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Bench: 9023566
SzilBalazs · Sep 2, 2023 · cd8bdd0 · cd8bdd0
1 parent cd47d12
commit cd8bdd0
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Showing 3 changed files with 3 additions and 3 deletions.
diff --git a/src/search/history.h b/src/search/history.h
@@ -71,7 +71,7 @@ namespace search {
         Score get_history(chess::Move move, SearchStack *ss) const {
             Score value = butterfly[move.get_from()][move.get_to()];
             if ((ss - 1)->move.is_ok()) {
-                value += 3 * conthist[(ss - 1)->pt][(ss - 1)->move.get_to()][move.get_from()][move.get_to()];
+                value += 2 * conthist[(ss - 1)->pt][(ss - 1)->move.get_to()][move.get_from()][move.get_to()];
             }
             return value;
         }

diff --git a/src/search/move_list.h b/src/search/move_list.h
@@ -105,7 +105,7 @@ namespace search {
             } else if (move == history.counter_moves[last_move.get_from()][last_move.get_to()]) {
                 return MOVE_SCORE_COUNTER;
             } else {
-                return history.get_history(move, ss);
+                return history.butterfly[move.get_from()][move.get_to()];
             }
         }
     };

diff --git a/src/search/search_thread.h b/src/search/search_thread.h
@@ -400,7 +400,7 @@ namespace search {
 
                     R -= pv_node;
                     R += !improving;
-                    R -= std::clamp(history.butterfly[move.get_from()][move.get_to()] / 4096, -2, 2);
+                    R -= std::clamp(history.get_history(move, ss) / 4096, -2, 2);
 
                     Depth D = std::clamp(new_depth - R, 1, depth - 1);
                     score = -search<NON_PV_NODE>(D, -alpha - 1, -alpha, ss + 1);