Dev Builds » 20130902-0903

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 05:30:52 1991944 2377 89 1320 968 -199.23 +/- 10.88
ncm-et-4 05:30:32 1979037 2369 89 1351 929 -206.35 +/- 11.13
ncm-et-5 01:38:02 2023364 710 22 369 319 -185.67 +/- 18.78
ncm-et-6 01:38:32 2025326 707 28 376 303 -187.26 +/- 19.43
ncm-et-7 01:38:17 1979774 721 24 424 273 -217.24 +/- 20.56
ncm-et-8 01:38:17 1989305 708 29 399 280 -201.48 +/- 20.31
ncm-et-9 05:30:42 1986779 2384 107 1379 898 -206.76 +/- 11.35
ncm-et-10 05:30:31 1986247 2393 92 1377 924 -208.43 +/- 11.17
ncm-et-11 01:38:18 2019533 721 20 411 290 -211.04 +/- 19.84
ncm-et-12 01:38:29 2020266 702 31 402 269 -204.31 +/- 20.76
ncm-et-13 05:30:34 1990234 2396 80 1341 975 -203.25 +/- 10.82
ncm-et-14 01:38:13 2019533 723 18 406 299 -208.27 +/- 19.47
ncm-et-15 05:30:54 1987279 2378 88 1318 972 -198.93 +/- 10.85
ncm-et-16 01:38:14 2019862 711 24 394 293 -200.43 +/- 19.76
20000 741 11267 7992 -203.25 +/- 3.79

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
102610 ncm-et-9 2019-11-04 23:12 00:22:02 1978012 153 4 100 49 -256.13 +/- 49.27
102609 ncm-et-3 2019-11-04 23:12 00:22:25 1971877 163 6 98 59 -222.11 +/- 44.72
102608 ncm-et-15 2019-11-04 23:12 00:22:44 1970478 163 9 86 68 -178.29 +/- 41.5
102607 ncm-et-4 2019-11-04 23:11 00:22:57 1974442 161 5 93 63 -213.15 +/- 43.02
102606 ncm-et-10 2019-11-04 23:10 00:24:22 1974563 176 10 96 70 -185.62 +/- 40.98
102605 ncm-et-13 2019-11-04 23:09 00:25:36 1976849 184 6 108 70 -217.02 +/- 40.86
102604 ncm-et-15 2019-11-04 22:02 01:08:54 1973741 500 13 263 224 -190.85 +/- 22.37
102603 ncm-et-3 2019-11-04 22:01 01:09:58 1978670 500 24 272 204 -189.0 +/- 23.82
102602 ncm-et-4 2019-11-04 22:01 01:09:17 1970641 500 19 284 197 -205.04 +/- 24.22
102601 ncm-et-13 2019-11-04 22:00 01:07:13 1968163 500 18 293 189 -214.85 +/- 24.76
102600 ncm-et-9 2019-11-04 22:00 01:11:38 1955552 500 23 289 188 -206.01 +/- 24.88
102599 ncm-et-10 2019-11-04 22:00 01:09:21 1962959 500 24 278 198 -194.57 +/- 24.21
102598 ncm-et-15 2019-11-04 20:51 01:09:20 1977007 500 21 274 205 -193.64 +/- 23.72
102597 ncm-et-4 2019-11-04 20:51 01:08:50 1969251 500 20 281 199 -201.19 +/- 24.1
102596 ncm-et-9 2019-11-04 20:50 01:09:09 1968472 500 24 286 190 -202.15 +/- 24.75
102595 ncm-et-13 2019-11-04 20:49 01:10:15 1970641 500 13 281 206 -207.95 +/- 23.5
102594 ncm-et-10 2019-11-04 20:49 01:09:57 1965072 500 21 290 189 -208.93 +/- 24.79
102593 ncm-et-3 2019-11-04 20:49 01:11:26 1972806 500 12 265 223 -193.64 +/- 22.4
102592 ncm-et-9 2019-11-04 19:39 01:09:30 1965535 500 20 269 211 -189.92 +/- 23.32
102591 ncm-et-15 2019-11-04 19:39 01:11:26 1963383 500 20 290 190 -209.91 +/- 24.71
102590 ncm-et-4 2019-11-04 19:39 01:11:09 1968643 500 15 289 196 -213.85 +/- 24.22
102589 ncm-et-10 2019-11-04 19:39 01:08:42 1975175 500 13 297 190 -223.94 +/- 24.6
102588 ncm-et-3 2019-11-04 19:39 01:08:42 1974053 500 22 273 205 -191.78 +/- 23.73
102587 ncm-et-13 2019-11-04 19:39 01:09:21 1972972 500 18 280 202 -202.15 +/- 23.87
31506 ncm-et-12 2018-05-18 21:26 00:27:59 2019370 202 10 127 65 -229.75 +/- 42.64
31505 ncm-et-13 2018-05-18 21:25 00:28:39 2026885 212 2 110 100 -195.25 +/- 32.92
31504 ncm-et-6 2018-05-18 21:25 00:28:52 2025736 207 5 114 88 -203.38 +/- 35.96
31503 ncm-et-8 2018-05-18 21:25 00:29:03 2008335 208 7 115 86 -199.87 +/- 36.64
31502 ncm-et-10 2018-05-18 21:25 00:29:04 2019858 217 9 121 87 -198.4 +/- 36.59
31501 ncm-et-14 2018-05-18 21:24 00:29:26 2020184 223 9 123 91 -196.08 +/- 35.72
31500 ncm-et-3 2018-05-18 21:24 00:29:30 2025899 214 6 128 80 -225.02 +/- 38.15
31499 ncm-et-4 2018-05-18 21:24 00:29:26 2024920 208 9 119 80 -204.48 +/- 38.26
31498 ncm-et-5 2018-05-18 21:24 00:29:32 2022956 210 10 112 88 -184.29 +/- 36.35
31497 ncm-et-11 2018-05-18 21:24 00:29:47 2019696 221 4 124 93 -211.37 +/- 34.86
31496 ncm-et-16 2018-05-18 21:24 00:29:38 2018399 211 7 107 97 -178.97 +/- 34.15
31495 ncm-et-15 2018-05-18 21:24 00:29:59 2020021 215 8 123 84 -207.41 +/- 37.25
31494 ncm-et-7 2018-05-18 21:23 00:30:51 1961091 221 7 140 74 -241.81 +/- 39.89
31493 ncm-et-9 2018-05-18 21:22 00:31:21 2026390 231 8 148 75 -244.13 +/- 39.66
31492 ncm-et-13 2018-05-18 20:15 01:09:30 2025899 500 23 269 208 -187.16 +/- 23.56
31491 ncm-et-14 2018-05-18 20:15 01:08:47 2018883 500 9 283 208 -213.85 +/- 23.25
31490 ncm-et-5 2018-05-18 20:14 01:08:30 2023772 500 12 257 231 -186.25 +/- 21.92
31489 ncm-et-3 2018-05-18 20:14 01:08:51 2028359 500 19 284 197 -205.04 +/- 24.22
31488 ncm-et-10 2018-05-18 20:14 01:09:05 2019859 500 15 295 190 -219.87 +/- 24.64
31487 ncm-et-11 2018-05-18 20:14 01:08:31 2019370 500 16 287 197 -210.89 +/- 24.17
31486 ncm-et-7 2018-05-18 20:14 01:07:26 1998458 500 17 284 199 -206.98 +/- 24.05
31485 ncm-et-12 2018-05-18 20:14 01:10:30 2021162 500 21 275 204 -194.57 +/- 23.79
31484 ncm-et-9 2018-05-18 20:14 01:07:02 2026718 500 28 287 185 -199.29 +/- 25.11
31483 ncm-et-4 2018-05-18 20:14 01:08:53 1966325 500 21 285 194 -204.07 +/- 24.45
31482 ncm-et-6 2018-05-18 20:14 01:09:40 2024917 500 23 262 215 -180.8 +/- 23.12
31481 ncm-et-8 2018-05-18 20:14 01:09:14 1970276 500 22 284 194 -202.15 +/- 24.46
31480 ncm-et-16 2018-05-18 20:14 01:08:36 2021325 500 17 287 196 -209.91 +/- 24.25
31479 ncm-et-15 2018-05-18 20:14 01:08:31 2019045 500 17 282 201 -205.04 +/- 23.92

Commit

Commit ID 9ff594c3a9e3517eb12f0abfced6baa2ac58e4c1
Author Marco Costalba
Date 2013-09-02 09:03:01 UTC
Rewrite KBBKN endgame This was thought to be a draw but the bishops generally win. However, it takes up to 66 moves. The position in the diagram was thought to be a draw for over one hundred years, but tablebases show that White wins in 45 moves. All of the long wins go through this type of semi-fortress position. It takes several moves to force Black out of the temporary fortress in the corner; then precise play with the bishops prevents Black from forming the temporary fortress in another corner (Nunn 1995:265ff). Before computer analysis, Speelman listed this position as unresolved, but "probably a draw" (Speelman 1981:109). bench: 3453945
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