Remove HistoryStats

[stockfish] / src / movepick.h

diff --git a/src/movepick.h b/src/movepick.h
index e69255e604b117f38e1900b397fff43ec159e398..b59b0e93ba33a469419a9dbbfab8ecbad3eb6c6b 100644 (file)
--- a/src/movepick.h
+++ b/src/movepick.h
@@ -26,7 +26,6 @@
 
 #include "movegen.h"
 #include "position.h"
-#include "search.h"
 #include "types.h"
 
 
@@ -39,15 +38,10 @@
 /// different origin but same destination and piece will be considered identical.
 template<typename T, bool CM = false>
 struct Stats {
-
-  static const Value Max = Value(1 << 28);
-
   const T* operator[](Piece pc) const { return table[pc]; }
   T* operator[](Piece pc) { return table[pc]; }
   void clear() { std::memset(table, 0, sizeof(table)); }
-
   void update(Piece pc, Square to, Move m) { table[pc][to] = m; }
-
   void update(Piece pc, Square to, Value v) {
 
     if (abs(int(v)) >= 324)
@@ -62,37 +56,39 @@ private:
 };
 
 typedef Stats<Move> MoveStats;
-typedef Stats<Value, false> HistoryStats;
-typedef Stats<Value,  true> CounterMoveStats;
+typedef Stats<Value, true> CounterMoveStats;
 typedef Stats<CounterMoveStats> CounterMoveHistoryStats;
 
 struct FromToStats {
 
-    Value get(Color c, Move m) const { return table[c][from_sq(m)][to_sq(m)]; }
-    void clear() { std::memset(table, 0, sizeof(table)); }
+  static const Value Max = Value(1 << 28);
+
+  Value get(Color c, Move m) const { return table[c][from_sq(m)][to_sq(m)]; }
+  void clear() { std::memset(table, 0, sizeof(table)); }
+  void update(Color c, Move m, Value v) {
 
-    void update(Color c, Move m, Value v)
-    {
-        if (abs(int(v)) >= 324)
-            return;
+    if (abs(int(v)) >= 324)
+        return;
 
-        Square f = from_sq(m);
-        Square t = to_sq(m);
+    Square from = from_sq(m);
+    Square to = to_sq(m);
 
-        table[c][f][t] -= table[c][f][t] * abs(int(v)) / 324;
-        table[c][f][t] += int(v) * 32;
-    }
+    table[c][from][to] -= table[c][from][to] * abs(int(v)) / 324;
+    table[c][from][to] += int(v) * 32;
+  }
 
 private:
-    Value table[COLOR_NB][SQUARE_NB][SQUARE_NB];
+  Value table[COLOR_NB][SQUARE_NB][SQUARE_NB];
 };
 
+
 /// MovePicker class is used to pick one pseudo legal move at a time from the
 /// current position. The most important method is next_move(), which returns a
 /// new pseudo legal move each time it is called, until there are no moves left,
 /// when MOVE_NONE is returned. In order to improve the efficiency of the alpha
 /// beta algorithm, MovePicker attempts to return the moves which are most likely
 /// to get a cut-off first.
+namespace Search { struct Stack; }
 
 class MovePicker {
 public:
@@ -104,12 +100,10 @@ public:
   MovePicker(const Position&, Move, Depth, Search::Stack*);
 
   Move next_move();
-  int see_sign() const;
 
 private:
   template<GenType> void score();
-  void generate_next_stage();
-  ExtMove* begin() { return moves; }
+  ExtMove* begin() { return cur; }
   ExtMove* end() { return endMoves; }
 
   const Position& pos;
@@ -117,12 +111,11 @@ private:
   Move countermove;
   Depth depth;
   Move ttMove;
-  ExtMove killers[3];
   Square recaptureSquare;
   Value threshold;
   int stage;
-  ExtMove* endBadCaptures = moves + MAX_MOVES - 1;
-  ExtMove moves[MAX_MOVES], *cur = moves, *endMoves = moves;
+  ExtMove *cur, *endMoves, *endBadCaptures;
+  ExtMove moves[MAX_MOVES];
 };
 
 #endif // #ifndef MOVEPICK_H_INCLUDED