From 924d29d3cab85f45a877a5da0eeeb73a52cb4b62 Mon Sep 17 00:00:00 2001
From: FauziAkram <fauzi.dabat@hotmail.com>
Date: Fri, 10 Jul 2026 20:19:33 +0200
Subject: [PATCH] Simplify Reduction formula for first picked move (ttMove)

Passed STC non-reg:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 124864 W: 32270 L: 32151 D: 60443
Ptnml(0-2): 273, 13766, 34278, 13799, 316
https://tests.stockfishchess.org/tests/view/6a44f4d9f97ff95f78795463

Passed LTC non-reg:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 335544 W: 87272 L: 87369 D: 160903
Ptnml(0-2): 157, 34355, 98852, 34244, 164
https://tests.stockfishchess.org/tests/view/6a46a188f97ff95f787956a1

closes https://github.com/official-stockfish/Stockfish/pull/6964

Bench: 2890786
---
 src/search.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/search.cpp b/src/search.cpp
index 710e61c94..3ccb4895a 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1312,7 +1312,7 @@ moves_loop:  // When in check, search starts here
 
         // For first picked move (ttMove) reduce reduction
         else if (move == ttData.move)
-            r = std::max(0, r - 2016);
+            r -= 2016;
 
         if (capture)
             ss->statScore = 809 * int(PieceValue[pos.captured_piece()]) / 128