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The Major Piece\nCorrection History is indexed by side-to-move and the Zobrist key\nrepresenting the position of the King, Rook, and Queen of both sides.\nLikewise, the Minor Piece Correction History is indexed by side-to-move\nand the Zobrist key representing the position of the King, Knight, and\nBishop of both sides.\n\nAlso See:\nhttps://github.com/mcthouacbb/Sirius/commit/97b85bbaac88ff5a0f63e28776027dd3de77164e\nhttps://github.com/mcthouacbb/Sirius/commit/3099cdef2f13e29805654b5f8153e6ecd5853195\n\nIntroduced by @zzzzz151 in Starzix (https://github.com/zzzzz151/Starzix)\nchess engine. Non-Pawn correction history consists of side-to-move, side\nof Zobrist key, and a Zobrist key representing of the position of all\nnon-pawn pieces of **one side**. The non-pawn correction values for both\nkey sides are then summed.\n\nAlso See:\nhttps://github.com/zzzzz151/Starzix/commit/34911772f178c27b3a239dda0acb79c397c3a2f0\nhttps://github.com/zzzzz151/Starzix/commit/33e0df8dd2db1d4775974ab12e3390154697f47a\n\nThe weights on the final correction value of the above correction\nhistories, as well as existing correction histories, are then tuned in\ntwo separate SPSA sessions, totaling 75k games.\n\nSPSA1:\nhttps://tests.stockfishchess.org/tests/view/66e5243886d5ee47d953a86b\n(Stopped early due to some weights reaching the maximum value)\n\nSPSA2:\nhttps://tests.stockfishchess.org/tests/view/66e6a26f86d5ee47d953a965\n\nAlso thanks to @martinnovaak, (Motor\nhttps://github.com/martinnovaak/motor author) for insights and\nsuggestions.\n\nPassed STC:\nLLR: 2.94 (-2.94,2.94) <0.00,2.00>\nTotal: 23328 W: 6197 L: 5901 D: 11230\nPtnml(0-2): 82, 2582, 6041, 2876, 83\nhttps://tests.stockfishchess.org/tests/view/66e8787b86d5ee47d953ab6f\n\nPassed LTC:\nLLR: 2.94 (-2.94,2.94) <0.50,2.50>\nTotal: 10626 W: 2826 L: 2560 D: 5240\nPtnml(0-2): 4, 1054, 2941, 1300, 14\nhttps://tests.stockfishchess.org/tests/view/66e8ab2386d5ee47d953aba8\n\ncloses https://github.com/official-stockfish/Stockfish/pull/5598\n\nBench: 1011161","shortMessageHtmlLink":"Introduce Various Correction histories"}},{"before":"2680c9c7992f6565e9a2f0acc52260af55e56b5a","after":null,"ref":"refs/tags/stockfish-dev-20240909-2680c9c7","pushedAt":"2024-09-10T21:04:25.000Z","pushType":"branch_deletion","commitsCount":0,"pusher":{"login":"github-actions[bot]","name":null,"path":"/apps/github-actions","primaryAvatarUrl":"https://avatars.githubusercontent.com/in/15368?s=80&v=4"}},{"before":"2680c9c7992f6565e9a2f0acc52260af55e56b5a","after":"f677aee28baedcab4d3110d0a5c414621ed805c4","ref":"refs/heads/master","pushedAt":"2024-09-10T21:04:02.000Z","pushType":"push","commitsCount":3,"pusher":{"login":"Disservin","name":"disservin","path":"/Disservin","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/45608332?s=80&v=4"},"commit":{"message":"Fix net downloading script\n\nThe recent commit introduced a bug in the net downloading script that\nthe file is not downloaded correctly and the content is redirected to\nstdout.\n\ncloses https://github.com/official-stockfish/Stockfish/pull/5585\n\nNo functional change","shortMessageHtmlLink":"Fix net downloading script"}},{"before":"e0bfc4b69bbe928d6f474a46560bcc3b3f6709aa","after":"2680c9c7992f6565e9a2f0acc52260af55e56b5a","ref":"refs/heads/master","pushedAt":"2024-09-09T16:02:57.000Z","pushType":"push","commitsCount":10,"pusher":{"login":"Disservin","name":"disservin","path":"/Disservin","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/45608332?s=80&v=4"},"commit":{"message":"Small speedup in incremental accumulator updates\n\nInstead of updating at most two accumulators, update all accumluators\nduring incremental updates. 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As\nalways, you can freely download it at https://stockfishchess.org/download and\nuse it in the GUI of your choice.\n\nDon’t forget to join our Discord server[1] to get in touch with the community\nof developers and users of the project!\n\n*Quality of chess play*\n\nIn tests against Stockfish 16, this release brings an Elo gain of up to 46\npoints[2] and wins up to 4.5 times more game pairs[3] than it loses. In\npractice, high-quality moves are now found in less time, with a user upgrading\nfrom Stockfish 14 being able to analyze games at least 6 times[4] faster with\nStockfish 17 while maintaining roughly the same quality.\n\nDuring this development period, Stockfish won its 9th consecutive first place\nin the main league of the Top Chess Engine Championship (TCEC)[5], and the 24th\nconsecutive first place in the main events (bullet, blitz, and rapid) of the\nComputer Chess Championship (CCC)[6].\n\n*Update highlights*\n\n*Improved engine lines*\n\nThis release introduces principal variations (PVs) that are more informative\nfor mate and decisive table base (TB) scores. In both cases, the PV will\ncontain all moves up to checkmate. For mate scores, the PV shown is the best\nvariation known to the engine at that point, while for table base wins, it\nfollows, based on the TB, a sequence of moves that preserves the game outcome\nto checkmate.\n\n*NUMA performance optimization*\n\nFor high-end computers with multiple CPUs (typically a dual-socket architecture\nwith 100+ cores), this release automatically improves performance with a\n`NumaPolicy` setting that optimizes non-uniform memory access (NUMA).  Although\ntypical consumer hardware will not benefit, speedups of up to 2.8x[7] have been\nmeasured.\n\n*Shoutouts*\n\n*ChessDB*\n\nDuring the past 1.5 years, hundreds of cores have been continuously running\nStockfish to grow a database of analyzed positions. This chess cloud\ndatabase[8] now contains well over 45 billion positions, providing excellent\ncoverage of all openings and commonly played lines. This database is already\nintegrated into GUIs such as En Croissant[9] and Nibbler[10], which access it\nthrough the public API.\n\n*Leela Chess Zero*\n\nGenerally considered to be the strongest GPU engine, it continues to provide\nopen data which is essential for training our NNUE networks. They released\nversion 0.31.1[11] of their engine a few weeks ago, check it out!\n\n*Website redesign*\n\nOur website has undergone a redesign in recent months, most notably in our home\npage[12], now featuring a darker color scheme and a more modern aesthetic,\nwhile still maintaining its core identity. We hope you'll like it as much as we\ndo!\n\n*Thank you*\n\nThe Stockfish project builds on a thriving community of enthusiasts (thanks\neverybody!) who contribute their expertise, time, and resources to build a free\nand open-source chess engine that is robust, widely available, and very strong.\n\nWe would like to express our gratitude for the 11k stars[13] that light up our\nGitHub project! Thank you for your support and encouragement – your recognition\nmeans a lot to us.\n\nWe invite our chess fans to join the Fishtest testing framework[14] to\ncontribute compute resources needed for development. Programmers can contribute\nto the project either directly to Stockfish[15] (C++), to Fishtest[16] (HTML,\nCSS, JavaScript, and Python), to our trainer nnue-pytorch[17] (C++ and Python),\nor to our website[18] (HTML, CSS/SCSS, and JavaScript).\n\nThe Stockfish team\n\n[1] https://discord.gg/GWDRS3kU6R\n[2] https://tests.stockfishchess.org/tests/view/66d738ba9de3e7f9b33d159a\n[3] https://tests.stockfishchess.org/tests/view/66d738f39de3e7f9b33d15a0\n[4] https://github.com/official-stockfish/Stockfish/wiki/Useful-data#equivalent-time-odds-and-normalized-game-pair-elo\n[5] https://en.wikipedia.org/wiki/Stockfish_(chess)#Top_Chess_Engine_Championship\n[6] https://en.wikipedia.org/wiki/Stockfish_(chess)#Chess.com_Computer_Chess_Championship\n[7] https://github.com/official-stockfish/Stockfish/pull/5285\n[8] https://chessdb.cn/queryc_en/\n[9] https://encroissant.org/\n[10] https://github.com/rooklift/nibbler\n[11] https://github.com/LeelaChessZero/lc0/releases/tag/v0.31.1\n[12] https://stockfishchess.org/\n[13] https://github.com/official-stockfish/Stockfish/stargazers\n[14] https://github.com/official-stockfish/fishtest/wiki/Running-the-worker\n[15] https://github.com/official-stockfish/Stockfish\n[16] https://github.com/official-stockfish/fishtest\n[17] https://github.com/official-stockfish/nnue-pytorch\n[18] https://github.com/official-stockfish/stockfish-web","shortMessageHtmlLink":"Stockfish 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nn-e8bac1c07a5a.nnue\nA: 6000, alpha: 0.602, gamma: 0.101\nweights: [-127, 127], c_end = 6\nbiases: [-8192, 8192], c_end = 64\n\nAmong the 264 params, 189 weights and all 8 biases were changed.\n\nChanges in the weights:\n- mean: -0.111 +/- 3.57\n- range: [-8, 8]\n\nFound with the same method as:\nhttps://github.com/official-stockfish/Stockfish/pull/5459\n\nDue to the original name (nn-ea8c9128c325.nnue) being too similar\nto the previous main net (nn-e8bac1c07a5a.nnue) and creating confusion,\nit was renamed by making non-functional changes to the .nnue file\nthe same way as past nets with:\nhttps://github.com/linrock/nnue-namer\n\nTo verify that bench is the same and view the modified non-functional bytes:\n```\necho -e \"setoption name EvalFile value nn-ea8c9128c325.nnue\\nbench\" | ./stockfish\necho -e \"setoption name EvalFile value nn-31337bea577c.nnue\\nbench\" | ./stockfish\n\ncmp -l nn-ea8c9128c325.nnue nn-31337bea577c.nnue\n\ndiff <(xxd nn-ea8c9128c325.nnue) <(xxd nn-31337bea577c.nnue)\n```\n\nPassed STC:\nhttps://tests.stockfishchess.org/tests/view/669564154ff211be9d4ec080\nLLR: 2.93 (-2.94,2.94) <0.00,2.00>\nTotal: 57280 W: 15139 L: 14789 D: 27352\nPtnml(0-2): 209, 6685, 14522, 6995, 229\n\nPassed LTC:\nhttps://tests.stockfishchess.org/tests/view/669694204ff211be9d4ec1b4\nLLR: 2.94 (-2.94,2.94) <0.50,2.50>\nTotal: 63030 W: 16093 L: 15720 D: 31217\nPtnml(0-2): 47, 6766, 17516, 7139, 47\n\ncloses https://github.com/official-stockfish/Stockfish/pull/5509\n\nbench 1371485","shortMessageHtmlLink":"Update default main net to 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precise search - because branch seems important.\n\nPassed STC:\nhttps://tests.stockfishchess.org/tests/view/6699d2564ff211be9d4ec488\nLLR: 2.93 (-2.94,2.94) <0.00,2.00>\nTotal: 83104 W: 21789 L: 21401 D: 39914\nPtnml(0-2): 293, 9748, 21128, 10044, 339\n\nPassed LTC:\nhttps://tests.stockfishchess.org/tests/view/669b3f1a4ff211be9d4ec602\nLLR: 2.94 (-2.94,2.94) <0.50,2.50>\nTotal: 136098 W: 34636 L: 34111 D: 67351\nPtnml(0-2): 105, 14882, 37550, 15407, 105\n\ncloses https://github.com/official-stockfish/Stockfish/pull/5512\n\nbench 1526129","shortMessageHtmlLink":"Introduce pre-qsearch ttmove extensions at pv 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193\nhttps://tests.stockfishchess.org/tests/view/668d98a15034141ae5999e68\n\nEarlier version passed STC:\nLLR: 2.94 (-2.94,2.94) <0.00,2.00>\nTotal: 468896 W: 120999 L: 120054 D: 227843\nPtnml(0-2): 1207, 55209, 120639, 56218, 1175\nhttps://tests.stockfishchess.org/tests/view/668b17d2cf91c430fca58630\n\nEarlier version passed LTC:\nLLR: 2.94 (-2.94,2.94) <-1.75,0.25>\nTotal: 550524 W: 139553 L: 139877 D: 271094\nPtnml(0-2): 333, 61646, 151616, 61346, 321\nhttps://tests.stockfishchess.org/tests/view/668b2e04cf91c430fca586b1\n\ncloses https://github.com/official-stockfish/Stockfish/pull/5472\n\nbench 1234309\n\nCo-authored-by: rn5f107s2 <clemens.lerchl@gmail.com>","shortMessageHtmlLink":"removed second killer 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