Give RH its own cap

Bench: 4893421
PGG106 · Sep 20, 2024 · 54c499e · 54c499e
1 parent 24a2484
commit 54c499e
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Showing 2 changed files with 3 additions and 2 deletions.
diff --git a/src/history.cpp b/src/history.cpp
@@ -23,8 +23,8 @@ void updateHHScore(const Position* pos, SearchData* sd, const Move move, int bon
 }
 
 void updateRHScore(const Position *pos, SearchData *sd, const Move move, int bonus) {
-    // Scale bonus to fix it in a [-HH_MAX;HH_MAX] range
-    const int scaledBonus = bonus - GetRHScore(pos, sd, move) * std::abs(bonus) / HH_MAX;
+    // Scale bonus to fix it in a [-RH_MAX;RH_MAX] range
+    const int scaledBonus = bonus - GetRHScore(pos, sd, move) * std::abs(bonus) / RH_MAX;
     // Update move score
     sd->rootHistory[pos->side][FromTo(move)] += scaledBonus;
 }

diff --git a/src/history.h b/src/history.h
@@ -8,6 +8,7 @@ struct SearchStack;
 struct MoveList;
 
 constexpr int HH_MAX = 8192;
+constexpr int RH_MAX = 8192;
 constexpr int CH_MAX = 16384;
 constexpr int CAPTHIST_MAX = 16384;
 constexpr int CORRHIST_WEIGHT_SCALE = 1024;