diff --git a/src/search.cpp b/src/search.cpp index 218d1ce4..c03a30f5 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -791,7 +791,7 @@ Value Search::Worker::search( return beta + (eval - beta) / 3; // Step 9. Null move search with verification search (~35 Elo) - if (!PvNode && (ss - 1)->currentMove != Move::null() && (ss - 1)->statScore < 14389 + if (cutNode && (ss - 1)->currentMove != Move::null() && (ss - 1)->statScore < 14389 && eval >= beta && ss->staticEval >= beta - 21 * depth + 390 && !excludedMove && pos.non_pawn_material(us) && ss->ply >= thisThread->nmpMinPly && beta > VALUE_TB_LOSS_IN_MAX_PLY) @@ -806,7 +806,7 @@ Value Search::Worker::search( pos.do_null_move(st, tt); - Value nullValue = -search(pos, ss + 1, -beta, -beta + 1, depth - R, !cutNode); + Value nullValue = -search(pos, ss + 1, -beta, -beta + 1, depth - R, false); pos.undo_null_move();