diff --git a/src/search.cpp b/src/search.cpp index 4572ffc900d..037b0b6e9fc 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -775,8 +775,12 @@ Value Search::Worker::search( - (ss - 1)->statScore / 254 >= beta && eval >= beta && eval < VALUE_TB_WIN_IN_MAX_PLY && (!ttMove || ttCapture)) + { + if (prevSq != SQ_NONE && (ss - 1)->moveCount <= 2 && !priorCapture) + update_continuation_histories(ss - 1, pos.piece_on(prevSq), prevSq, + -stat_malus(depth + 1)); return beta > VALUE_TB_LOSS_IN_MAX_PLY ? (eval + beta) / 2 : eval; - + } // Step 9. Null move search with verification search (~35 Elo) if (!PvNode && (ss - 1)->currentMove != Move::null() && (ss - 1)->statScore < 16993 && eval >= beta && ss->staticEval >= beta - 19 * depth + 326 && !excludedMove