X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmovepick.h;h=9e81e218247a165269a8d4ed44392352501d0886;hp=a835346db341b62c297c6f999247e561e9e570c6;hb=14dbeb22dd04f0954322a58c26833506fb4532a9;hpb=d3600c39a745179ed6b094b305d0645e83a1ee86

diff --git a/src/movepick.h b/src/movepick.h
index a835346d..9e81e218 100644
--- a/src/movepick.h
+++ b/src/movepick.h
@@ -1,18 +1,18 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008 Marco Costalba
+  Copyright (C) 2008-2009 Marco Costalba
 
   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.
-  
+
   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 <http://www.gnu.org/licenses/>.
 */
@@ -26,7 +26,7 @@
 ////
 
 #include "depth.h"
-#include "lock.h"
+#include "history.h"
 #include "position.h"
 
 
@@ -34,9 +34,11 @@
 //// Types
 ////
 
+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
+/// 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
 /// MovePicker::pick_next_move(), which returns a new legal move each time it
 /// is called, until there are no legal moves left, when MOVE_NONE is returned.
 /// In order to improve the efficiency of the alpha beta algorithm, MovePicker
@@ -44,50 +46,27 @@
 
 class MovePicker {
 
-public:
+  MovePicker& operator=(const MovePicker&); // silence a warning under MSVC
 
-  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 valuse <= 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, Move mk, Move k1, Move k2, Depth d);
+public:
+  MovePicker(const Position& p, Move ttm, Depth d, const History& h, SearchStack* ss = NULL, Value beta = -VALUE_INFINITE);
   Move get_next_move();
-  Move get_next_move(Lock &lock);
-  int number_of_moves() const;
-  int current_move_score() const;
-  MovegenPhase current_move_type() const;
-  Bitboard discovered_check_candidates() const;
-
-  static void init_phase_table();
+  int number_of_evasions() const;
 
 private:
   void score_captures();
   void score_noncaptures();
-  void score_evasions();
-  void score_qcaptures();
-  Move pick_move_from_list();
-  int find_best_index();
-  
+  void score_evasions_or_checks();
+  void go_next_phase();
+
   const Position& pos;
-  Move ttMove, mateKiller, killer1, killer2;
-  Bitboard pinned, dc;
+  const History& H;
+  MoveStack ttMoves[2], killers[2];
+  int badCaptureThreshold, phase;
+  const uint8_t* phasePtr;
+  MoveStack *curMove, *lastMove, *lastGoodNonCapture, *lastBadCapture;
+  Bitboard pinned;
   MoveStack moves[256], badCaptures[64];
-  bool pvNode;
-  Depth depth;
-  int phaseIndex;
-  int numOfMoves, numOfBadCaptures;
-  int movesPicked, badCapturesPicked;
-  bool finished;
 };
 
 
@@ -95,21 +74,14 @@ 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.
+/// MovePicker::number_of_evasions() simply returns the number of moves in
+/// evasions phase. 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.
+/// WARNING: It works as long as PH_EVASIONS is the _only_ phase for evasions.
 
-inline Bitboard MovePicker::discovered_check_candidates() const {
-  return dc;
+inline int MovePicker::number_of_evasions() const {
+  return int(lastMove - moves);
 }
 
 #endif // !defined(MOVEPICK_H_INCLUDED)