From: Shahin M. Shahin <41402573+peregrineshahin@users.noreply.github.com>
Date: Sat, 14 Oct 2023 15:08:51 +0000 (+0300)
Subject: Cleanup qsearch continuation histories
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=057046cc9a114e38d9f616fa58cf230e9b15b9a7

Cleanup qsearch continuation histories

Only (ss-1) and (ss-2) are used in qsearch.

closes https://github.com/official-stockfish/Stockfish/pull/4828

No functional change
---

diff --git a/src/search.cpp b/src/search.cpp
index 16c6b0f3..0ebf4e20 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1506,9 +1506,7 @@ moves_loop: // When in check, search starts here
         futilityBase = std::min(ss->staticEval, bestValue) + 200;
     }
 
-    const PieceToHistory* contHist[] = { (ss-1)->continuationHistory, (ss-2)->continuationHistory,
-                                         (ss-3)->continuationHistory, (ss-4)->continuationHistory,
-                                          nullptr                   , (ss-6)->continuationHistory };
+    const PieceToHistory* contHist[] = {(ss-1)->continuationHistory, (ss-2)->continuationHistory};
 
     // Initialize a MovePicker object for the current position, and prepare
     // to search the moves. Because the depth is <= 0 here, only captures,