X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmovepick.h;h=1c8d0d30fa08a629b4986cbba8708e5a3debe9c1;hp=ca052c7bd1901c250f35d0fea3aaf0c5fc422a05;hb=de050db2b096d92f73f1e23a4dcb3bfef4c098f6;hpb=bb751d6c890f5c50c642366d601740366cfae8d0 diff --git a/src/movepick.h b/src/movepick.h index ca052c7b..1c8d0d30 100644 --- a/src/movepick.h +++ b/src/movepick.h @@ -1,17 +1,18 @@ /* - Glaurung, a UCI chess playing engine. - Copyright (C) 2004-2008 Tord Romstad + Stockfish, a UCI chess playing engine derived from Glaurung 2.1 + Copyright (C) 2004-2008 Tord Romstad (Glaurung author) + Copyright (C) 2008 Marco Costalba - Glaurung is free software: you can redistribute it and/or modify + Stockfish is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. - - Glaurung is distributed in the hope that it will be useful, + + Stockfish is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - + You should have received a copy of the GNU General Public License along with this program. If not, see . */ @@ -33,6 +34,9 @@ //// Types //// +struct EvalInfo; +struct SearchStack; + /// MovePicker is a class which is used to pick one legal move at a time from /// the current position. It is initialized with a Position object and a few /// moves we have reason to believe are good. The most important method is @@ -43,14 +47,30 @@ class MovePicker { + MovePicker& operator=(const MovePicker&); // Silence a warning under MSVC + public: - MovePicker(Position &p, bool pvnode, Move ttm, Move mk, Move k1, Move k2, - Depth dpth); + + enum MovegenPhase { + PH_TT_MOVE, // Transposition table move + PH_MATE_KILLER, // Mate killer from the current ply + PH_GOOD_CAPTURES, // Queen promotions and captures with SEE values >= 0 + PH_BAD_CAPTURES, // Queen promotions and captures with SEE values < 0 + PH_KILLER_1, // Killer move 1 from the current ply (not used yet). + PH_KILLER_2, // Killer move 2 from the current ply (not used yet). + PH_NONCAPTURES, // Non-captures and underpromotions + PH_EVASIONS, // Check evasions + PH_QCAPTURES, // Captures in quiescence search + PH_QCHECKS, // Checks in quiescence search + PH_STOP + }; + + MovePicker(const Position& p, bool pvnode, Move ttm, const SearchStack& ss, Depth d); Move get_next_move(); Move get_next_move(Lock &lock); int number_of_moves() const; int current_move_score() const; - Bitboard discovered_check_candidates(); + Bitboard discovered_check_candidates() const; static void init_phase_table(); @@ -60,8 +80,9 @@ private: void score_evasions(); void score_qcaptures(); Move pick_move_from_list(); - - Position *pos; + int find_best_index() const; + + const Position& pos; Move ttMove, mateKiller, killer1, killer2; Bitboard pinned, dc; MoveStack moves[256], badCaptures[64]; @@ -69,7 +90,7 @@ private: Depth depth; int phaseIndex; int numOfMoves, numOfBadCaptures; - int movesPicked, badCapturesPicked; + int movesPicked; bool finished; }; @@ -78,11 +99,20 @@ private: //// Inline functions //// +/// MovePicker::number_of_moves() simply returns the numOfMoves member +/// variable. It is intended to be used in positions where the side to move +/// is in check, for detecting checkmates or situations where there is only +/// a single reply to check. + +inline int MovePicker::number_of_moves() const { + return numOfMoves; +} + /// MovePicker::discovered_check_candidates() returns a bitboard containing /// all pieces which can possibly give discovered check. This bitboard is /// computed by the constructor function. -inline Bitboard MovePicker::discovered_check_candidates() { +inline Bitboard MovePicker::discovered_check_candidates() const { return dc; }