Dev Builds » 20220205-0640

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 14:45:13 1263308 4898 1773 702 2423 +77.22 +/- 4.76 5 172 1062 1167 43 +156.31 +/- 10.44
ncm-dbt-02 14:41:02 1295038 4872 1777 718 2377 +76.74 +/- 4.96 1 214 1001 1165 55 +152.42 +/- 10.77
ncm-dbt-03 14:45:08 1302840 4936 1776 737 2423 +74.24 +/- 4.84 1 214 1042 1167 44 +148.67 +/- 10.55
ncm-dbt-04 14:46:16 1291090 4956 1820 727 2409 +77.9 +/- 4.72 2 176 1073 1181 46 +156.95 +/- 10.38
ncm-dbt-05 00:33:41 1458333 162 60 27 75 +71.77 +/- 26.94 0 8 33 39 1 +145.15 +/- 60.11
ncm-dbt-06 00:33:48 1456962 176 61 29 86 +63.88 +/- 29.03 1 9 39 35 4 +118.93 +/- 55.13
20000 7267 2940 9793 +76.37 +/- 2.39 10 793 4250 4754 193 +153.19 +/- 5.22

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
181780 ncm-dbt-02 1229660 204 80 32 92 +83.31 +/- 23.32 0 6 45 48 3 +164.58 +/- 51.1
181779 ncm-dbt-01 1186972 234 86 35 113 +76.95 +/- 23.06 0 8 56 47 6 +140.87 +/- 45.52
181778 ncm-dbt-03 1249063 270 96 34 140 +81.23 +/- 20.22 0 10 55 68 2 +165.99 +/- 46.34
181777 ncm-dbt-04 1240786 292 109 43 140 +79.91 +/- 19.09 0 11 59 75 1 +166.32 +/- 44.72
181776 ncm-dbt-02 1233072 500 186 70 244 +82.1 +/- 15.53 0 20 101 122 7 +162.35 +/- 34.05
181775 ncm-dbt-01 1173395 500 193 71 236 +86.52 +/- 14.67 0 17 97 133 3 +179.9 +/- 34.76
181774 ncm-dbt-03 1244033 500 176 80 244 +67.54 +/- 13.95 0 17 122 109 2 +137.37 +/- 30.65
181773 ncm-dbt-04 1239265 500 182 79 239 +72.61 +/- 14.97 0 20 112 113 5 +143.89 +/- 32.25
181772 ncm-dbt-02 1210125 500 183 75 242 +76.25 +/- 15.62 0 23 102 119 6 +150.51 +/- 33.87
181771 ncm-dbt-01 1184290 500 185 62 253 +87.26 +/- 14.4 0 13 106 126 5 +178.11 +/- 33.1
181770 ncm-dbt-03 1218106 500 194 77 229 +82.83 +/- 16.2 1 23 90 130 6 +167.53 +/- 35.92
181769 ncm-dbt-04 1209417 500 195 69 236 +89.48 +/- 15.02 0 16 98 130 6 +181.7 +/- 34.58
181768 ncm-dbt-02 1231957 500 200 69 231 +93.2 +/- 16.06 0 19 91 130 10 +183.51 +/- 35.86
181767 ncm-dbt-01 1166695 500 182 77 241 +74.06 +/- 15.81 2 19 107 116 6 +148.85 +/- 33.05
181766 ncm-dbt-03 1251334 500 190 73 237 +82.83 +/- 15.68 0 18 107 115 10 +158.93 +/- 33.03
181765 ncm-dbt-04 1247331 500 179 79 242 +70.43 +/- 14.48 0 20 112 116 2 +143.89 +/- 32.25
181764 ncm-dbt-02 1234860 500 187 68 245 +84.3 +/- 15.59 0 21 95 128 6 +169.27 +/- 35.09
181763 ncm-dbt-01 1213260 500 173 81 246 +64.66 +/- 14.12 1 16 125 106 2 +132.54 +/- 30.2
181762 ncm-dbt-03 1234143 500 181 74 245 +75.52 +/- 15.2 0 23 100 124 3 +153.86 +/- 34.2
181761 ncm-dbt-04 1223452 500 188 73 239 +81.37 +/- 14.68 1 12 114 117 6 +164.07 +/- 31.75
181760 ncm-dbt-02 1229212 500 182 73 245 +76.97 +/- 15.64 0 22 104 117 7 +150.51 +/- 33.54
181759 ncm-dbt-01 1187317 500 178 70 252 +76.25 +/- 14.67 1 16 110 120 3 +157.24 +/- 32.52
181758 ncm-dbt-03 1224949 500 181 80 239 +71.16 +/- 15.05 0 21 112 112 5 +140.62 +/- 32.26
181757 ncm-dbt-04 1237884 500 176 75 249 +71.16 +/- 14.92 0 20 114 111 5 +140.62 +/- 31.94
181756 ncm-dbt-02 1220433 500 188 73 239 +81.36 +/- 14.82 0 16 109 119 6 +162.35 +/- 32.67
181755 ncm-dbt-01 1183743 500 179 74 247 +74.06 +/- 14.46 0 18 112 117 3 +150.51 +/- 32.22
181754 ncm-dbt-03 1255126 500 183 69 248 +80.63 +/- 15.08 0 18 106 120 6 +160.64 +/- 33.2
181753 ncm-dbt-04 1216846 500 176 73 251 +72.61 +/- 14.69 0 23 101 126 0 +152.18 +/- 34.03
181752 ncm-dbt-02 1244337 500 173 75 252 +68.99 +/- 15.37 0 25 106 115 4 +137.37 +/- 33.21
181751 ncm-dbt-01 1170204 500 185 76 239 +76.97 +/- 14.83 0 19 107 120 4 +155.54 +/- 33.04
181750 ncm-dbt-04 1219075 500 195 70 235 +88.74 +/- 15.28 0 15 104 122 9 +174.55 +/- 33.5
181749 ncm-dbt-03 1230864 500 168 64 268 +73.33 +/- 14.85 0 22 104 122 2 +150.51 +/- 33.54
181748 ncm-dbt-02 1232870 500 159 76 265 +58.21 +/- 15.7 1 29 109 108 3 +116.78 +/- 32.73
181747 ncm-dbt-01 1228807 500 174 74 252 +70.44 +/- 16.19 1 27 98 119 5 +140.62 +/- 34.44
181746 ncm-dbt-03 1245856 500 169 80 251 +62.51 +/- 15.37 0 28 108 111 3 +124.6 +/- 32.89
181745 ncm-dbt-04 1228665 500 174 79 247 +66.82 +/- 14.62 1 17 122 106 4 +134.15 +/- 30.68
181744 ncm-dbt-01 1184931 500 181 59 260 +86.52 +/- 14.53 0 15 102 129 4 +178.11 +/- 33.85
181743 ncm-dbt-02 1241702 500 176 81 243 +66.82 +/- 15.8 0 30 98 119 3 +134.15 +/- 34.4
181742 ncm-dbt-04 1226061 500 194 72 234 +86.52 +/- 15.23 0 17 101 125 7 +172.78 +/- 34.05
181741 ncm-dbt-03 1251762 500 172 78 250 +66.1 +/- 15.52 0 28 103 116 3 +132.54 +/- 33.65
172509 ncm-dbt-05 1459002 12 3 0 9 +88.66 +/- 75.75 0 0 3 3 0 +190.73 +/- 238.47
172508 ncm-dbt-04 1445452 14 5 3 6 +49.96 +/- 94.42 0 1 3 3 0 +102.11 +/- 234.06
172507 ncm-dbt-01 1454262 14 6 1 7 +129.72 +/- 68.06 0 0 2 5 0 +311.09 +/- 530.6
172506 ncm-dbt-03 1458409 16 7 5 4 +43.62 +/- 53.54 0 0 6 2 0 +88.68 +/- 116.18
172505 ncm-dbt-02 1452107 18 7 4 7 +58.41 +/- 55.66 0 0 6 3 0 +120.35 +/- 127.72
172504 ncm-dbt-06 1457072 26 7 4 15 +40.26 +/- 67.57 0 2 6 5 0 +81.65 +/- 148.87
172503 ncm-dbt-05 1459300 50 20 8 22 +85.04 +/- 51.0 0 3 7 15 0 +181.7 +/- 134.48
172502 ncm-dbt-04 1444863 50 13 4 33 +63.22 +/- 44.25 0 2 12 11 0 +130.94 +/- 101.68
172501 ncm-dbt-03 1457073 50 19 3 28 +115.21 +/- 47.81 0 1 8 15 1 +240.82 +/- 132.75
172500 ncm-dbt-01 1448161 50 17 7 26 +70.43 +/- 45.16 0 2 11 12 0 +147.19 +/- 107.43
172499 ncm-dbt-02 1458260 50 21 4 25 +123.0 +/- 36.12 0 0 8 17 0 +288.02 +/- 131.84
172498 ncm-dbt-06 1454553 50 11 11 28 +0.01 +/- 54.93 1 5 12 7 0 +13.9 +/- 100.98
172497 ncm-dbt-05 1457812 50 17 12 21 +34.84 +/- 47.97 0 3 15 6 1 +56.07 +/- 87.47
172496 ncm-dbt-03 1459749 50 19 11 20 +56.07 +/- 47.61 0 3 11 11 0 +115.23 +/- 106.91
172495 ncm-dbt-01 1450028 50 16 9 25 +48.94 +/- 37.02 0 0 19 5 1 +85.02 +/- 62.51
172494 ncm-dbt-04 1449402 50 17 5 28 +85.04 +/- 46.59 0 2 9 14 0 +181.7 +/- 121.14
172493 ncm-dbt-02 1456205 50 19 10 21 +63.22 +/- 44.25 0 2 12 11 0 +130.94 +/- 101.68
172492 ncm-dbt-06 1459151 50 23 6 21 +122.99 +/- 52.64 0 0 11 11 3 +219.84 +/- 104.3
172491 ncm-dbt-03 1459306 50 21 9 20 +85.02 +/- 51.0 0 2 10 12 1 +164.07 +/- 113.84
172490 ncm-dbt-04 1446762 50 17 3 30 +99.92 +/- 42.49 0 0 12 12 1 +200.21 +/- 97.77
172489 ncm-dbt-05 1457220 50 20 7 23 +92.45 +/- 47.1 0 2 8 15 0 +200.24 +/- 129.69
172488 ncm-dbt-01 1454258 50 18 6 26 +85.02 +/- 51.0 0 2 10 12 1 +164.07 +/- 113.84
172487 ncm-dbt-06 1457072 50 20 8 22 +85.02 +/- 51.0 0 2 10 12 1 +164.07 +/- 113.84
172486 ncm-dbt-02 1455743 50 16 8 26 +56.07 +/- 38.31 0 1 15 9 0 +115.23 +/- 84.94

Commit

Commit ID 4d3950c6eb80c932af00f6495668d5c5adf3701b
Author Michael Chaly
Date 2022-02-05 06:40:21 UTC
Reintroduce razoring Razoring was simplified away some years ago, this patch reintroduces it in a slightly different form. Now for low depths if eval is far below alpha we check if qsearch can push it above alpha - and if it can't we return a fail low. passed STC https://tests.stockfishchess.org/tests/view/61fbf968d508ec6a1c9f3274 LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 226120 W: 61106 L: 60472 D: 104542 Ptnml(0-2): 1118, 25592, 59080, 26078, 1192 passed LTC https://tests.stockfishchess.org/tests/view/61fcc569d508ec6a1c9f5617 LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 113128 W: 30851 L: 30397 D: 51880 Ptnml(0-2): 114, 11483, 32926, 11917, 124 closes https://github.com/official-stockfish/Stockfish/pull/3921 bench 4684080
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