X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=ac4d85b69996eb7abadda3cf61fcd9d50ec39cf7;hp=f0d2431487641dc765f5c56d1a7a029f7cf439ef;hb=7c55b0e880b68c0242d27a0471f8d535f02703f0;hpb=a1096e55cfccd9700602287a15ac4051746db953 diff --git a/src/search.cpp b/src/search.cpp index f0d24314..ac4d85b6 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) @@ -975,6 +972,7 @@ namespace { // Update PV rml.set_move_score(i, value); update_pv(ss, 0); + TT.extract_pv(pos, ss[0].pv); rml.set_move_pv(i, ss[0].pv); if (MultiPV == 1) @@ -988,6 +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() @@ -1091,16 +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 @@ -1109,7 +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); @@ -1366,7 +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); @@ -1540,10 +1540,10 @@ namespace { // Use the cached evaluation score if possible assert(ei.futilityMargin == Value(0)); - staticValue = tte->value(); + staticValue = tte->value() + ply; } else - staticValue = evaluate(pos, ei, threadID); + staticValue = evaluate(pos, ei, threadID) + ply; if (ply == PLY_MAX - 1) return evaluate(pos, ei, threadID); @@ -1962,15 +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; @@ -1979,7 +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); @@ -2185,7 +2185,7 @@ namespace { // Case 5: Discovered check, checking piece is the piece moved in m1 if ( piece_is_slider(pos.piece_on(t1)) && 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(); @@ -2267,12 +2267,13 @@ 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; @@ -2430,7 +2431,7 @@ namespace { } - // slowdown() simply wastes CPU cycles doing nothing useful. It's used + // slowdown() simply wastes CPU cycles doing nothing useful. It's used // in strength handicap mode. void slowdown(const Position &pos) {