Dev Builds » 20191009-0517

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 08:28:05 1973876 3357 2048 50 1259 +238.22 +/- 9.47
ncm-et-4 08:28:13 1975430 3316 1980 67 1269 +228.54 +/- 9.46
ncm-et-9 08:28:06 1970130 3334 2057 53 1224 +241.41 +/- 9.63
ncm-et-10 08:28:15 1963253 3297 1988 50 1259 +234.28 +/- 9.47
ncm-et-13 08:28:05 1972819 3345 2017 54 1274 +233.77 +/- 9.42
ncm-et-15 08:28:02 1967684 3351 2056 59 1236 +238.63 +/- 9.59
20000 12146 333 7521 +235.79 +/- 3.88

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
99232 ncm-et-10 2019-10-10 08:00 00:46:11 1966307 297 189 3 105 +255.45 +/- 33.0
99231 ncm-et-4 2019-10-10 07:58 00:47:26 1999084 316 196 8 112 +238.09 +/- 32.21
99230 ncm-et-9 2019-10-10 07:55 00:50:39 1963700 334 205 7 122 +236.95 +/- 30.74
99229 ncm-et-13 2019-10-10 07:53 00:52:44 1976707 345 209 9 127 +230.01 +/- 30.19
99228 ncm-et-15 2019-10-10 07:53 00:52:52 1958486 351 213 8 130 +232.29 +/- 29.78
99227 ncm-et-3 2019-10-10 07:52 00:53:46 1968471 357 221 2 134 +248.22 +/- 28.94
99226 ncm-et-10 2019-10-10 06:41 01:17:39 1959089 500 321 7 172 +256.44 +/- 25.82
99225 ncm-et-4 2019-10-10 06:40 01:17:18 1983687 500 305 9 186 +236.51 +/- 24.79
99224 ncm-et-9 2019-10-10 06:37 01:17:00 1979520 500 286 11 203 +214.85 +/- 23.64
99223 ncm-et-15 2019-10-10 06:36 01:15:41 1961239 500 316 10 174 +247.41 +/- 25.75
99222 ncm-et-13 2019-10-10 06:36 01:16:15 1976226 500 312 6 182 +247.41 +/- 24.99
99221 ncm-et-3 2019-10-10 06:35 01:15:25 1975291 500 287 9 204 +217.85 +/- 23.51
99220 ncm-et-4 2019-10-10 05:23 01:16:00 1965116 500 276 10 214 +206.01 +/- 22.89
99219 ncm-et-10 2019-10-10 05:23 01:17:02 1966461 500 305 12 183 +233.32 +/- 25.09
99218 ncm-et-9 2019-10-10 05:20 01:15:38 1969421 500 335 9 156 +270.57 +/- 27.29
99217 ncm-et-3 2019-10-10 05:20 01:14:38 1975762 500 315 10 175 +246.3 +/- 25.67
99216 ncm-et-15 2019-10-10 05:19 01:15:31 1978021 500 309 9 182 +240.82 +/- 25.09
99215 ncm-et-13 2019-10-10 05:19 01:16:00 1962765 500 285 6 209 +218.86 +/- 23.07
99214 ncm-et-10 2019-10-10 04:07 01:15:13 1962150 500 301 7 192 +234.38 +/- 24.28
99213 ncm-et-4 2019-10-10 04:04 01:18:04 1959953 500 312 8 180 +245.2 +/- 25.21
99212 ncm-et-15 2019-10-10 04:03 01:14:54 1966927 500 304 4 192 +240.82 +/- 24.16
99211 ncm-et-3 2019-10-10 04:03 01:15:29 1979723 500 303 5 192 +238.66 +/- 24.2
99210 ncm-et-9 2019-10-10 04:02 01:17:13 1962461 500 307 7 186 +240.82 +/- 24.72
99209 ncm-et-13 2019-10-10 04:01 01:16:44 1967696 500 296 9 195 +227.04 +/- 24.13
99208 ncm-et-10 2019-10-10 02:51 01:14:28 1965034 500 306 7 187 +239.74 +/- 24.65
99207 ncm-et-4 2019-10-10 02:47 01:16:06 1972672 500 312 13 175 +239.74 +/- 25.73
99206 ncm-et-15 2019-10-10 02:46 01:16:04 1975204 500 307 10 183 +237.58 +/- 25.04
99205 ncm-et-3 2019-10-10 02:45 01:16:37 1969859 500 308 10 182 +238.66 +/- 25.12
99204 ncm-et-13 2019-10-10 02:45 01:14:24 1992630 500 310 5 185 +246.3 +/- 24.72
99203 ncm-et-9 2019-10-10 02:44 01:16:40 1967083 500 317 7 176 +251.89 +/- 25.5
99202 ncm-et-10 2019-10-10 01:30 01:19:38 1958334 500 285 5 210 +219.87 +/- 22.96
99201 ncm-et-15 2019-10-10 01:29 01:16:34 1955887 500 305 10 185 +235.45 +/- 24.89
99200 ncm-et-4 2019-10-10 01:29 01:16:51 1973135 500 298 7 195 +231.21 +/- 24.06
99199 ncm-et-9 2019-10-10 01:28 01:14:58 1973584 500 299 5 196 +234.38 +/- 23.91
99198 ncm-et-3 2019-10-10 01:28 01:16:20 1978320 500 295 9 196 +226.0 +/- 24.06
99197 ncm-et-13 2019-10-10 01:28 01:16:19 1969715 500 297 9 194 +228.08 +/- 24.2
99196 ncm-et-9 2019-10-10 00:11 01:15:58 1975142 500 308 7 185 +241.91 +/- 24.8
99195 ncm-et-13 2019-10-10 00:11 01:15:39 1963994 500 308 10 182 +238.66 +/- 25.12
99194 ncm-et-15 2019-10-10 00:11 01:16:26 1978028 500 302 8 190 +234.38 +/- 24.46
99193 ncm-et-10 2019-10-10 00:11 01:18:04 1965402 500 281 9 210 +211.87 +/- 23.12
99192 ncm-et-3 2019-10-10 00:11 01:15:50 1969710 500 319 5 176 +256.44 +/- 25.42
99191 ncm-et-4 2019-10-10 00:11 01:16:28 1974363 500 281 12 207 +208.93 +/- 23.41

Commit

Commit ID 23a022980baadd5315d59a1480d26925a427aeb9
Author 31m059
Date 2019-10-09 05:17:52 UTC
No reachable outpost bonus for bishops Previously, we used various control statements and ternary operators to divide Outpost into four bonuses, based on whether the outpost was for a knight or bishop, and whether it was currently an Outpost or merely a potential ("reachable") one in the future. Bishop outposts, however, have traditionally been worth far less Elo in testing. An attempt to remove them altogether passed STC, but failed LTC. Here we include a narrower simplification, removing the reachable Outpost bonus for bishops. This bonus was always suspect, given that its current implementation conflicts directly with BishopPawns. BishopPawns penalizes our bishops based on the number of friendly pawns on the same color of square, but by definition, Outposts must be pawn-protected! This PR helps to alleviate this conceptual contradiction without loss of Elo and with slightly simpler code. On a code level, this allows us to simplify a ternary operator into the previous "if" block and distribute a multiplication into an existing constant Score. On a conceptual level, we retire one of the four traditional Outpost bonuses. STC: LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 22277 W: 4882 L: 4762 D: 12633 http://tests.stockfishchess.org/tests/view/5d9aeed60ebc5902b6cf9751 LTC: LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 51206 W: 8353 L: 8280 D: 34573 http://tests.stockfishchess.org/tests/view/5d9af1940ebc5902b6cf9cd5 Closes https://github.com/official-stockfish/Stockfish/pull/2352 Bench: 3941591
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