From b325b2c348df02e415b6c78121e0502622d57f34 Mon Sep 17 00:00:00 2001
From: FauziAkram <fauzi.dabat@hotmail.com>
Date: Wed, 16 Oct 2024 13:14:13 +0300
Subject: [PATCH] Simplify bestValue formula

Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 45888 W: 12051 L: 11841 D: 21996
Ptnml(0-2): 123, 5356, 11807, 5504, 154
https://tests.stockfishchess.org/tests/view/670bb89086d5ee47d953c2d8

Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 51336 W: 13021 L: 12830 D: 25485
Ptnml(0-2): 34, 5594, 14227, 5773, 40
https://tests.stockfishchess.org/tests/view/670c587f86d5ee47d953c31b

closes https://github.com/official-stockfish/Stockfish/pull/5637

Bench: 1192999
---
 src/search.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/search.cpp b/src/search.cpp
index 568e147c..c398b7d2 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1551,7 +1551,7 @@ Value Search::Worker::qsearch(Position& pos, Stack* ss, Value alpha, Value beta)
         if (bestValue >= beta)
         {
             if (std::abs(bestValue) < VALUE_TB_WIN_IN_MAX_PLY)
-                bestValue = (3 * bestValue + beta) / 4;
+                bestValue = (bestValue + beta) / 2;
             if (!ss->ttHit)
                 ttWriter.write(posKey, value_to_tt(bestValue, ss->ply), false, BOUND_LOWER,
                                DEPTH_UNSEARCHED, Move::none(), unadjustedStaticEval,