Dev Builds » 20190509-1339

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 08:34:17 1972291 3337 1990 71 1276 +227.59 +/- 9.44
ncm-et-4 08:33:35 1970191 3340 1964 76 1300 +222.55 +/- 9.35
ncm-et-9 08:37:27 1970206 3324 1930 89 1305 +216.77 +/- 9.35
ncm-et-10 08:35:18 1962123 3307 1940 65 1302 +223.42 +/- 9.32
ncm-et-13 08:33:53 1979714 3353 1972 79 1302 +222.19 +/- 9.35
ncm-et-15 08:34:32 1969921 3339 1910 89 1340 +212.55 +/- 9.21
20000 11706 469 7825 +220.81 +/- 3.81

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
80948 ncm-et-10 2019-05-10 10:17 00:46:53 1965851 307 169 7 131 +203.92 +/- 29.37
80947 ncm-et-9 2019-05-10 10:14 00:49:35 1965552 324 191 6 127 +225.48 +/- 29.95
80946 ncm-et-3 2019-05-10 10:12 00:51:40 1974591 337 205 5 127 +237.3 +/- 29.96
80945 ncm-et-4 2019-05-10 10:11 00:52:41 1977136 340 205 10 125 +226.79 +/- 30.47
80944 ncm-et-15 2019-05-10 10:10 00:53:30 1967393 339 186 9 144 +201.25 +/- 28.08
80943 ncm-et-13 2019-05-10 10:09 00:54:02 1997330 353 208 7 138 +224.67 +/- 28.75
80942 ncm-et-9 2019-05-10 08:56 01:17:03 1972059 500 273 18 209 +195.51 +/- 23.42
80941 ncm-et-10 2019-05-10 08:55 01:19:59 1957094 500 298 11 191 +227.04 +/- 24.48
80940 ncm-et-3 2019-05-10 08:54 01:17:02 1988557 500 308 15 177 +233.32 +/- 25.61
80939 ncm-et-15 2019-05-10 08:53 01:15:20 1977785 500 291 17 192 +213.85 +/- 24.53
80938 ncm-et-4 2019-05-10 08:53 01:16:42 1964302 500 280 10 210 +209.91 +/- 23.15
80937 ncm-et-13 2019-05-10 08:50 01:18:20 1970014 500 300 8 192 +232.26 +/- 24.31
80936 ncm-et-9 2019-05-10 07:38 01:16:53 1972821 500 313 9 178 +245.2 +/- 25.4
80935 ncm-et-10 2019-05-10 07:36 01:18:02 1956027 500 304 5 191 +239.74 +/- 24.27
80934 ncm-et-3 2019-05-10 07:36 01:16:39 1977254 500 295 13 192 +221.9 +/- 24.45
80933 ncm-et-15 2019-05-10 07:35 01:17:08 1968004 500 281 16 203 +205.04 +/- 23.76
80932 ncm-et-4 2019-05-10 07:35 01:16:54 1970188 500 317 7 176 +251.89 +/- 25.5
80931 ncm-et-13 2019-05-10 07:33 01:15:48 1977941 500 282 12 206 +209.91 +/- 23.47
80930 ncm-et-3 2019-05-10 06:19 01:16:08 1973188 500 290 11 199 +218.86 +/- 23.91
80929 ncm-et-4 2019-05-10 06:18 01:16:15 1963079 500 282 13 205 +208.93 +/- 23.56
80928 ncm-et-10 2019-05-10 06:17 01:17:50 1962312 500 300 9 191 +231.21 +/- 24.42
80927 ncm-et-15 2019-05-10 06:17 01:17:12 1961534 500 304 7 189 +237.58 +/- 24.5
80926 ncm-et-9 2019-05-10 06:17 01:19:53 1956776 500 293 15 192 +217.85 +/- 24.5
80925 ncm-et-13 2019-05-10 06:16 01:15:25 1975603 500 300 11 189 +229.12 +/- 24.62
80924 ncm-et-3 2019-05-10 04:59 01:18:24 1962149 500 277 9 214 +207.95 +/- 22.86
80923 ncm-et-13 2019-05-10 04:59 01:16:19 1982758 500 297 14 189 +222.92 +/- 24.69
80922 ncm-et-15 2019-05-10 04:59 01:17:12 1975137 500 277 9 214 +207.95 +/- 22.86
80921 ncm-et-10 2019-05-10 04:59 01:17:37 1964011 500 298 12 190 +226.0 +/- 24.57
80920 ncm-et-4 2019-05-10 04:59 01:17:59 1975075 500 286 12 202 +213.85 +/- 23.74
80919 ncm-et-9 2019-05-10 04:59 01:17:11 1969088 500 279 10 211 +208.93 +/- 23.09
80876 ncm-et-3 2019-05-09 19:01 01:17:18 1965690 500 314 9 177 +246.3 +/- 25.48
80875 ncm-et-13 2019-05-09 19:01 01:17:05 1986972 500 287 16 197 +210.89 +/- 24.17
80874 ncm-et-9 2019-05-09 18:59 01:19:09 1966329 500 288 14 198 +213.85 +/- 24.06
80873 ncm-et-15 2019-05-09 18:59 01:17:23 1965396 500 290 15 195 +214.85 +/- 24.29
80872 ncm-et-4 2019-05-09 18:58 01:17:10 1970086 500 293 14 193 +218.86 +/- 24.41
80871 ncm-et-10 2019-05-09 18:57 01:17:31 1972169 500 286 7 207 +218.86 +/- 23.24
80870 ncm-et-13 2019-05-09 17:43 01:16:54 1967385 500 298 11 191 +227.04 +/- 24.48
80869 ncm-et-3 2019-05-09 17:43 01:17:06 1964610 500 301 9 190 +232.26 +/- 24.49
80868 ncm-et-4 2019-05-09 17:41 01:15:54 1971476 500 301 10 189 +231.21 +/- 24.59
80867 ncm-et-15 2019-05-09 17:41 01:16:47 1974204 500 281 16 203 +205.04 +/- 23.76
80866 ncm-et-9 2019-05-09 17:40 01:17:43 1988820 500 293 17 190 +215.85 +/- 24.67
80865 ncm-et-10 2019-05-09 17:39 01:17:26 1957399 500 285 14 201 +210.89 +/- 23.85

Commit

Commit ID ad8b78ad5281138cfe188dedcf76ec8ef622531f
Author Sergei Ivanov
Date 2019-05-09 13:39:57 UTC
Fix cycle detection in presence of repetitions In master search() may incorrectly return a draw score in the following corner case: there was a 2-fold repetition during the game, and the current position can be reached by a move from a repeated one. This case is treated as an upcoming 3-fold repetition, which it is not. Here is a testcase demonstrating the issue (note that the moves after FEN are required). The input: position fen 8/8/8/8/8/8/p7/2k4K b - - 0 1 moves c1b1 h1g1 b1c1 g1h1 c1b1 h1g1 b1a1 g1h1 go movetime 1000 produces the output: [...] info depth 127 seldepth 2 multipv 1 score cp 0 [...] bestmove a1b1 saying that the game will be drawn by repetion. However the other possible move for black, Kb2, avoids repetitions and wins. The patch fixes this behavior. In particular it finds mate in 10 in the above position. STC: LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 10604 W: 2390 L: 2247 D: 5967 http://tests.stockfishchess.org/tests/view/5cb373e00ebc5925cf0167bf LTC: LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 19620 W: 3308 L: 3185 D: 13127 http://tests.stockfishchess.org/tests/view/5cb3822f0ebc5925cf016b2d Bench is not changed since it does not test positions with history of moves. Bench: 3184182
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