From 4d4c6ebd0255f29a45fb5e071fc7471ab0adf316 Mon Sep 17 00:00:00 2001
From: FauziAkram <fauzi.dabat@hotmail.com>
Date: Tue, 23 Dec 2025 21:29:16 +0100
Subject: [PATCH] Simplify doDeeperSearch formula

Passed STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 211776 W: 54939 L: 54911 D: 101926
Ptnml(0-2): 714, 24971, 54484, 25011, 708
https://tests.stockfishchess.org/tests/view/6938971875b70713ef796b70

Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 216774 W: 55346 L: 55326 D: 106102
Ptnml(0-2): 105, 23599, 60980, 23577, 126
https://tests.stockfishchess.org/tests/view/693fc91f46f342e1ec20f9f6

closes https://github.com/official-stockfish/Stockfish/pull/6486

Bench: 3267755
---
 src/search.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/search.cpp b/src/search.cpp
index 377b96343..9c52592e0 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1241,7 +1241,7 @@ moves_loop:  // When in check, search starts here
             {
                 // Adjust full-depth search based on LMR results - if the result was
                 // good enough search deeper, if it was bad enough search shallower.
-                const bool doDeeperSearch = d < newDepth && value > (bestValue + 43 + 2 * newDepth);
+                const bool doDeeperSearch    = d < newDepth && value > (bestValue + newDepth + 44);
                 const bool doShallowerSearch = value < bestValue + 9;
 
                 newDepth += doDeeperSearch - doShallowerSearch;