From 20169a43e82fefc2011596f3243be7d8595b4b0c Mon Sep 17 00:00:00 2001
From: Michael Chaly <Vizvezdenec@gmail.com>
Date: Fri, 29 Mar 2024 00:17:37 +0300
Subject: [PATCH] bench 1772608

---
 src/search.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/search.cpp b/src/search.cpp
index e1508a7f06d..6cc804e8a14 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -991,12 +991,18 @@ Value Search::Worker::search(
 
                 lmrDepth += history / 5637;
 
+                Value futilityValue = ss->staticEval + (bestValue < ss->staticEval - 59 ? 141 : 58)
+                           + 125 * lmrDepth;
+
                 // Futility pruning: parent node (~13 Elo)
                 if (!ss->inCheck && lmrDepth < 15
-                    && ss->staticEval + (bestValue < ss->staticEval - 59 ? 141 : 58)
-                           + 125 * lmrDepth
+                    && futilityValue
                          <= alpha)
+                {
+                    if (bestValue <= futilityValue && abs(bestValue) < VALUE_TB_WIN_IN_MAX_PLY && futilityValue < VALUE_TB_WIN_IN_MAX_PLY)
+                        bestValue = (bestValue + futilityValue * 3) / 4;
                     continue;
+                }
 
                 lmrDepth = std::max(lmrDepth, 0);