harder futility pruning if corrhist large

bench 1294909
official-stockfish · Dec 27, 2024 · 5e0887d · 5e0887d
1 parent f656fdf
commit 5e0887d
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/search.cpp b/src/search.cpp
@@ -787,6 +787,7 @@ Value Search::Worker::search(
     if (!ss->ttPv && depth < 14
         && eval - futility_margin(depth, cutNode && !ss->ttHit, improving, opponentWorsening)
                - (ss - 1)->statScore / 290
+               + (ss->staticEval == eval) * (40 - std::abs(correctionValue) / 131072)
              >= beta
         && eval >= beta && (!ttData.move || ttCapture) && !is_loss(beta) && !is_win(eval))
         return beta + (eval - beta) / 3;