Dev Builds » 20220328-2037

Use this dev build

NCM plays each Stockfish dev build 20,000 times against Stockfish 14. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.

Summary

Host Duration Avg Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo
ncm-dbt-01 10:02:24 1220939 3336 1225 451 1660 +82.11 +/- 5.75 1 114 694 828 31 +166.68 +/- 12.92
ncm-dbt-02 10:04:21 1236010 3338 1267 450 1621 +86.8 +/- 5.61 1 94 690 855 29 +178.44 +/- 12.94
ncm-dbt-03 10:01:15 1265456 3324 1234 439 1651 +84.74 +/- 5.66 0 108 675 855 24 +174.51 +/- 13.11
ncm-dbt-04 10:01:31 1255428 3332 1253 421 1658 +88.63 +/- 5.66 0 98 669 868 31 +182.06 +/- 13.16
ncm-dbt-05 10:01:32 1257479 3334 1229 417 1688 +86.35 +/- 5.71 2 102 674 860 29 +177.62 +/- 13.12
ncm-dbt-06 10:06:13 1270122 3336 1236 440 1660 +84.53 +/- 5.75 2 107 684 843 32 +172.45 +/- 13.02
20000 7444 2618 9938 +85.52 +/- 2.32 6 623 4086 5109 176 +175.26 +/- 5.32

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
204858 ncm-dbt-03 1222013 162 57 21 84 +78.51 +/- 25.84 0 6 34 40 1 +160.68 +/- 59.25
204857 ncm-dbt-04 1223382 162 63 20 79 +94.48 +/- 24.05 0 4 30 47 0 +205.46 +/- 63.41
204856 ncm-dbt-02 1195936 170 67 21 82 +96.41 +/- 27.1 1 1 39 39 5 +188.13 +/- 54.0
204855 ncm-dbt-05 1211551 168 70 27 71 +90.94 +/- 24.97 0 4 35 43 2 +185.38 +/- 58.22
204854 ncm-dbt-06 1248325 170 56 19 95 +76.84 +/- 26.28 0 6 39 37 3 +147.19 +/- 54.96
204853 ncm-dbt-01 1120130 168 66 20 82 +97.62 +/- 25.91 0 5 30 47 2 +202.06 +/- 63.42
204558 ncm-dbt-02 1196942 500 188 71 241 +82.83 +/- 14.58 0 16 105 125 4 +169.27 +/- 33.34
204557 ncm-dbt-05 1213883 500 179 56 265 +87.26 +/- 13.49 0 12 103 135 0 +187.16 +/- 33.6
204556 ncm-dbt-06 1235967 500 195 71 234 +88.0 +/- 14.27 0 13 104 129 4 +181.7 +/- 33.45
204555 ncm-dbt-01 1193479 500 188 66 246 +86.52 +/- 14.08 0 12 108 126 4 +178.11 +/- 32.72
204554 ncm-dbt-03 1254550 500 191 65 244 +89.48 +/- 14.3 0 12 105 128 5 +183.51 +/- 33.24
204553 ncm-dbt-04 1207140 500 188 58 254 +92.45 +/- 14.05 0 12 99 136 3 +194.57 +/- 34.34
204552 ncm-dbt-02 1191763 500 196 70 234 +89.48 +/- 14.88 0 17 94 135 4 +185.33 +/- 35.32
204551 ncm-dbt-05 1211624 500 191 63 246 +90.96 +/- 14.47 0 12 104 128 6 +185.33 +/- 33.42
204550 ncm-dbt-06 1250579 500 188 53 259 +96.19 +/- 13.8 0 11 95 142 2 +206.01 +/- 35.09
204549 ncm-dbt-01 1196996 500 165 59 276 +74.79 +/- 14.06 0 13 123 109 5 +148.85 +/- 30.34
204548 ncm-dbt-03 1234984 500 187 62 251 +88.74 +/- 15.96 0 23 85 136 6 +179.9 +/- 36.89
204547 ncm-dbt-04 1207419 500 177 54 269 +87.26 +/- 13.95 0 13 103 132 2 +183.51 +/- 33.63
204546 ncm-dbt-02 1194299 500 197 72 231 +88.74 +/- 14.43 0 14 101 131 4 +183.51 +/- 34.01
204545 ncm-dbt-05 1238798 500 175 71 254 +73.33 +/- 15.13 0 25 97 127 1 +152.18 +/- 34.67
204544 ncm-dbt-06 1244053 500 178 75 247 +72.61 +/- 14.69 1 17 113 116 3 +148.85 +/- 32.06
204543 ncm-dbt-01 1168687 500 195 69 236 +89.48 +/- 14.0 0 12 103 132 3 +187.16 +/- 33.6
204542 ncm-dbt-03 1227185 500 184 64 252 +85.04 +/- 13.28 0 11 108 131 0 +181.7 +/- 32.68
204541 ncm-dbt-04 1253005 500 186 76 238 +77.7 +/- 15.92 0 25 96 123 6 +153.86 +/- 34.84
204540 ncm-dbt-02 1199132 500 187 62 251 +88.74 +/- 14.57 0 16 96 135 3 +185.33 +/- 34.95
204539 ncm-dbt-05 1233634 500 186 54 260 +93.95 +/- 14.67 0 15 92 139 4 +196.45 +/- 35.72
204538 ncm-dbt-06 1211999 500 184 67 249 +82.83 +/- 15.68 0 21 98 124 7 +164.07 +/- 34.56
204537 ncm-dbt-01 1205429 500 181 72 247 +76.97 +/- 15.64 0 24 98 123 5 +153.86 +/- 34.52
204536 ncm-dbt-03 1255049 500 169 69 262 +70.43 +/- 15.02 0 23 107 117 3 +142.26 +/- 33.06
204535 ncm-dbt-04 1220028 500 207 69 224 +98.44 +/- 14.29 0 10 98 136 6 +204.07 +/- 34.47
204534 ncm-dbt-02 1201350 500 195 65 240 +92.45 +/- 14.65 0 16 91 140 3 +194.57 +/- 35.91
204533 ncm-dbt-05 1225136 500 180 65 255 +81.37 +/- 14.4 1 12 112 121 4 +167.53 +/- 32.08
204532 ncm-dbt-06 1246778 500 180 65 255 +81.37 +/- 14.54 1 14 107 125 3 +169.27 +/- 32.98
204531 ncm-dbt-01 1187092 500 183 72 245 +78.44 +/- 16.33 1 24 95 123 7 +155.54 +/- 35.01
204530 ncm-dbt-03 1213789 500 177 66 257 +78.43 +/- 14.6 0 17 109 120 4 +158.93 +/- 32.69
204529 ncm-dbt-04 1229211 500 183 64 253 +84.3 +/- 14.62 0 13 112 118 7 +167.53 +/- 32.08
204528 ncm-dbt-02 1194720 500 180 65 255 +81.36 +/- 13.81 0 10 120 115 5 +164.07 +/- 30.64
204527 ncm-dbt-05 1222551 500 185 63 252 +86.52 +/- 16.04 1 18 98 124 9 +171.02 +/- 34.58
204526 ncm-dbt-01 1195076 500 187 63 250 +88.0 +/- 14.27 0 12 107 126 5 +179.9 +/- 32.89
204525 ncm-dbt-03 1207872 500 206 66 228 +99.95 +/- 13.84 0 10 93 144 3 +213.85 +/- 35.47
204524 ncm-dbt-06 1220462 500 194 62 244 +93.95 +/- 15.39 0 16 94 132 8 +189.0 +/- 35.33
204523 ncm-dbt-04 1206851 500 185 61 254 +88.0 +/- 14.7 0 15 101 129 5 +179.9 +/- 34.03
177451 ncm-dbt-03 1508211 162 63 26 73 +80.77 +/- 26.71 0 6 34 39 2 +160.68 +/- 59.25
177450 ncm-dbt-01 1500623 168 60 30 78 +62.71 +/- 27.61 0 12 30 42 0 +129.8 +/- 62.03
177449 ncm-dbt-05 1502659 166 63 18 85 +96.59 +/- 26.11 0 4 33 43 3 +193.65 +/- 60.18
177448 ncm-dbt-06 1502817 166 61 28 77 +70.0 +/- 27.71 0 9 34 38 2 +136.36 +/- 59.13
177447 ncm-dbt-02 1513945 168 57 24 87 +69.14 +/- 23.15 0 4 44 35 1 +139.38 +/- 50.51
177446 ncm-dbt-04 1496388 170 64 19 87 +94.21 +/- 26.33 0 6 30 47 2 +193.58 +/- 63.3

Commit

Commit ID 08e0f52b77edb929989c68c49e954b9bc5d7d67e
Author Michael Chaly
Date 2022-03-28 20:37:09 UTC
In movepicker increase priority for moves that evade a capture This idea is a mix of koivisto idea of threat history and heuristic that was simplified some time ago in LMR - decreasing reduction for moves that evade a capture. Instead of doing so in LMR this patch does it in movepicker - to do this it calculates squares that are attacked by different piece types and pieces that are located on this squares and boosts up weight of moves that make this pieces land on a square that is not under threat. Boost is greater for pieces with bigger material values. Special thanks to koivisto and seer authors for explaining me ideas behind threat history. Passed STC: https://tests.stockfishchess.org/tests/view/62406e473b32264b9aa1478b LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 19816 W: 5320 L: 5072 D: 9424 Ptnml(0-2): 86, 2165, 5172, 2385, 100 Passed LTC: https://tests.stockfishchess.org/tests/view/62407f2e3b32264b9aa149c8 LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 51200 W: 13805 L: 13500 D: 23895 Ptnml(0-2): 44, 5023, 15164, 5322, 47 closes https://github.com/official-stockfish/Stockfish/pull/3970 bench 7736491
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