diff --git a/src/search.cpp b/src/search.cpp index 6e513b458ff..75a8c963344 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -850,7 +850,7 @@ Value Search::Worker::search( // For cutNodes, if depth is high enough, decrease depth by 2 if there is no ttMove, // or by 1 if there is a ttMove with an upper bound. if (cutNode && depth >= 7 && (!ttData.move || ttData.bound == BOUND_UPPER)) - depth -= 1 + !ttData.move; + depth -= 2; // Step 11. ProbCut (~10 Elo) // If we have a good enough capture (or queen promotion) and a reduced search