X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmovepick.h;h=725c40dfa7fd6ddfcd99f4470f7183ed2b6cd887;hp=3c285c983ca52f195ad31d767d6b48611b4b346b;hb=ed72a1e9ba37a9fa2674da8f46bb0597a1721c2d;hpb=e14046517ed0a690c0969b3ca8d1b0e25ac9fb9e

diff --git a/src/movepick.h b/src/movepick.h
index 3c285c98..725c40df 100644
--- a/src/movepick.h
+++ b/src/movepick.h
@@ -32,14 +32,14 @@
 /// The Stats struct stores moves statistics. According to the template parameter
 /// the class can store History and Countermoves. History records how often
 /// different moves have been successful or unsuccessful during the current search
-/// and is used for reduction and move ordering decisions. 
+/// and is used for reduction and move ordering decisions.
 /// Countermoves store the move that refute a previous one. Entries are stored
 /// using only the moving piece and destination square, hence two moves with
 /// different origin but same destination and piece will be considered identical.
-template<typename T>
+template<typename T, bool CM = false>
 struct Stats {
 
-  static const Value Max = Value(250);
+  static const Value Max = Value(1 << 28);
 
   const T* operator[](Piece pc) const { return table[pc]; }
   T* operator[](Piece pc) { return table[pc]; }
@@ -53,17 +53,21 @@ struct Stats {
 
   void update(Piece pc, Square to, Value v) {
 
-    if (abs(table[pc][to] + v) < Max)
-        table[pc][to] +=  v;
+    if (abs(int(v)) >= 324)
+        return;
+
+    table[pc][to] -= table[pc][to] * abs(int(v)) / (CM ? 512 : 324);
+    table[pc][to] += int(v) * (CM ? 64 : 32);
   }
 
 private:
   T table[PIECE_NB][SQUARE_NB];
 };
 
-typedef Stats<Value> HistoryStats;
 typedef Stats<Move> MovesStats;
-typedef Stats<HistoryStats> CounterMovesHistoryStats;
+typedef Stats<Value, false> HistoryStats;
+typedef Stats<Value,  true> CounterMovesStats;
+typedef Stats<CounterMovesStats> CounterMovesHistoryStats;
 
 
 /// MovePicker class is used to pick one pseudo legal move at a time from the
@@ -78,11 +82,11 @@ public:
   MovePicker(const MovePicker&) = delete;
   MovePicker& operator=(const MovePicker&) = delete;
 
-  MovePicker(const Position&, Move, Depth, const HistoryStats&, const CounterMovesHistoryStats&, Square);
-  MovePicker(const Position&, Move, const HistoryStats&, const CounterMovesHistoryStats&, PieceType);
-  MovePicker(const Position&, Move, Depth, const HistoryStats&, const CounterMovesHistoryStats&, Move, Search::Stack*);
+  MovePicker(const Position&, Move, Depth, const HistoryStats&, Square);
+  MovePicker(const Position&, Move, const HistoryStats&, Value);
+  MovePicker(const Position&, Move, Depth, const HistoryStats&, const CounterMovesStats&, Move, Search::Stack*);
 
-  template<bool SpNode> Move next_move();
+  Move next_move();
 
 private:
   template<GenType> void score();
@@ -92,16 +96,16 @@ private:
 
   const Position& pos;
   const HistoryStats& history;
-  const CounterMovesHistoryStats& counterMovesHistory;
+  const CounterMovesStats* counterMovesHistory;
   Search::Stack* ss;
   Move countermove;
   Depth depth;
   Move ttMove;
   ExtMove killers[3];
   Square recaptureSquare;
-  Value captureThreshold;
+  Value threshold;
   int stage;
-  ExtMove *endQuiets, *endBadCaptures;
+  ExtMove *endQuiets, *endBadCaptures = moves + MAX_MOVES - 1;
   ExtMove moves[MAX_MOVES], *cur = moves, *endMoves = moves;
 };