From 3a0fff96cf4d7ba8f50f0f86f4d00e254147bfd6 Mon Sep 17 00:00:00 2001
From: Daniel Monroe <github.com@danielmonroe.net>
Date: Fri, 13 Jun 2025 09:52:26 -0700
Subject: [PATCH] Simplify quiet move streak logic

Passed non-regression STC
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 148960 W: 38409 L: 38312 D: 72239
Ptnml(0-2): 372, 17664, 38318, 17747, 379
https://tests.stockfishchess.org/tests/view/684c5773703522d4f129c5f7

Passed non-regression LTC
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 180720 W: 46188 L: 46130 D: 88402
Ptnml(0-2): 84, 19608, 50929, 19644, 95
https://tests.stockfishchess.org/tests/view/68505fa5703522d4f129cbab

closes https://github.com/official-stockfish/Stockfish/pull/6143

Bench: 2055894
---
 src/search.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/search.cpp b/src/search.cpp
index a82b4edf0..cdbc95318 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1206,8 +1206,7 @@ moves_loop:  // When in check, search starts here
         if ((ss + 1)->cutoffCnt > 2)
             r += 1036 + allNode * 848;
 
-        if (!capture && !givesCheck && ss->quietMoveStreak >= 2)
-            r += (ss->quietMoveStreak - 1) * 50;
+        r += (ss + 1)->quietMoveStreak * 50;
 
         // For first picked move (ttMove) reduce reduction
         if (move == ttData.move)