bench: 1045718

bench: 1045718

src/search.cpp

@@ -1840,16 +1840,15 @@ void update_all_stats(const Position&      pos,
 // Updates histories of the move pairs formed by moves
 // at ply -1, -2, -3, -4, and -6 with current move.
 void update_continuation_histories(Stack* ss, Piece pc, Square to, int bonus) {
-    static constexpr std::array<ConthistBonus, 5> conthist_bonuses = {
-      {{1, 1024}, {2, 571}, {3, 339}, {4, 500}, {6, 592}}};
+    bonus = bonus * 50 / 64;
 
-    for (const auto [i, weight] : conthist_bonuses)
+    for (int i : {1, 2, 3, 4, 6})
     {
         // Only update the first 2 continuation histories if we are in check
         if (ss->inCheck && i > 2)
             break;
         if (((ss - i)->currentMove).is_ok())
-            (*(ss - i)->continuationHistory)[pc][to] << bonus * weight / 1024;
+            (*(ss - i)->continuationHistory)[pc][to] << bonus / (1 + (i == 3));
     }
 }