diff --git a/src/search.cpp b/src/search.cpp index 9919b0cc..f682da3a 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -913,10 +913,11 @@ moves_loop: // When in check, search starts from here // Multi-cut pruning // Our ttMove is assumed to fail high, and now we failed high also on a reduced // search without the ttMove. So we assume this expected Cut-node is not singular, - // that is multiple moves fail high, and we can prune the whole subtree by returning - // the hard beta bound. - else if (cutNode && singularBeta > beta) - return beta; + // that multiple moves fail high, and we can prune the whole subtree by returning + // a soft bound. + else if ( eval >= beta + && singularBeta >= beta) + return singularBeta; } // Check extension (~2 Elo)