X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=18e0cb95af9abaa1cb15a03d7ae173fdeb3f87fc;hp=2149df2ba8fe340326ac45be06440f981e7d8826;hb=578b21bbeedc41b6e0d1b2df46887b1636a78e2b;hpb=6c040c821a50475840607ef5f11c270ee21d61da

diff --git a/src/search.cpp b/src/search.cpp
index 2149df2b..18e0cb95 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -960,9 +960,9 @@ moves_loop: // When in check and at SpNode search starts from here
           ss->reduction = reduction<PvNode>(improving, depth, moveCount);
 
           if (   (!PvNode && cutNode)
-              || (  History[pos.piece_on(to_sq(move))][to_sq(move)]
-                  + CounterMovesHistory[pos.piece_on(prevMoveSq)][prevMoveSq]
-                                       [pos.piece_on(to_sq(move))][to_sq(move)] < VALUE_ZERO))
+              || (   History[pos.piece_on(to_sq(move))][to_sq(move)] < VALUE_ZERO
+                  && CounterMovesHistory[pos.piece_on(prevMoveSq)][prevMoveSq]
+                                        [pos.piece_on(to_sq(move))][to_sq(move)] <= VALUE_ZERO))
               ss->reduction += ONE_PLY;
 
           if (move == countermove)