X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fmovepick.h;h=93061ee6fc6a81c8aaf277b817dab41a0d02dd34;hb=3ed86ed3f95f712587bea62f4a7fc474812db458;hp=9aed12e18770d56bbef7b3315ec182d16c4758eb;hpb=6f6be95bad6f5371d9979de85f7f5892309b7aee;p=stockfish
diff --git a/src/movepick.h b/src/movepick.h
index 9aed12e1..93061ee6 100644
--- a/src/movepick.h
+++ b/src/movepick.h
@@ -1,7 +1,7 @@
/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2012 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2008-2013 Marco Costalba, Joona Kiiski, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -17,15 +17,56 @@
along with this program. If not, see .
*/
-#if !defined MOVEPICK_H_INCLUDED
+#ifndef MOVEPICK_H_INCLUDED
#define MOVEPICK_H_INCLUDED
-#include "history.h"
+#include // For std::max
+#include // For std::memset
+
+#include "movegen.h"
#include "position.h"
#include "search.h"
#include "types.h"
+/// 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.
+/// Countermoves store the move that refute a previous one. Entries are stored
+/// according only to moving piece and destination square, hence two moves with
+/// different origin but same destination and piece will be considered identical.
+template
+struct Stats {
+
+ static const Value Max = Value(2000);
+
+ const T* operator[](Piece p) const { return table[p]; }
+ void clear() { std::memset(table, 0, sizeof(table)); }
+
+ void update(Piece p, Square to, Move m) {
+
+ if (m == table[p][to].first)
+ return;
+
+ table[p][to].second = table[p][to].first;
+ table[p][to].first = m;
+ }
+
+ void update(Piece p, Square to, Value v) {
+
+ if (abs(table[p][to] + v) < Max)
+ table[p][to] += v;
+ }
+
+private:
+ T table[PIECE_NB][SQUARE_NB];
+};
+
+typedef Stats HistoryStats;
+typedef Stats > CountermovesStats;
+
+
/// 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,
@@ -38,26 +79,27 @@ class MovePicker {
MovePicker& operator=(const MovePicker&); // Silence a warning under MSVC
public:
- MovePicker(const Position&, Move, Depth, const History&, Search::Stack*, Value);
- MovePicker(const Position&, Move, Depth, const History&, Square);
- MovePicker(const Position&, Move, const History&, PieceType);
- Move next_move();
+ MovePicker(const Position&, Move, Depth, const HistoryStats&, Square);
+ MovePicker(const Position&, Move, const HistoryStats&, PieceType);
+ MovePicker(const Position&, Move, Depth, const HistoryStats&, Move*, Search::Stack*);
+
+ template Move next_move();
private:
- void score_captures();
- void score_noncaptures();
- void score_evasions();
- void next_phase();
+ template void score();
+ void generate_next();
const Position& pos;
- const History& H;
+ const HistoryStats& history;
+ Search::Stack* ss;
+ Move* countermoves;
Depth depth;
Move ttMove;
- MoveStack killers[2];
+ ExtMove killers[4];
Square recaptureSquare;
- int captureThreshold, phase;
- MoveStack *curMove, *lastMove, *lastQuiet, *badCaptures;
- MoveStack moves[MAX_MOVES];
+ int captureThreshold, stage;
+ ExtMove *cur, *end, *endQuiets, *endBadCaptures;
+ ExtMove moves[MAX_MOVES];
};
-#endif // !defined(MOVEPICK_H_INCLUDED)
+#endif // #ifndef MOVEPICK_H_INCLUDED