From 035cb146d430b601e94c13e3f2fefcc7688ec1d6 Mon Sep 17 00:00:00 2001
From: Shawn Xu <xu107288696@gmail.com>
Date: Thu, 13 Nov 2025 20:30:59 -0800
Subject: [PATCH] Do more futility pruning

closes https://github.com/official-stockfish/Stockfish/pull/6433

Bench: 2469519
---
 src/search.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/search.cpp b/src/search.cpp
index 53ff9f5d9..1c3875cdc 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -857,7 +857,7 @@ Value Search::Worker::search(
     // The depth condition is important for mate finding.
     {
         auto futility_margin = [&](Depth d) {
-            Value futilityMult = 91 - 21 * !ss->ttHit;
+            Value futilityMult = 81 - 21 * !ss->ttHit;
 
             return futilityMult * d                               //
                  - 2094 * improving * futilityMult / 1024         //