From 2659351ce7c01b02528b6cf6c3553c571ccce962 Mon Sep 17 00:00:00 2001 From: Daniel Samek Date: Mon, 18 Aug 2025 06:33:51 +0200 Subject: [PATCH] Remove depth reduction in the full-depth search Passed simplification STC: LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 217184 W: 56218 L: 56195 D: 104771 Ptnml(0-2): 627, 25673, 55985, 25664, 643 https://tests.stockfishchess.org/tests/view/68a21e0eb6fb3300203bbcf3 Passed simplification LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 30474 W: 7923 L: 7713 D: 14838 Ptnml(0-2): 20, 3205, 8569, 3431, 12 https://tests.stockfishchess.org/tests/view/68a2adacb6fb3300203bc3f9 closes https://github.com/official-stockfish/Stockfish/pull/6246 bench 2626263 --- src/search.cpp | 3 --- 1 file changed, 3 deletions(-) diff --git a/src/search.cpp b/src/search.cpp index f5fad184a..47409b3a8 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -1252,9 +1252,6 @@ moves_loop: // When in check, search starts here if (!ttData.move) r += 1118; - if (depth < 5) - r += 1080; - // Note that if expected reduction is high, we reduce search depth here value = -search(pos, ss + 1, -(alpha + 1), -alpha, newDepth - (r > 3212) - (r > 4784 && newDepth > 2), !cutNode);