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67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
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/*
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Texel - A UCI chess engine.
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Copyright (C) 2014 Peter Österlund, peterosterlund2@gmail.com
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This program 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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This program 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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/*
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* tbprobe.hpp
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*
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* Created on: Jun 2, 2014
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* Author: petero
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*/
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#ifndef TBPROBE_HPP_
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#define TBPROBE_HPP_
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#include "moveGen.hpp"
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#include <string>
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class Position;
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/**
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* Handle tablebase probing.
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*/
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class TBProbe {
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public:
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/** Initialize tablebases. */
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static void initialize(const std::string& rtbPath);
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/**
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* Probe syzygy DTZ tablebases.
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* @param pos The position to probe. The position can be temporarily modified
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* but is restored to original state before function returns.
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* @param score The tablebase score. Only modified for tablebase hits.
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* The returned score is either 0 or a mate bound. The bound
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* is computed by considering the DTZ value and the maximum number
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* of zeroing moves before mate.
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*/
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static bool rtbProbeDTZ(Position& pos, int& score);
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/**
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* Probe syzygy WDL tablebases.
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* @param pos The position to probe. The position can be temporarily modified
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* but is restored to original state before function returns.
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* @param score The tablebase score. Only modified for tablebase hits.
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* The returned score is either 0 or +/- 1.
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*/
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static bool rtbProbeWDL(Position& pos, int& score);
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};
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#endif /* TBPROBE_HPP_ */
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