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93bc05cf69
Add infrastructure to threat killer moves as a vector, this will allow us to easily parametrize the number of killer moves, instead of hardcode this value to two as is now. This patch just add the infrastructure, no functional change. Signed-off-by: Marco Costalba <mcostalba@gmail.com>
93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
/*
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Stockfish, a UCI chess playing engine derived from Glaurung 2.1
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Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
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Copyright (C) 2008 Marco Costalba
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Stockfish is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Stockfish is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined(SEARCH_H_INCLUDED)
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#define SEARCH_H_INCLUDED
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////
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//// Includes
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////
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#include "types.h"
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#include "depth.h"
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#include "history.h"
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#include "lock.h"
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#include "movegen.h"
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#include "position.h"
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#include "tt.h"
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#include "value.h"
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////
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//// Constants
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////
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const int PLY_MAX = 100;
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const int PLY_MAX_PLUS_2 = 102;
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const int KILLER_MAX = 4;
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////
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//// Types
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////
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/// The SearchStack struct keeps track of the information we need to remember
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/// from nodes shallower and deeper in the tree during the search. Each
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/// search thread has its own array of SearchStack objects, indexed by the
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/// current ply.
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struct SearchStack {
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Move pv[PLY_MAX];
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Move currentMove;
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Value currentMoveCaptureValue;
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Move mateKiller;
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Move threatMove;
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Move killers[KILLER_MAX];
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Depth reduction;
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};
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////
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//// Global variables
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////
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extern SearchStack EmptySearchStack;
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extern TranspositionTable TT;
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extern int ActiveThreads;
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extern Lock SMPLock;
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// Perhaps better to make H local, and pass as parameter to MovePicker?
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extern History H;
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////
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//// Prototypes
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////
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extern void init_threads();
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extern void stop_threads();
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extern void think(const Position &pos, bool infinite, bool ponder, int side_to_move,
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int time[], int increment[], int movesToGo, int maxDepth,
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int maxNodes, int maxTime, Move searchMoves[]);
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extern int64_t nodes_searched();
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#endif // !defined(SEARCH_H_INCLUDED)
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