Simplify futility pruning formula

closes #4848 No functional change
official-stockfish · Oct 27, 2023 · 871ab55 · 871ab55
1 parent 0024133
commit 871ab55
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/search.cpp b/src/search.cpp
@@ -775,7 +775,7 @@ Value search(Position& pos, Stack* ss, Value alpha, Value beta, Depth depth, boo
                - (ss - 1)->statScore / 321
              >= beta
         && eval >= beta && eval < 29462  // smaller than TB wins
-        && !(!ttCapture && ttMove))
+        && (!ttMove || ttCapture))
         return eval;
 
     // Step 9. Null move search with verification search (~35 Elo)