diff --git a/src/search.cpp b/src/search.cpp index 092a4915..7e3f6ca5 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -632,7 +632,7 @@ namespace { } // Step 7. Futility pruning: child node (skipped when in check) - if ( !PvNode + if ( !RootNode && depth < 7 * ONE_PLY && eval - futility_margin(depth) >= beta && eval < VALUE_KNOWN_WIN // Do not return unproven wins @@ -829,9 +829,8 @@ moves_loop: // When in check and at SpNode search starts from here // Update the current move (this must be done after singular extension search) newDepth = depth - ONE_PLY + extension; - // Step 13. Pruning at shallow depth (exclude PV nodes) - if ( !PvNode - && !captureOrPromotion + // Step 13. Pruning at shallow depth + if ( !captureOrPromotion && !inCheck && !dangerous && bestValue > VALUE_MATED_IN_MAX_PLY)