From 871ab55f01f844bd24ed768c5e734ed2c956ef78 Mon Sep 17 00:00:00 2001
From: Taras Vuk <117687515+TarasVuk@users.noreply.github.com>
Date: Wed, 25 Oct 2023 16:00:58 +0200
Subject: [PATCH] Simplify futility pruning formula

closes https://github.com/official-stockfish/Stockfish/pull/4848

No functional change
---
 src/search.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/search.cpp b/src/search.cpp
index 9cef7e5f..24f0d994 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -775,7 +775,7 @@ Value search(Position& pos, Stack* ss, Value alpha, Value beta, Depth depth, boo
                - (ss - 1)->statScore / 321
              >= beta
         && eval >= beta && eval < 29462  // smaller than TB wins
-        && !(!ttCapture && ttMove))
+        && (!ttMove || ttCapture))
         return eval;
 
     // Step 9. Null move search with verification search (~35 Elo)
-- 
2.39.2