2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
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/>.
20 #if !defined(SEARCH_H_INCLUDED)
21 #define SEARCH_H_INCLUDED
33 /// The Stack struct keeps track of the information we need to remember from
34 /// nodes shallower and deeper in the tree during the search. Each search thread
35 /// has its own array of Stack objects, indexed by the current ply.
51 /// The LimitsType struct stores information sent by GUI about available time
52 /// to search the current move, maximum depth/time, if we are in analysis mode
53 /// or if we have to ponder while is our opponent's side to move.
57 LimitsType() { memset(this, 0, sizeof(LimitsType)); }
58 bool useTimeManagement() const { return !(maxTime | maxDepth | maxNodes | infinite); }
60 int time, increment, movesToGo, maxTime, maxDepth, maxNodes, infinite, ponder;
64 /// The SignalsType struct stores volatile flags updated during the search
65 /// typically in an async fashion, for instance to stop the search by the GUI.
68 bool stopOnPonderhit, firstRootMove, stop, failedLowAtRoot;
71 extern volatile SignalsType Signals;
72 extern LimitsType Limits;
73 extern std::vector<Move> RootMoves;
74 extern Position RootPosition;
77 extern int64_t perft(Position& pos, Depth depth);
82 #endif // !defined(SEARCH_H_INCLUDED)