| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: protonspring
Date: Sat Mar 7 10:55:15 2020 +0100 Timestamp: 1583574915 Cleanup KBPsK endgame * Clarify distinction between strong side pawns and all pawns. * Simplify and speed-up determination of pawns on the same file. * Clarify comments. * more_than_one() is probably faster than pos.count. Passed STC: LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 40696 W: 7856 L: 7740 D: 25100 Elo +0.99 Ptnml(0-2): 584, 4519, 10054, 4579, 612 http://tests.stockfishchess.org/tests/view/5e6153b1e42a5c3b3ca2e1a9 closes https://github.com/official-stockfish/Stockfish/pull/2574 No functional change. |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: protonspring
Date: Sat Mar 7 10:48:16 2020 +0100 Timestamp: 1583574496 Small speed-up in BetweenBB A speed-up removing some comparisons. closes https://github.com/official-stockfish/Stockfish/pull/2571 No functional change. |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: protonspring
Date: Wed Mar 4 07:17:04 2020 +0100 Timestamp: 1583302624 Use equations for PushAway and PushClose A functional simplification replacing the corresponding arrays. Tested in two variants, also the simpler one performs well, even though differences to master should be minimal. STC LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 57864 W: 11092 L: 11001 D: 35771 Elo +0.55 Ptnml(0-2): 826, 6458, 14320, 6455, 873 http://tests.stockfishchess.org/tests/view/5e5da5b6e42a5c3b3ca2e05c LTC LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 7198 W: 982 L: 883 D: 5333 Elo +4.78 Ptnml(0-2): 33, 575, 2296, 650, 45 http://tests.stockfishchess.org/tests/view/5e5df13ae42a5c3b3ca2e077 LTC (This exact version. . . more simplified) LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 5392 W: 729 L: 631 D: 4032 Elo +6.32 Ptnml(0-2): 23, 405, 1751, 485, 32 http://tests.stockfishchess.org/tests/view/5e5ead99e42a5c3b3ca2e0e4 closes https://github.com/official-stockfish/Stockfish/pull/2570 Bench 5123316 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: protonspring
Date: Wed Mar 4 07:11:48 2020 +0100 Timestamp: 1583302308 Consolidate Square Flipping Add a flip_rank() and flip_file() so that all of the square flipping can be consolidated. STC LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 57234 W: 11064 L: 10969 D: 35201 Elo +0.58 Ptnml(0-2): 822, 6562, 13801, 6563, 869 http://tests.stockfishchess.org/tests/view/5e5d2f2aafe6254521f2ffaa closes https://github.com/official-stockfish/Stockfish/pull/2568 No functional change. |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: Joost VandeVondele
Date: Sun Mar 1 09:31:58 2020 +0100 Timestamp: 1583051518 Small cleanups closes https://github.com/official-stockfish/Stockfish/pull/2546 No functional change. |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: Guenther Demetz
Date: Sun Mar 1 09:20:31 2020 +0100 Timestamp: 1583050831 Simplify lowply-history logic Don't restrict usage to ttPv nodes exclusively STC: http://tests.stockfishchess.org/tests/view/5e5634f284a82b4acd41499a LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 152796 W: 29146 L: 29178 D: 94472 Elo -0.07 Ptnml(0-2): 2590, 17792, 35628, 17836, 2552 LTC: http://tests.stockfishchess.org/tests/view/5e575d4984a82b4acd4149e8 LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 20078 W: 2688 L: 2587 D: 14803 Elo +1.75 Ptnml(0-2): 139, 1914, 5853, 1973, 160 closes https://github.com/official-stockfish/Stockfish/pull/2565 bench: 4923286 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: Moez Jellouli
Date: Thu Feb 27 13:14:51 2020 +0100 Timestamp: 1582805691 Weak queen protection Extra penalty if weak piece is only protected by a queen. STC: http://tests.stockfishchess.org/tests/view/5e53c6ab84a82b4acd4148fa LLR: 2.96 (-2.94,2.94) {-0.50,1.50} Total: 44630 W: 8615 L: 8359 D: 27656 Elo +1.99 Ptnml(0-2): 746, 5156, 10323, 5276, 814 LTC: http://tests.stockfishchess.org/tests/view/5e54e05d84a82b4acd414947 LLR: 2.94 (-2.94,2.94) {0.25,1.75} Total: 175480 W: 23085 L: 22409 D: 129986 Elo +1.34 Ptnml(0-2): 1264, 16494, 51678, 16910, 1394 closes https://github.com/official-stockfish/Stockfish/pull/2564 Bench: 4923286 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: AndyGrant
Date: Tue Feb 25 21:10:10 2020 +0100 Timestamp: 1582661410 Fix TT write in MultiPV case. fixes an error reported earlier as https://github.com/official-stockfish/Stockfish/issues/2404 by @AndyGrant. MultiPV at root shouldn't write to the TT for later lines, as that is neither the eval nor the bestmove for that position. Fixing this error doesn't matter for playing games (http://tests.stockfishchess.org/tests/view/5dcdbd810ebc590256324a11). However, it can lead to wrong mate announcements as reported by @uriblass. In particular the following testcase gives wrong results for the second search, prior to this patch: ``` setoption name MultiPV value 2 position fen 5R2/2kB2p1/p2bR3/8/3p1B2/8/PPP5/2K5 b - - 0 49 go depth 40 position fen 2B2R2/3r2p1/p1kbR3/8/3p1B2/8/PPP5/2K5 b - - 8 48 go depth 40 ``` fixes https://github.com/official-stockfish/Stockfish/issues/2561 closes https://github.com/official-stockfish/Stockfish/pull/2562 Only affects MultiPV search. Bench: 4697493 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: 31m059
Date: Tue Feb 25 21:03:42 2020 +0100 Timestamp: 1582661022 Use single param for Outpost and ReachableOutpost. In November 2019, as a result of the simplification of rank-based outposts by 37698b0, separate bonuses were introduced for outposts that are currently occupied and outposts that are reachable on the next move. However, the values of these two bonuses are quite similar, and they have remained that way for three months of development. It appears that we can safely retire the separate ReachableOutpost parameter and use the same Outpost bonus in both cases, restoring the basic principles of Stockfish outpost evaluation to their pre-November state, while also reducing the size of the parameter space. STC: LLR: 2.96 (-2.94,2.94) {-1.50,0.50} Total: 47680 W: 9213 L: 9092 D: 29375 Elo +0.88 Ptnml(0-2): 776, 5573, 11071, 5594, 826 https://tests.stockfishchess.org/tests/view/5e51e33190a0a02810d09802 LTC: LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 14690 W: 1960 L: 1854 D: 10876 Elo +2.51 Ptnml(0-2): 93, 1381, 4317, 1435, 119 https://tests.stockfishchess.org/tests/view/5e52197990a0a02810d0980f closes https://github.com/official-stockfish/Stockfish/pull/2559 Bench: 4697493 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: Günther Demetz
Date: Sat Feb 22 21:32:32 2020 +0100 Timestamp: 1582403552 Improve move order near the root Current move histories are known to work well near the leaves, whilst at higher depths they aren't very helpful. To address this problem this patch introduces a table dedicated for what's happening at plies 0-3. It's structured like mainHistory with ply index instead of color. It get cleared with each new search and is filled during iterative deepening at higher depths when recording successful quiet moves near the root or traversing nodes which were in the principal variation (ttPv). Medium TC (20+0.2): https://tests.stockfishchess.org/tests/view/5e4d358790a0a02810d096dc LLR: 2.94 (-2.94,2.94) {-0.50,1.50} Total: 100910 W: 16682 L: 16376 D: 67852 Elo +1.05 Ptnml(0-2): 1177, 10983, 25883, 11181, 1231 LTC: https://tests.stockfishchess.org/tests/view/5e4e2cb790a0a02810d09714 LLR: 2.95 (-2.94,2.94) {0.25,1.75} Total: 80444 W: 10495 L: 10095 D: 59854 Elo +1.73 Ptnml(0-2): 551, 7479, 23803, 7797, 592 closes https://github.com/official-stockfish/Stockfish/pull/2557 Bench: 4705960 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: protonspring
Date: Thu Feb 20 08:32:17 2020 +0100 Timestamp: 1582183937 Updated KNNKP endgame. This is a patch that significantly improves playing KNNKP endgames: ``` Score of 2553 vs master: 132 - 38 - 830 [0.547] 1000 Elo difference: 32.8 +/- 8.7, LOS: 100.0 %, DrawRatio: 83.0 % ``` At the same time it reduces the evaluation of this mostly draw engame from ~7.5 to ~1.5 This patch does not regress against master in normal games: STC LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 96616 W: 18459 L: 18424 D: 59733 Elo +0.13 Ptnml(0-2): 1409, 10812, 23802, 10905, 1380 http://tests.stockfishchess.org/tests/view/5e49dfe6f8d1d52b40cd31bc LTC LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 49726 W: 6340 L: 6304 D: 37082 Elo +0.25 Ptnml(0-2): 239, 4227, 15906, 4241, 250 http://tests.stockfishchess.org/tests/view/5e4ab9ee16fb3df8c4cc01d0 Theory: KNNK is a dead draw, however the presence of the additional weakSide pawn opens up some mate opportunities. The idea is to block the pawn (preferably behind the Troitsky line) with one of the knights and press the weakSide king into a corner. If we can stalemate the king, we release the pawn with the knight (to avoid actual stalemate), and use the knight to complete the mate before the pawn promotes. This is also why there is an additional penalty for advancement of the pawn. closes https://github.com/official-stockfish/Stockfish/pull/2553 Bench: 4981770 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: protonspring
Date: Sat Feb 15 15:13:14 2020 +0100 Timestamp: 1581775994 Simplify Futility Move Count remove two constants STC LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 62050 W: 11903 L: 11802 D: 38345 Elo +0.57 Ptnml(0-2): 1002, 7346, 14283, 7320, 1065 http://tests.stockfishchess.org/tests/view/5e41d73be70d848499f63c6d LTC LLR: 2.93 (-2.94,2.94) {-1.50,0.50} Total: 12850 W: 1679 L: 1572 D: 9599 Elo +2.89 Ptnml(0-2): 82, 1171, 3818, 1249, 96 http://tests.stockfishchess.org/tests/view/5e42bf07e70d848499f63cc0 Bench: 4762351 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: Joost VandeVondele
Date: Sat Feb 15 15:10:07 2020 +0100 Timestamp: 1581775807 Fix for incorrect VALUE_MATE_IN_MAX_PLY usage. Fixes #2533, fixes #2543, fixes #2423. the code that prevents false mate announcements depending on the TT state (GHI), incorrectly used VALUE_MATE_IN_MAX_PLY. The latter constant, however, also includes, counterintuitively, the TB win range. This patch fixes that, by restoring the behavior for TB win scores, while retaining the false mate correctness, and improving the mate finding ability. In particular no alse mates are announced with the poisened hash testcase ``` position fen 8/8/8/3k4/8/8/6K1/7R w - - 0 1 go depth 40 position fen 8/8/8/3k4/8/8/6K1/7R w - - 76 1 go depth 20 ucinewgame ``` mates are found with the testcases reported in #2543 ``` position fen 4k3/3pp3/8/8/8/8/2PPP3/4K3 w - - 0 1 setoption name Hash value 1024 go depth 55 ucinewgame ``` and ``` position fen 4k3/4p3/8/8/8/8/3PP3/4K3 w - - 0 1 setoption name Hash value 1024 go depth 45 ucinewgame ``` furthermore, on the mate finding benchmark (ChestUCI_23102018.epd), performance improves over master, roughly reaching performance with the false mate protection reverted ``` Analyzing 6566 mate positions for best and found mates: ----------------best ---------------found nodes master revert fixed master revert fixed 16000000 4233 4236 4235 5200 5201 5199 32000000 4583 4585 4585 5417 5424 5418 64000000 4852 4853 4855 5575 5584 5579 128000000 5071 5068 5066 5710 5720 5716 256000000 5280 5282 5279 5819 5827 5826 512000000 5471 5468 5468 5919 5935 5932 ``` On a testcase with TB enabled, progress is made consistently, contrary to master ``` setoption name SyzygyPath value ../../../syzygy/3-4-5/ setoption name Hash value 2048 position fen 1R6/3k4/8/K2p4/4n3/2P5/8/8 w - - 0 1 go depth 58 ucinewgame ``` The PR (prior to a rewrite for clarity) passed STC: LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 65405 W: 12454 L: 12384 D: 40567 Elo +0.37 Ptnml(0-2): 920, 7256, 16285, 7286, 944 http://tests.stockfishchess.org/tests/view/5e441a3be70d848499f63d15 passed LTC: LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 27096 W: 3477 L: 3413 D: 20206 Elo +0.82 Ptnml(0-2): 128, 2215, 8776, 2292, 122 http://tests.stockfishchess.org/tests/view/5e44e277e70d848499f63d63 The incorrectly named VALUE_MATE_IN_MAX_PLY and VALUE_MATED_IN_MAX_PLY were renamed into VALUE_TB_WIN_IN_MAX_PLY and VALUE_TB_LOSS_IN_MAX_PLY, and correclty defined VALUE_MATE_IN_MAX_PLY and VALUE_MATED_IN_MAX_PLY were introduced. One further (corner case) mistake using these constants was fixed (go mate X), which could lead to a premature return if X > MAX_PLY / 2, but TB were present. Thanks to @svivanov72 for one of the reports and help fixing the issue. closes https://github.com/official-stockfish/Stockfish/pull/2552 Bench: 4932981 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: Vizvezdenec
Date: Mon Feb 10 09:19:02 2020 +0100 Timestamp: 1581322742 Modify singular beta for ttPv positions. This patch lowers singular beta for positions that have been in pv and are not pv nodes. The idea of using ttpv && !PvNode improved scaling with TC and could be useful for other search heuristics. passed STC http://tests.stockfishchess.org/tests/view/5e3f6d7ce70d848499f63bbc LLR: 2.94 (-2.94,2.94) {-0.50,1.50} Total: 154953 W: 29688 L: 29272 D: 95993 Elo +0.93 Ptnml(0-2): 2616, 17912, 36037, 18210, 2673 passed LTC http://tests.stockfishchess.org/tests/view/5e405561e70d848499f63bfa LLR: 2.95 (-2.94,2.94) {0.25,1.75} Total: 70974 W: 9305 L: 8932 D: 52737 Elo +1.83 Ptnml(0-2): 466, 6658, 20920, 6826, 569 closes https://github.com/official-stockfish/Stockfish/pull/2550 Bench: 4932981 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: Joost VandeVondele
Date: Mon Feb 10 09:12:07 2020 +0100 Timestamp: 1581322327 Fix wrong assert. can trigger an abort when compiling with debug=yes, and using 7men TB. The assert should check that less than 8 pieces are in the key for each side, matching the assumption that underlies the FEN string construction. Also take explicitly care of a 'v' character in material strings. Fixes an issue reported in the forum: https://groups.google.com/d/msg/fishcooking/yoVC7etIpz0/7mS7ntZMBAAJ closes https://github.com/official-stockfish/Stockfish/pull/2547 No functional change. |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: Joost VandeVondele
Date: Wed Feb 5 15:32:29 2020 +0100 Timestamp: 1580913149 Small cleanups. closes https://github.com/official-stockfish/Stockfish/pull/2532 Bench: 4869669 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: Vizvezdenec
Date: Wed Feb 5 13:42:24 2020 +0100 Timestamp: 1580906544 Reintroduce king infiltration This patch reintroduces the recently simplified king infiltration bonus in initiative calculation, doubling its effect, and compensating more. passed STC http://tests.stockfishchess.org/tests/view/5e3476f630ae32da08941d5c LLR: 2.94 (-2.94,2.94) {-0.50,1.50} Total: 75323 W: 14434 L: 14140 D: 46749 Elo +1.36 Ptnml(0-2): 1231, 8729, 17528, 8826, 1331 passed LTC http://tests.stockfishchess.org/tests/view/5e377353e70d848499f638c1 LLR: 2.94 (-2.94,2.94) {0.25,1.75} Total: 171466 W: 22223 L: 21561 D: 127682 Elo +1.34 Ptnml(0-2): 1204, 15951, 50831, 16397, 1312 closes https://github.com/official-stockfish/Stockfish/pull/2545 Brench: 4869669 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: xoto10
Date: Sun Feb 2 07:11:49 2020 +0100 Timestamp: 1580623909 Simplify away king infiltration. STC : LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 91438 W: 17496 L: 17438 D: 56504 Elo +0.22 Ptnml(0-2): 1573, 10711, 21067, 10790, 1563 https://tests.stockfishchess.org/tests/view/5e34812630ae32da08941d65 LTC : LLR: 2.96 (-2.94,2.94) {-1.50,0.50} Total: 40485 W: 5246 L: 5177 D: 30062 Elo +0.59 Ptnml(0-2): 289, 3818, 11976, 3812, 327 https://tests.stockfishchess.org/tests/view/5e354daee70d848499f6380c closes https://github.com/official-stockfish/Stockfish/pull/2542 Bench: 5047825 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: xoto10
Date: Sat Feb 1 09:05:13 2020 +0100 Timestamp: 1580544313 Simplify Tweak late move reductions at root. Revert change from Jan 15. STC 10+0.1 : LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 65135 W: 12543 L: 12436 D: 40156 Elo +0.57 Ptnml(0-2): 1090, 7618, 14947, 7623, 1136 https://tests.stockfishchess.org/tests/view/5e334016708b13464ceea32e LTC 60+0.6 : LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 17768 W: 2286 L: 2191 D: 13291 Elo +1.86 Ptnml(0-2): 128, 1602, 5273, 1679, 140 https://tests.stockfishchess.org/tests/view/5e34011e57e1ecae66ec2aab closes https://github.com/official-stockfish/Stockfish/pull/2537 Bench: 4914050 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: Joost VandeVondele
Date: Fri Jan 31 19:48:44 2020 +0100 Timestamp: 1580496524 Revert 5 recent patches Revert 5 patches which were merged, but lead to a regression test that showed negative Elo gain: http://tests.stockfishchess.org/tests/view/5e307251ab2d69d58394fdb9 This was discussed in depth in: https://github.com/official-stockfish/Stockfish/issues/2531 Each patch was removed and tested as a simplification, full list below, and the whole combo as well. After the revert the regression test showed a neutral result: http://tests.stockfishchess.org/tests/view/5e334851708b13464ceea33c As a result of this experience, the SPRT testing bounds will be made more strict. Reverted patches: 1 Dynamic Complexity 6d0eabd5fe2961551477820ab7619e2c31e01ffd : STC 10+0.1 https://tests.stockfishchess.org/tests/view/5e31fcacec661e2e6a340d08 : LLR: 2.97 (-2.94,2.94) {-1.50,0.50} Total: 38130 W: 7326 L: 7189 D: 23615 Elo +1.25 Ptnml(0-2): 677, 4346, 8843, 4545, 646 LTC 60+0.6 https://tests.stockfishchess.org/tests/view/5e32c18fec661e2e6a340d73 : LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 38675 W: 4941 L: 4866 D: 28868 Elo +0.67 Ptnml(0-2): 270, 3556, 11429, 3584, 291 3 More bonus for bestMoves on past PV nodes 71e0b5385e2717679a57c6b77d8c7ac5fff3b89f : STC 10+0.1 https://tests.stockfishchess.org/tests/view/5e31fe93ec661e2e6a340d10 : LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 46100 W: 8853 L: 8727 D: 28520 Elo +0.95 Ptnml(0-2): 796, 5297, 10749, 5387, 813 LTC 60+0.6 https://tests.stockfishchess.org/tests/view/5e32c187ec661e2e6a340d71 : LLR: 2.96 (-2.94,2.94) {-1.50,0.50} Total: 16920 W: 2161 L: 2055 D: 12704 Elo +2.18 Ptnml(0-2): 115, 1498, 5006, 1569, 130 4 Tweak Restricted Piece Bonus 0ae00454ba6928d181b46103e5c83e6d58fcebe5 : STC 10+0.1 https://tests.stockfishchess.org/tests/view/5e31fefaec661e2e6a340d15 : LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 88328 W: 17060 L: 16997 D: 54271 Elo +0.25 Ptnml(0-2): 1536, 10446, 20169, 10422, 1581 LTC 60+0.6 https://tests.stockfishchess.org/tests/view/5e32c17aec661e2e6a340d6f : LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 34784 W: 4551 L: 4466 D: 25767 Elo +0.85 Ptnml(0-2): 255, 3279, 10061, 3345, 262 5 History update for pruned captures 01b6088af39902001d2d6844561b6a2faa549282 : STC 10+0.1 https://tests.stockfishchess.org/tests/view/5e31ff5eec661e2e6a340d1a : LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 29541 W: 5735 L: 5588 D: 18218 Elo +1.73 Ptnml(0-2): 483, 3445, 6820, 3469, 545 LTC 60+0.6 https://tests.stockfishchess.org/tests/view/5e32c196ec661e2e6a340d75 : LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 22177 W: 2854 L: 2757 D: 16566 Elo +1.52 Ptnml(0-2): 143, 2005, 6555, 2055, 164 6 Tweak trapped rook penalty 18fc21eba0368fd5e3c4c4b8ee1000c9ac445425 : STC 10+0.1 https://tests.stockfishchess.org/tests/view/5e31ffb1ec661e2e6a340d1c : LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 24476 W: 4727 L: 4569 D: 15180 Elo +2.24 Ptnml(0-2): 390, 2834, 5659, 2933, 417 LTC 60+0.6 https://tests.stockfishchess.org/tests/view/5e32c19eec661e2e6a340d77 : LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 97332 W: 12492 L: 12466 D: 72374 Elo +0.09 Ptnml(0-2): 690, 9107, 28738, 9034, 720 All 5 as one simplification : LTC 60+0.6 https://tests.stockfishchess.org/tests/view/5e334098708b13464ceea330 : LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 7829 W: 1079 L: 964 D: 5786 Elo +5.10 Ptnml(0-2): 52, 690, 2281, 781, 65 Bench: 5153165 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: Joost VandeVondele
Date: Wed Jan 29 07:25:18 2020 +0100 Timestamp: 1580279118 Fix compilation on android Fall back to the default implementation of aligned_ttmem_alloc, which was introduced as part of 39437f4e55aaa26ef9f0d5a1c762e560e9ffde32 Fixes #2524 No functional change. |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: joergoster
Date: Tue Jan 28 19:25:39 2020 +0100 Timestamp: 1580235939 Simplify hashfull calculation. We can simplify the calculation of the hashfull info by looping over exact 1,000 entries, and then divide the result by ClusterSize. Somewhat memory accesses, somewhat more accurate. Passed non-regression LTC https://tests.stockfishchess.org/tests/view/5e30079dab2d69d58394fd5d LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 30125 W: 3987 L: 3926 D: 22212 Elo +0.70 Ptnml(0-2): 177, 2504, 9558, 2642, 141 closes https://github.com/official-stockfish/Stockfish/pull/2523 No functional change. |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: Guenther Demetz
Date: Tue Jan 28 16:28:56 2020 +0100 Timestamp: 1580225336 More bonus for bestMoves on past PV nodes It looks like it is important to keep past PV (ttPv) nodes as close as possible to current PV nodes. Credits to Mark Tenzer (31m059) & Stefan Geschwentner who first tried ideas on ttPv nodes. STC: https://tests.stockfishchess.org/tests/view/5e2ff5efab2d69d58394fd52 LLR: 2.95 (-2.94,2.94) {-1.00,3.00} Total: 13302 W: 2647 L: 2507 D: 8148 Elo +3.66 Ptnml(0-2): 237, 1540, 2956, 1632, 260 LTC: https://tests.stockfishchess.org/tests/view/5e2fff38ab2d69d58394fd55 LLR: 2.95 (-2.94,2.94) {0.00,2.00} Total: 15797 W: 2137 L: 1960 D: 11700 Elo +3.89 Ptnml(0-2): 96, 1443, 4628, 1547, 130 closes https://github.com/official-stockfish/Stockfish/pull/2529 bench: 5545845 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: 31m059
Date: Tue Jan 28 10:31:25 2020 +0100 Timestamp: 1580203885 Less NMP if the position was previously in PV. The intention of the patch is to avoid aggressive null move pruning (NMP) in positions that have previously been found to be important (PV nodes). If we already do not apply NMP for current PV nodes, it makes sense to apply it less often for positions that have previously been PV nodes too. STC: LLR: 2.96 (-2.94,2.94) {-1.00,3.00} Total: 14959 W: 2921 L: 2782 D: 9256 Elo +3.23 Ptnml(0-2): 254, 1679, 3493, 1762, 282 http://tests.stockfishchess.org/tests/view/5e2f6637ab2d69d58394fcfd LTC: LLR: 2.95 (-2.94,2.94) {0.00,2.00} Total: 6442 W: 899 L: 753 D: 4790 Elo +7.88 Ptnml(0-2): 42, 549, 1885, 659, 61 http://tests.stockfishchess.org/tests/view/5e2f767bab2d69d58394fd04 closes https://github.com/official-stockfish/Stockfish/pull/2525 Bench: 4725546 |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: Alain SAVARD
Date: Mon Jan 27 18:14:10 2020 +0100 Timestamp: 1580145250 Dynamic Complexity based on psqt Adjust initiative score by psqt/2 instead of materialScore/2 which simplifies #2516 Passed STC http://tests.stockfishchess.org/tests/view/5e2e667dab2d69d58394fc73 LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 23198 W: 4506 L: 4353 D: 14339 Elo +2.29 Ptnml(0-2): 396, 2615, 5380, 2728, 418 Passed LTC http://tests.stockfishchess.org/tests/view/5e2ed75cab2d69d58394fcbf LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 8519 W: 1179 L: 1062 D: 6278 Elo +4.77 Ptnml(0-2): 50, 775, 2472, 843, 74 closes https://github.com/official-stockfish/Stockfish/pull/2522 Bench: 4684459 |