814 500 219 12 269 +153.02 +/- 19.85
20411 ncm-et-3 2018-04-18 17:15 01:15:54 2025735 500 258 17 225 +182.61 +/- 22.41
20410 ncm-et-15 2018-04-18 17:15 01:16:16 2018720 500 224 15 261 +154.7 +/- 20.36
20409 ncm-et-9 2018-04-18 17:15 01:15:07 2026063 500 236 16 248 +164.07 +/- 21.08
20408 ncm-et-7 2018-04-18 17:14 01:15:25 2025245 500 254 12 234 +183.51 +/- 21.75
20407 ncm-et-8 2018-04-18 17:14 01:13:42 2021162 500 237 17 246 +164.07 +/- 21.22
20406 ncm-et-4 2018-04-18 17:14 01:14:22 2025408 500 259 12 229 +188.08 +/- 22.04
20405 ncm-et-6 2018-04-18 17:14 01:16:09 2024263 500 242 9 249 +175.44 +/- 20.8
20404 ncm-et-14 2018-04-18 17:14 01:15:16 2020836 500 241 19 240 +165.8 +/- 21.6
20403 ncm-et-13 2018-04-18 17:13 01:14:25 2021978 500 225 12 263 +158.08 +/- 20.16

Commit

Commit ID 108f0da4d7f993732aa2e854b8f3fa8ca6d3b46c
Author syzygy1
Date 2018-04-18 16:46:24 UTC
Tablebases root ranking This patch corrects both MultiPV behaviour and "go searchmoves" behaviour for tablebases. We change the logic of table base probing at root positions from filtering to ranking. The ranking code is much more straightforward than the current filtering code (this is a simplification), and also more versatile. If the root is a TB position, each root move is probed and assigned a TB score and a TB rank. The TB score is the Value to be displayed to the user for that move (unless the search finds a mate score), while the TB rank determines which moves should appear higher in a multi-pv search. In game play, the engine will always pick a move with the highest rank. Ranks run from -1000 to +1000: 901 to 1000 : TB win 900 : normally a TB win, in rare cases this could be a draw 1 to 899 : cursed TB wins 0 : draw -1 to -899 : blessed TB losses -900 : normally a TB loss, in rare cases this could be a draw -901 to -1000 : TB loss Normally all winning moves get rank 1000 (to let the search pick the best among them). The exception is if there has been a first repetition. In that case, moves are ranked strictly by DTZ so that the engine will play a move that lowers DTZ (and therefore cannot repeat the position a second time). Losing moves get rank -1000 unless they have relatively high DTZ, meaning they have some drawing chances. Those get ranks towards -901 (when they cross -900 the draw is certain). Closes https://github.com/official-stockfish/Stockfish/pull/1467 No functional change (without tablebases).
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