From 1cb9afbdc04fbb864ee48babe56c1e88867d11e9 Mon Sep 17 00:00:00 2001 From: Stefan Geschwentner Date: Sat, 28 Oct 2023 07:43:12 +0200 Subject: [PATCH] Remove razoring history update. The recently commit 'Rewarding Quiet Moves that Enable Razoring' add a history update if razoring. But its contains also many tuned values all over the search. Following tests shows that the tuned values and not the added history update is responsible for the elo gain. So remove later. Passed STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 29376 W: 7641 L: 7410 D: 14325 Ptnml(0-2): 100, 3411, 7451, 3610, 116 https://tests.stockfishchess.org/tests/view/653c9fe1cc309ae839562070 Passed LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 242922 W: 59879 L: 59885 D: 123158 Ptnml(0-2): 129, 27764, 65688, 27744, 136 https://tests.stockfishchess.org/tests/view/653d06cbcc309ae839562735 closes https://github.com/official-stockfish/Stockfish/pull/4858 Bench: 1286104 --- src/search.cpp | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/src/search.cpp b/src/search.cpp index 3cd3b555..aaf545d2 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -764,18 +764,7 @@ Value search(Position& pos, Stack* ss, Value alpha, Value beta, Depth depth, boo { value = qsearch(pos, ss, alpha - 1, alpha); if (value < alpha) - { - if (!priorCapture && prevSq != SQ_NONE) - { - int bonus = (depth > 6) + (PvNode || cutNode) + (value < alpha - 658) - + ((ss - 1)->moveCount > 11); - update_continuation_histories(ss - 1, pos.piece_on(prevSq), prevSq, - stat_bonus(depth) * bonus); - thisThread->mainHistory[~us][from_to((ss - 1)->currentMove)] - << stat_bonus(depth) * bonus / 2; - } return value; - } } // Step 8. Futility pruning: child node (~40 Elo) -- 2.39.2