2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008-2009 Marco Costalba
6 Stockfish is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 Stockfish is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #if !defined(SEARCH_H_INCLUDED)
22 #define SEARCH_H_INCLUDED
37 const int PLY_MAX = 100;
38 const int PLY_MAX_PLUS_2 = 102;
39 const int KILLER_MAX = 2;
46 /// The SearchStack struct keeps track of the information we need to remember
47 /// from nodes shallower and deeper in the tree during the search. Each
48 /// search thread has its own array of SearchStack objects, indexed by the
53 Move pv[PLY_MAX_PLUS_2];
57 Move killers[KILLER_MAX];
70 extern void init_search();
71 extern void init_threads();
72 extern void exit_threads();
73 extern bool think(const Position &pos, bool infinite, bool ponder, int side_to_move,
74 int time[], int increment[], int movesToGo, int maxDepth,
75 int maxNodes, int maxTime, Move searchMoves[]);
76 extern int perft(Position &pos, Depth depth);
77 extern int64_t nodes_searched();
80 #endif // !defined(SEARCH_H_INCLUDED)