Return hash scores on PV nodes.

petur · Nov 24, 2024 · 6da0d4c · 6da0d4c
1 parent 4a1af5e
commit 6da0d4c
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/seawall.cc b/seawall.cc
@@ -3623,6 +3623,8 @@ std::pair<int, Move> Search::search(bool pv, int ply, int depth, int alpha, int
             return {beta, he.best_move};
         if (hv <= alpha && (he.flags & UPPER) && hv > -SCORE_MATE + ply)
             return {alpha, he.best_move};
+        if (depth <= 3 && depth < he.depth && (he.flags & (LOWER | UPPER)) == (LOWER | UPPER) && hv > -SCORE_MATE + ply && hv < SCORE_MATE - ply)
+            return {hv, he.best_move};
     }
     Move prev_best = he.best_move;