From aacee91a5a295f1d9de2ea6dc0ca4a48e934e3b6 Mon Sep 17 00:00:00 2001 From: VoyagerOne Date: Mon, 14 May 2018 06:52:16 +0200 Subject: [PATCH] Update search.cpp At PvNodes allow bonus for prior counter move that caused a fail low for depth 1 and 2. Note : I did a speculative LTC on yellow STC patch since history stats tend to be highly TC sensitive STC (Yellow): LLR: -2.96 (-2.94,2.94) [0.00,5.00] Total: 64295 W: 13042 L: 12873 D: 38380 http://tests.stockfishchess.org/tests/view/5af507c80ebc5968e6524153 LTC: LLR: 2.96 (-2.94,2.94) [0.00,5.00] Total: 22407 W: 3413 L: 3211 D: 15783 http://tests.stockfishchess.org/tests/view/5af85dd40ebc591fdf408b87 Also use local variable excludedMove in NMP (marotear) Bench: 5294316 --- src/search.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/search.cpp b/src/search.cpp index a4b2ef34..1a4f654d 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -737,7 +737,7 @@ namespace { && (ss-1)->statScore < 22500 && eval >= beta && ss->staticEval >= beta - 36 * depth / ONE_PLY + 225 - && !ss->excludedMove + && !excludedMove && pos.non_pawn_material(pos.side_to_move()) && (ss->ply >= thisThread->nmp_ply || ss->ply % 2 != thisThread->nmp_odd)) { @@ -1153,7 +1153,7 @@ moves_loop: // When in check, search starts from here update_continuation_histories(ss-1, pos.piece_on(prevSq), prevSq, -stat_bonus(depth + ONE_PLY)); } // Bonus for prior countermove that caused the fail low - else if ( depth >= 3 * ONE_PLY + else if ( (depth >= 3 * ONE_PLY || PvNode) && !pos.captured_piece() && is_ok((ss-1)->currentMove)) update_continuation_histories(ss-1, pos.piece_on(prevSq), prevSq, stat_bonus(depth)); -- 2.39.2