Dev Builds » 20210117-0835

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 08:21:29 1970543 3342 2700 12 630 +385.9 +/- 13.55
ncm-et-4 08:21:55 1966143 3320 2640 16 664 +372.59 +/- 13.2
ncm-et-9 08:21:43 1969389 3322 2653 21 648 +374.38 +/- 13.38
ncm-et-10 08:21:27 1962144 3303 2616 18 669 +369.09 +/- 13.16
ncm-et-13 08:21:08 1962748 3351 2634 22 695 +362.73 +/- 12.91
ncm-et-15 08:21:47 1965805 3362 2659 20 683 +367.63 +/- 13.02
20000 15902 109 3989 +371.93 +/- 5.38

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
142530 ncm-et-10 2021-01-18 21:14 00:45:33 1961085 303 240 0 63 +374.18 +/- 43.24 ↓
142529 ncm-et-4 2021-01-18 21:12 00:48:09 1969398 320 244 4 72 +338.04 +/- 40.6 ↓
142528 ncm-et-9 2021-01-18 21:11 00:48:40 1974358 322 259 2 61 +379.91 +/- 44.24 ↓
142527 ncm-et-3 2021-01-18 21:08 00:51:41 1967717 342 263 1 78 +351.18 +/- 38.78 ↓
142526 ncm-et-13 2021-01-18 21:08 00:52:22 1957262 351 276 4 71 +358.74 +/- 40.93 ↓
142525 ncm-et-15 2021-01-18 21:06 00:54:07 1969418 362 301 4 57 +402.39 +/- 45.86 ↓
142524 ncm-et-10 2021-01-18 19:58 01:15:44 1961845 500 390 5 105 +354.5 +/- 33.5 ↓
142523 ncm-et-4 2021-01-18 19:55 01:15:36 1962149 500 398 2 100 +374.11 +/- 34.27 ↓
142522 ncm-et-9 2021-01-18 19:54 01:16:05 1962458 500 421 4 75 +417.32 +/- 39.84 ↓
142521 ncm-et-3 2021-01-18 19:52 01:15:05 1974829 500 396 2 102 +370.41 +/- 33.92 ↓
142520 ncm-et-13 2021-01-18 19:51 01:15:19 1963378 500 386 7 107 +344.48 +/- 33.19 ↓
142519 ncm-et-15 2021-01-18 19:50 01:14:51 1967389 500 392 2 106 +363.2 +/- 33.24 ↓
142518 ncm-et-10 2021-01-18 18:42 01:14:53 1968333 500 390 5 105 +354.5 +/- 33.5 ↓
142517 ncm-et-4 2021-01-18 18:38 01:16:06 1963378 500 401 3 96 +377.87 +/- 35.05 ↓
142516 ncm-et-9 2021-01-18 18:36 01:16:48 1966474 500 389 3 108 +356.21 +/- 32.96 ↓
142515 ncm-et-3 2021-01-18 18:36 01:14:53 1969397 500 407 2 91 +391.57 +/- 36.01 ↓
142514 ncm-et-13 2021-01-18 18:36 01:14:21 1961690 500 401 3 96 +377.87 +/- 35.05 ↓
142513 ncm-et-15 2021-01-18 18:33 01:15:27 1973115 500 390 4 106 +356.21 +/- 33.31 ↓
142512 ncm-et-10 2021-01-18 17:24 01:16:17 1969396 500 408 2 90 +393.6 +/- 36.22 ↓
142511 ncm-et-4 2021-01-18 17:21 01:15:36 1966459 500 400 0 100 +381.69 +/- 34.16 ↓
142510 ncm-et-9 2021-01-18 17:20 01:14:46 1966621 500 393 5 102 +359.68 +/- 34.0 ↓
142509 ncm-et-13 2021-01-18 17:19 01:15:14 1965996 500 408 1 91 +395.65 +/- 35.96 ↓
142508 ncm-et-3 2021-01-18 17:19 01:15:50 1963384 500 410 3 87 +395.65 +/- 36.9 ↓
142507 ncm-et-15 2021-01-18 17:19 01:13:24 1961995 500 397 3 100 +370.41 +/- 34.31 ↓
142506 ncm-et-10 2021-01-18 16:07 01:16:38 1957400 500 402 3 95 +379.78 +/- 35.24 ↓
142505 ncm-et-4 2021-01-18 16:04 01:15:56 1970955 500 407 3 90 +389.56 +/- 36.25 ↓
142504 ncm-et-9 2021-01-18 16:04 01:15:04 1969263 500 398 3 99 +372.25 +/- 34.49 ↓
142503 ncm-et-13 2021-01-18 16:04 01:14:50 1965072 500 393 3 104 +363.2 +/- 33.62 ↓
142502 ncm-et-3 2021-01-18 16:03 01:14:48 1969408 500 424 1 75 +431.48 +/- 39.8 ↓
142501 ncm-et-15 2021-01-18 16:03 01:15:19 1947735 500 397 0 103 +375.98 +/- 33.63 ↓
142500 ncm-et-10 2021-01-18 14:50 01:15:34 1960925 500 395 1 104 +370.41 +/- 33.52 ↓
142499 ncm-et-13 2021-01-18 14:48 01:14:17 1963229 500 384 3 113 +347.77 +/- 32.18 ↓
142498 ncm-et-9 2021-01-18 14:48 01:15:18 1976074 500 394 1 105 +368.59 +/- 33.35 ↓
142497 ncm-et-4 2021-01-18 14:48 01:15:33 1958788 500 402 3 95 +379.78 +/- 35.24 ↓
142496 ncm-et-3 2021-01-18 14:47 01:14:45 1972515 500 401 1 98 +381.7 +/- 34.59 ↓
142495 ncm-et-15 2021-01-18 14:47 01:14:51 1967714 500 389 3 108 +356.21 +/- 32.96 ↓
142494 ncm-et-13 2021-01-18 13:32 01:14:45 1962610 500 386 1 113 +354.5 +/- 32.09 ↓
142493 ncm-et-10 2021-01-18 13:32 01:16:48 1956025 500 391 2 107 +361.43 +/- 33.08 ↓
142492 ncm-et-3 2021-01-18 13:32 01:14:27 1976551 500 399 2 99 +375.98 +/- 34.46 ↓
142491 ncm-et-9 2021-01-18 13:32 01:15:02 1970481 500 399 3 98 +374.11 +/- 34.68 ↓
142490 ncm-et-15 2021-01-18 13:32 01:13:48 1973269 500 393 4 103 +361.43 +/- 33.81 ↓
142489 ncm-et-4 2021-01-18 13:32 01:14:59 1971878 500 388 1 111 +357.94 +/- 32.39 ↓

Commit

Commit ID 77eeea407c9d10cf6dbca6f4e07efbbe836c4fb0
Author Lolligerhans
Date 2021-01-17 08:35:59 UTC
Add penalty for doubled pawns in agile structure Give an additional penalty of S(20, 10) for any doubled pawn if none of the opponent's pawns is facing any of our - pawns or - pawn attacks; that means, each of their pawns can push at least one square without being captured. This ignores their non-pawns pieces and attacks. One possible justification: Their pawns' ability to push freely provides options to react to our threats by changing their pawn structure. Our doubled pawns however will likely lead to an exploitable weakness, even if the pawn structure is not yet fixed. Note that the notion of "their pawns not being fixed" is symmetric for both players: If all of their pawns can push freely so can ours. All pawns being freely pushable might just be an early-game-indicator. However, it can trigger during endgame pawns races, where doubled pawns are especially hindering, too. LTC LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 134976 W: 17964 L: 17415 D: 99597 Ptnml(0-2): 998, 12702, 39619, 13091, 1078 https://tests.stockfishchess.org/tests/view/5ffdd5316019e097de3ef281 STC LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 35640 W: 7219 L: 6904 D: 21517 Ptnml(0-2): 645, 4096, 8084, 4289, 706 https://tests.stockfishchess.org/tests/view/5ffda4a16019e097de3ef265 closes https://github.com/official-stockfish/Stockfish/pull/3302 Bench: 4363873
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