X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=06cc9b60fc97155cf6687422ad5d2b8b2de1eb5b;hp=15757c3a9ae7c025cc02f5c616380cc00976fc29;hb=24cc3a97a480afdd5587ab9b2d75c1426acc3133;hpb=2fff532f4e80c8e2e61d8b3955447f13124d40f0 diff --git a/src/search.cpp b/src/search.cpp index 15757c3a..06cc9b60 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -190,9 +190,6 @@ namespace { // Remaining depth: 1 ply 1.5 ply 2 ply 2.5 ply 3 ply 3.5 ply const Value RazorApprMargins[6] = { Value(0x520), Value(0x300), Value(0x300), Value(0x300), Value(0x300), Value(0x300) }; - // The main transposition table - TranspositionTable TT; - /// Variables initialized by UCI options @@ -894,7 +891,7 @@ namespace { // Decide search depth for this move bool moveIsCapture = pos.move_is_capture(move); bool dangerous; - ext = extension(pos, move, true, pos.move_is_capture(move), pos.move_is_check(move), false, false, &dangerous); + ext = extension(pos, move, true, moveIsCapture, pos.move_is_check(move), false, false, &dangerous); newDepth = (Iteration - 2) * OnePly + ext + InitialDepth; // Make the move, and search it @@ -918,8 +915,8 @@ namespace { } else { - if (newDepth >= 3*OnePly - && i + MultiPV >= LMRPVMoves + if ( newDepth >= 3*OnePly + && i >= MultiPV + LMRPVMoves && !dangerous && !moveIsCapture && !move_is_promotion(move) @@ -927,10 +924,10 @@ namespace { { ss[0].reduction = OnePly; value = -search(pos, ss, -alpha, newDepth-OnePly, 1, true, 0); - } - else + } else value = alpha + 1; // Just to trigger next condition - if(value > alpha) + + if (value > alpha) { value = -search(pos, ss, -alpha, newDepth, 1, true, 0); if (value > alpha) @@ -989,6 +986,8 @@ namespace { // Print search information to the standard output std::cout << "info depth " << Iteration << " score " << value_to_string(value) + << ((value >= beta)? + " lowerbound" : ((value <= alpha)? " upperbound" : "")) << " time " << current_search_time() << " nodes " << nodes_searched() << " nps " << nps() @@ -1092,16 +1091,16 @@ namespace { // Initialize a MovePicker object for the current position, and prepare // to search all moves - MovePicker mp = MovePicker(pos, ttMove, depth, H, &ss[ply]); - Move move, movesSearched[256]; int moveCount = 0; Value value, bestValue = -VALUE_INFINITE; - Bitboard dcCandidates = mp.discovered_check_candidates(); Color us = pos.side_to_move(); bool isCheck = pos.is_check(); bool mateThreat = pos.has_mate_threat(opposite_color(us)); + MovePicker mp = MovePicker(pos, ttMove, depth, H, &ss[ply]); + Bitboard dcCandidates = mp.discovered_check_candidates(); + // Loop through all legal moves until no moves remain or a beta cutoff // occurs. while ( alpha < beta @@ -1110,7 +1109,7 @@ namespace { { assert(move_is_ok(move)); - bool singleReply = (isCheck && mp.number_of_moves() == 1); + bool singleReply = (isCheck && mp.number_of_evasions() == 1); bool moveIsCheck = pos.move_is_check(move, dcCandidates); bool moveIsCapture = pos.move_is_capture(move); @@ -1367,7 +1366,7 @@ namespace { { assert(move_is_ok(move)); - bool singleReply = (isCheck && mp.number_of_moves() == 1); + bool singleReply = (isCheck && mp.number_of_evasions() == 1); bool moveIsCheck = pos.move_is_check(move, dcCandidates); bool moveIsCapture = pos.move_is_capture(move); @@ -1541,10 +1540,10 @@ namespace { // Use the cached evaluation score if possible assert(ei.futilityMargin == Value(0)); - staticValue = tte->value(); + staticValue = tte->value() + 7; } else - staticValue = evaluate(pos, ei, threadID); + staticValue = evaluate(pos, ei, threadID) + 7; if (ply == PLY_MAX - 1) return evaluate(pos, ei, threadID); @@ -1963,15 +1962,15 @@ namespace { bool includeAllMoves = (searchMoves[0] == MOVE_NONE); // Generate all legal moves - int lm_count = generate_legal_moves(pos, mlist); + MoveStack* last = generate_legal_moves(pos, mlist); // Add each move to the moves[] array - for (int i = 0; i < lm_count; i++) + for (MoveStack* cur = mlist; cur != last; cur++) { bool includeMove = includeAllMoves; for (int k = 0; !includeMove && searchMoves[k] != MOVE_NONE; k++) - includeMove = (searchMoves[k] == mlist[i].move); + includeMove = (searchMoves[k] == cur->move); if (!includeMove) continue; @@ -1980,7 +1979,7 @@ namespace { StateInfo st; SearchStack ss[PLY_MAX_PLUS_2]; - moves[count].move = mlist[i].move; + moves[count].move = cur->move; pos.do_move(moves[count].move, st); moves[count].score = -qsearch(pos, ss, -VALUE_INFINITE, VALUE_INFINITE, Depth(0), 1, 0); pos.undo_move(moves[count].move); @@ -2154,7 +2153,9 @@ namespace { // the second move is assumed to be a move from the current position. bool connected_moves(const Position& pos, Move m1, Move m2) { + Square f1, t1, f2, t2; + Piece p; assert(move_is_ok(m1)); assert(move_is_ok(m2)); @@ -2180,31 +2181,32 @@ namespace { return true; // Case 4: The destination square for m2 is attacked by the moving piece in m1 - if (pos.piece_attacks_square(pos.piece_on(t1), t1, t2)) + p = pos.piece_on(t1); + if (bit_is_set(pos.attacks_from(p, t1), t2)) return true; // Case 5: Discovered check, checking piece is the piece moved in m1 - if ( piece_is_slider(pos.piece_on(t1)) + if ( piece_is_slider(p) && bit_is_set(squares_between(t1, pos.king_square(pos.side_to_move())), f2) - && !bit_is_set(squares_between(t2, pos.king_square(pos.side_to_move())), t2)) + && !bit_is_set(squares_between(t1, pos.king_square(pos.side_to_move())), t2)) { Bitboard occ = pos.occupied_squares(); Color us = pos.side_to_move(); Square ksq = pos.king_square(us); clear_bit(&occ, f2); - if (pos.type_of_piece_on(t1) == BISHOP) + if (type_of_piece(p) == BISHOP) { if (bit_is_set(bishop_attacks_bb(ksq, occ), t1)) return true; } - else if (pos.type_of_piece_on(t1) == ROOK) + else if (type_of_piece(p) == ROOK) { if (bit_is_set(rook_attacks_bb(ksq, occ), t1)) return true; } else { - assert(pos.type_of_piece_on(t1) == QUEEN); + assert(type_of_piece(p) == QUEEN); if (bit_is_set(queen_attacks_bb(ksq, occ), t1)) return true; } @@ -2268,12 +2270,13 @@ namespace { if (pos.type_of_piece_on(move_from(m)) == PAWN) { - if (pos.move_is_pawn_push_to_7th(m)) + Color c = pos.side_to_move(); + if (relative_rank(c, move_to(m)) == RANK_7) { result += PawnPushTo7thExtension[pvNode]; *dangerous = true; } - if (pos.move_is_passed_pawn_push(m)) + if (pos.pawn_is_passed(c, move_to(m))) { result += PassedPawnExtension[pvNode]; *dangerous = true; @@ -2439,8 +2442,9 @@ namespace { n = Slowdown; for (i = 0; i < n; i++) { Square s = Square(i&63); - if (count_1s(pos.attacks_to(s)) > 63) - std::cout << "This can't happen, but I put this string here anyway, in order to prevent the compiler from optimizing away the useless computation." << std::endl; + if (count_1s(pos.attackers_to(s)) > 63) + std::cout << "This can't happen, but I put this string here anyway, in order to " + "prevent the compiler from optimizing away the useless computation." << std::endl; } }