Simplify Cutnode Reduction

Passed Non-regression STC: LR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 143968 W: 37439 L: 37333 D: 69196 Ptnml(0-2): 521, 17228, 36456, 17182, 597 https://tests.stockfishchess.org/tests/view/66a73f9f4ff211be9d4ed27f Passed Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 198954 W: 50384 L: 50345 D: 98225 Ptnml(0-2): 201, 22360, 54347, 22337, 232 https://tests.stockfishchess.org/tests/view/66a906e94ff211be9d4ed423 closes #5526 bench 1277466
official-stockfish · Aug 3, 2024 · ae9e55c · ae9e55c
1 parent b976f0a
commit ae9e55c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/search.cpp b/src/search.cpp
@@ -1133,7 +1133,7 @@ Value Search::Worker::search(
 
         // Increase reduction for cut nodes (~4 Elo)
         if (cutNode)
-            r += 2 - (ttData.depth >= depth && ss->ttPv) + (!ss->ttPv && move != ttData.move);
+            r += 2 - (ttData.depth >= depth && ss->ttPv) + !ss->ttPv;
 
         // Increase reduction if ttMove is a capture (~3 Elo)
         if (ttCapture)