{"payload":{"feedbackUrl":"https://github.com/orgs/community/discussions/53140","repo":{"id":32162758,"defaultBranch":"master","name":"Stockfish","ownerLogin":"VoyagerOne","currentUserCanPush":false,"isFork":true,"isEmpty":false,"createdAt":"2015-03-13T15:09:11.000Z","ownerAvatar":"https://avatars.githubusercontent.com/u/11461916?v=4","public":true,"private":false,"isOrgOwned":false},"refInfo":{"name":"","listCacheKey":"v0:1675870068.371644","currentOid":""},"activityList":{"items":[{"before":"8d3457a9966f8c744ab7f8536be408196ccd8af9","after":"60351b9df901ff5278f208a9cf3a40059ff54832","ref":"refs/heads/master","pushedAt":"2024-09-26T15:06:46.000Z","pushType":"push","commitsCount":752,"pusher":{"login":"VoyagerOne","name":null,"path":"/VoyagerOne","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/11461916?s=80&v=4"},"commit":{"message":"Introduce Various Correction histories\n\nThis patch introduces three additional correction histories, namely,\nMajor Piece Correction History, Minor Piece Correction History, and\nNon-Pawn Correction History.\n\nIntroduced by @mcthouacbb in Sirius\n(https://github.com/mcthouacbb/Sirius) chess engine. 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"}}],"hasNextPage":false,"hasPreviousPage":false,"activityType":"all","actor":null,"timePeriod":"all","sort":"DESC","perPage":30,"startCursor":"Y3Vyc29yOnYyOpK7MjAyNC0wOS0yNlQxNTowNjo0Ni4wMDAwMDBazwAAAATBpV0z","endCursor":"Y3Vyc29yOnYyOpK7MjAyNC0wOS0yNlQxNTowNjo0Ni4wMDAwMDBazwAAAATBpV0z"}},"title":"Activity · VoyagerOne/Stockfish"}