X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=6c9060191964bd219b1119bc29e09f63e5fe4ce6;hp=3382e09c745183130458ca1db03506fa3345b71e;hb=b45936a8c781083ada45dc5b503a5ea27d4cf059;hpb=630fda2e2cfd44ccf33c2c66ec30842fbca9a4f3 diff --git a/src/search.cpp b/src/search.cpp index 3382e09c..6c906019 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -271,6 +271,9 @@ namespace { int NodesSincePoll; int NodesBetweenPolls = 30000; + // History table + History H; + /// Functions @@ -289,10 +292,10 @@ namespace { bool move_is_killer(Move m, const SearchStack& ss); Depth extension(const Position& pos, Move m, bool pvNode, bool capture, bool check, bool singleReply, bool mateThreat, bool* dangerous); bool ok_to_do_nullmove(const Position& pos); - bool ok_to_prune(const Position& pos, Move m, Move threat, Depth d, const History& H); + bool ok_to_prune(const Position& pos, Move m, Move threat, Depth d); bool ok_to_use_TT(const TTEntry* tte, Depth depth, Value beta, int ply); bool ok_to_history(const Position& pos, Move m); - void update_history(const Position& pos, Move m, Depth depth, History& H, Move movesSearched[], int moveCount); + void update_history(const Position& pos, Move m, Depth depth, Move movesSearched[], int moveCount); void update_killers(Move m, SearchStack& ss); bool fail_high_ply_1(); @@ -629,9 +632,7 @@ namespace { // Initialize TT.new_search(); - for (int i = 0; i < THREAD_MAX; i++) - Threads[i].H.clear(); - + H.clear(); for (int i = 0; i < 3; i++) { ss[i].init(i); @@ -657,7 +658,7 @@ namespace { // Calculate dynamic search window based on previous iterations Value alpha, beta; - if (MultiPV == 1 && Iteration >= 6) + if (MultiPV == 1 && Iteration >= 6 && abs(IterationInfo[Iteration - 1].value) < VALUE_KNOWN_WIN) { int prevDelta1 = IterationInfo[Iteration - 1].speculatedValue - IterationInfo[Iteration - 2].speculatedValue; int prevDelta2 = IterationInfo[Iteration - 2].speculatedValue - IterationInfo[Iteration - 3].speculatedValue; @@ -1043,7 +1044,7 @@ namespace { // Initialize a MovePicker object for the current position, and prepare // to search all moves - MovePicker mp = MovePicker(pos, ttMove, depth, Threads[threadID].H, &ss[ply]); + MovePicker mp = MovePicker(pos, ttMove, depth, H, &ss[ply]); Move move, movesSearched[256]; int moveCount = 0; @@ -1086,7 +1087,7 @@ namespace { && moveCount >= LMRPVMoves && !dangerous && !moveIsCapture - && !move_promotion(move) + && !move_is_promotion(move) && !move_is_castle(move) && !move_is_killer(move, ss[ply])) { @@ -1172,7 +1173,7 @@ namespace { Move m = ss[ply].pv[ply]; if (ok_to_history(pos, m)) // Only non capture moves are considered { - update_history(pos, m, depth, Threads[threadID].H, movesSearched, moveCount); + update_history(pos, m, depth, movesSearched, moveCount); update_killers(m, ss[ply]); } TT.store(pos.get_key(), value_to_tt(bestValue, ply), VALUE_TYPE_LOWER, depth, m); @@ -1304,7 +1305,7 @@ namespace { // Initialize a MovePicker object for the current position, and prepare // to search all moves. - MovePicker mp = MovePicker(pos, ttMove, depth, Threads[threadID].H, &ss[ply]); + MovePicker mp = MovePicker(pos, ttMove, depth, H, &ss[ply]); Move move, movesSearched[256]; int moveCount = 0; @@ -1337,11 +1338,11 @@ namespace { if ( useFutilityPruning && !dangerous && !moveIsCapture - && !move_promotion(move)) + && !move_is_promotion(move)) { // History pruning. See ok_to_prune() definition if ( moveCount >= 2 + int(depth) - && ok_to_prune(pos, move, ss[ply].threatMove, depth, Threads[threadID].H)) + && ok_to_prune(pos, move, ss[ply].threatMove, depth)) continue; // Value based pruning @@ -1370,7 +1371,7 @@ namespace { && moveCount >= LMRNonPVMoves && !dangerous && !moveIsCapture - && !move_promotion(move) + && !move_is_promotion(move) && !move_is_castle(move) && !move_is_killer(move, ss[ply])) { @@ -1431,7 +1432,7 @@ namespace { Move m = ss[ply].pv[ply]; if (ok_to_history(pos, m)) // Only non capture moves are considered { - update_history(pos, m, depth, Threads[threadID].H, movesSearched, moveCount); + update_history(pos, m, depth, movesSearched, moveCount); update_killers(m, ss[ply]); } TT.store(pos.get_key(), value_to_tt(bestValue, ply), VALUE_TYPE_LOWER, depth, m); @@ -1524,7 +1525,7 @@ namespace { // Initialize a MovePicker object for the current position, and prepare // to search the moves. Because the depth is <= 0 here, only captures, // queen promotions and checks (only if depth == 0) will be generated. - MovePicker mp = MovePicker(pos, ttMove, depth, Threads[threadID].H); + MovePicker mp = MovePicker(pos, ttMove, depth, H); Move move; int moveCount = 0; Bitboard dcCandidates = mp.discovered_check_candidates(); @@ -1545,7 +1546,7 @@ namespace { if ( enoughMaterial && !isCheck && !pvNode - && !move_promotion(move) + && !move_is_promotion(move) && !pos.move_is_check(move, dcCandidates) && !pos.move_is_passed_pawn_push(move)) { @@ -1566,7 +1567,7 @@ namespace { // Don't search captures and checks with negative SEE values if ( !isCheck - && !move_promotion(move) + && !move_is_promotion(move) && (pos.midgame_value_of_piece_on(move_from(move)) > pos.midgame_value_of_piece_on(move_to(move))) && pos.see(move) < 0) @@ -1663,9 +1664,9 @@ namespace { if ( useFutilityPruning && !dangerous && !moveIsCapture - && !move_promotion(move) + && !move_is_promotion(move) && moveCount >= 2 + int(sp->depth) - && ok_to_prune(pos, move, ss[sp->ply].threatMove, sp->depth, Threads[threadID].H)) + && ok_to_prune(pos, move, ss[sp->ply].threatMove, sp->depth)) continue; // Make and search the move. @@ -1677,7 +1678,7 @@ namespace { if ( !dangerous && moveCount >= LMRNonPVMoves && !moveIsCapture - && !move_promotion(move) + && !move_is_promotion(move) && !move_is_castle(move) && !move_is_killer(move, ss[sp->ply])) { @@ -1780,7 +1781,7 @@ namespace { if ( !dangerous && moveCount >= LMRPVMoves && !moveIsCapture - && !move_promotion(move) + && !move_is_promotion(move) && !move_is_castle(move) && !move_is_killer(move, ss[sp->ply])) { @@ -2236,7 +2237,7 @@ namespace { && pos.type_of_piece_on(move_to(m)) != PAWN && ( pos.non_pawn_material(WHITE) + pos.non_pawn_material(BLACK) - pos.midgame_value_of_piece_on(move_to(m)) == Value(0)) - && !move_promotion(m) + && !move_is_promotion(m) && !move_is_ep(m)) { result += PawnEndgameExtension[pvNode]; @@ -2274,11 +2275,11 @@ namespace { // non-tactical moves late in the move list close to the leaves are // candidates for pruning. - bool ok_to_prune(const Position& pos, Move m, Move threat, Depth d, const History& H) { + bool ok_to_prune(const Position& pos, Move m, Move threat, Depth d) { assert(move_is_ok(m)); assert(threat == MOVE_NONE || move_is_ok(threat)); - assert(!move_promotion(m)); + assert(!move_is_promotion(m)); assert(!pos.move_is_check(m)); assert(!pos.move_is_capture(m)); assert(!pos.move_is_passed_pawn_push(m)); @@ -2347,14 +2348,14 @@ namespace { bool ok_to_history(const Position& pos, Move m) { - return !pos.move_is_capture(m) && !move_promotion(m); + return !pos.move_is_capture(m) && !move_is_promotion(m); } // update_history() registers a good move that produced a beta-cutoff // in history and marks as failures all the other moves of that ply. - void update_history(const Position& pos, Move m, Depth depth, History& H, + void update_history(const Position& pos, Move m, Depth depth, Move movesSearched[], int moveCount) { H.success(pos.piece_on(move_from(m)), move_to(m), depth);