From 1e9b092cbac1aed8261a7f656a114f5953b6f5c0 Mon Sep 17 00:00:00 2001
From: Terje <tkirstihagen@gmail.com>
Date: Fri, 3 Jan 2025 18:10:26 +0100
Subject: [PATCH] Bench: 26100887

---
 src/history.h | 5 -----
 src/threads.c | 1 -
 src/threads.h | 1 -
 3 files changed, 7 deletions(-)

diff --git a/src/history.h b/src/history.h
index c4cda740..2173ab60 100644
--- a/src/history.h
+++ b/src/history.h
@@ -31,7 +31,6 @@
 #define NoisyEntry(move)        (&thread->captureHistory[piece(move)][toSq(move)][PieceTypeOf(capturing(move))])
 #define ContEntry(offset, move) (&(*(ss-offset)->continuation)[piece(move)][toSq(move)])
 #define PawnCorrEntry()         (&thread->pawnCorrHistory[thread->pos.stm][PawnCorrIndex(&thread->pos)])
-#define MatCorrEntry()          (&thread->matCorrHistory[thread->pos.stm][MatCorrIndex(&thread->pos)])
 #define MinorCorrEntry()        (&thread->minorCorrHistory[thread->pos.stm][MinorCorrIndex(&thread->pos)])
 #define MajorCorrEntry()        (&thread->majorCorrHistory[thread->pos.stm][MajorCorrIndex(&thread->pos)])
 #define ContCorrEntry(offset)   (&(*(ss-offset)->contCorr)[piece((ss-1)->move)][toSq((ss-1)->move)])
@@ -42,7 +41,6 @@
 #define NoisyHistoryUpdate(move, bonus)        (HistoryBonus(NoisyEntry(move),        bonus, 16000))
 #define ContHistoryUpdate(offset, move, bonus) (HistoryBonus(ContEntry(offset, move), bonus, 21250))
 #define PawnCorrHistoryUpdate(bonus)           (HistoryBonus(PawnCorrEntry(),         bonus,  1662))
-#define MatCorrHistoryUpdate(bonus)            (HistoryBonus(MatCorrEntry(),          bonus,  1077))
 #define MinorCorrHistoryUpdate(bonus)          (HistoryBonus(MinorCorrEntry(),        bonus,  1024))
 #define MajorCorrHistoryUpdate(bonus)          (HistoryBonus(MajorCorrEntry(),        bonus,  1024))
 #define ContCorrHistoryUpdate(offset, bonus)   (HistoryBonus(ContCorrEntry(offset),   bonus,  1220))
@@ -51,7 +49,6 @@
 
 INLINE int PawnStructure(const Position *pos) { return pos->pawnKey & (PAWN_HISTORY_SIZE - 1); }
 INLINE int PawnCorrIndex(const Position *pos) { return pos->pawnKey & (CORRECTION_HISTORY_SIZE - 1); }
-INLINE int MatCorrIndex(const Position *pos) { return pos->materialKey & (CORRECTION_HISTORY_SIZE - 1); }
 INLINE int MinorCorrIndex(const Position *pos) { return pos->minorKey & (CORRECTION_HISTORY_SIZE - 1); }
 INLINE int MajorCorrIndex(const Position *pos) { return pos->majorKey & (CORRECTION_HISTORY_SIZE - 1); }
 INLINE int NonPawnCorrIndex(const Position *pos, Color c) { return pos->nonPawnKey[c] & (CORRECTION_HISTORY_SIZE - 1); }
@@ -127,7 +124,6 @@ INLINE void UpdateHistory(Thread *thread, Stack *ss, Move bestMove, Depth depth,
 INLINE void UpdateCorrectionHistory(Thread *thread, Stack *ss, int bestScore, int eval, Depth depth) {
     int bonus = CorrectionBonus(bestScore, eval, depth);
     PawnCorrHistoryUpdate(bonus);
-    MatCorrHistoryUpdate(bonus);
     MinorCorrHistoryUpdate(bonus);
     MajorCorrHistoryUpdate(bonus);
     NonPawnCorrHistoryUpdate(bonus, WHITE);
@@ -158,7 +154,6 @@ INLINE int GetHistory(const Thread *thread, Stack *ss, Move move) {
 
 INLINE int GetCorrectionHistory(const Thread *thread, const Stack *ss) {
     int c =  6554 * *PawnCorrEntry()
-           + 4520 * *MatCorrEntry()
            + 6800 * *MinorCorrEntry()
            + 3700 * *MajorCorrEntry()
            + 7000 * (*NonPawnCorrEntry(WHITE) + *NonPawnCorrEntry(BLACK))
diff --git a/src/threads.c b/src/threads.c
index 65bc064f..ad048798 100644
--- a/src/threads.c
+++ b/src/threads.c
@@ -145,7 +145,6 @@ void ResetThreads() {
         memset(Threads[i].captureHistory,  0, sizeof(Threads[i].captureHistory)),
         memset(Threads[i].continuation,    0, sizeof(Threads[i].continuation)),
         memset(Threads[i].pawnCorrHistory, 0, sizeof(Threads[i].pawnCorrHistory)),
-        memset(Threads[i].matCorrHistory,  0, sizeof(Threads[i].matCorrHistory)),
         memset(Threads[i].minorCorrHistory,0, sizeof(Threads[i].minorCorrHistory)),
         memset(Threads[i].majorCorrHistory,0, sizeof(Threads[i].majorCorrHistory)),
         memset(Threads[i].contCorrHistory, 0, sizeof(Threads[i].contCorrHistory));
diff --git a/src/threads.h b/src/threads.h
index ad83c732..f9c86654 100644
--- a/src/threads.h
+++ b/src/threads.h
@@ -79,7 +79,6 @@ typedef struct Thread {
     CaptureToHistory captureHistory;
     ContinuationHistory continuation[2][2];
     CorrectionHistory pawnCorrHistory;
-    CorrectionHistory matCorrHistory;
     CorrectionHistory minorCorrHistory;
     CorrectionHistory majorCorrHistory;
     CorrectionHistory nonPawnCorrHistory[COLOR_NB];