mirror of
https://github.com/sockspls/badfish
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127 lines
4 KiB
C++
127 lines
4 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(ENDGAME_H_INCLUDED)
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#define ENDGAME_H_INCLUDED
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////
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//// Includes
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////
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#include "position.h"
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#include "scale.h"
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#include "value.h"
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////
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//// Types
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////
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enum EndgameType {
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// Evaluation functions
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KXK, // Generic "mate lone king" eval
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KBNK, // KBN vs K
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KPK, // KP vs K
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KRKP, // KR vs KP
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KRKB, // KR vs KB
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KRKN, // KR vs KN
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KQKR, // KQ vs KR
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KBBKN, // KBB vs KN
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KmmKm, // K and two minors vs K and one or two minors
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// Scaling functions
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KBPK, // KBP vs K
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KQKRP, // KQ vs KRP
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KRPKR, // KRP vs KR
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KRPPKRP, // KRPP vs KRP
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KPsK, // King and pawns vs king
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KBPKB, // KBP vs KB
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KBPPKB, // KBPP vs KB
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KBPKN, // KBP vs KN
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KNPK, // KNP vs K
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KPKP // KP vs KP
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};
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/// Template abstract base class for all special endgame functions
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template<typename T>
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class EndgameFunctionBase {
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public:
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EndgameFunctionBase(Color c) : strongerSide(c) { weakerSide = opposite_color(strongerSide); }
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virtual ~EndgameFunctionBase() {}
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virtual T apply(const Position&) = 0;
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protected:
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Color strongerSide, weakerSide;
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};
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typedef EndgameFunctionBase<Value> EndgameEvaluationFunctionBase;
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typedef EndgameFunctionBase<ScaleFactor> EndgameScalingFunctionBase;
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/// Templates subclass for various concrete endgames
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template<EndgameType>
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struct EvaluationFunction : public EndgameEvaluationFunctionBase {
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explicit EvaluationFunction(Color c): EndgameEvaluationFunctionBase(c) {}
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Value apply(const Position&);
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};
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template<EndgameType>
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struct ScalingFunction : public EndgameScalingFunctionBase {
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explicit ScalingFunction(Color c) : EndgameScalingFunctionBase(c) {}
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ScaleFactor apply(const Position&);
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};
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////
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//// Constants and variables
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////
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extern EvaluationFunction<KXK> EvaluateKXK, EvaluateKKX; // Generic "mate lone king" eval
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extern EvaluationFunction<KBNK> EvaluateKBNK, EvaluateKKBN; // KBN vs K
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extern EvaluationFunction<KPK> EvaluateKPK, EvaluateKKP; // KP vs K
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extern EvaluationFunction<KRKP> EvaluateKRKP, EvaluateKPKR; // KR vs KP
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extern EvaluationFunction<KRKB> EvaluateKRKB, EvaluateKBKR; // KR vs KB
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extern EvaluationFunction<KRKN> EvaluateKRKN, EvaluateKNKR; // KR vs KN
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extern EvaluationFunction<KQKR> EvaluateKQKR, EvaluateKRKQ; // KQ vs KR
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extern EvaluationFunction<KBBKN> EvaluateKBBKN, EvaluateKNKBB; // KBB vs KN
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extern EvaluationFunction<KmmKm> EvaluateKmmKm; // K and two minors vs K and one or two minors:
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extern ScalingFunction<KBPK> ScaleKBPK, ScaleKKBP; // KBP vs K
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extern ScalingFunction<KQKRP> ScaleKQKRP, ScaleKRPKQ; // KQ vs KRP
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extern ScalingFunction<KRPKR> ScaleKRPKR, ScaleKRKRP; // KRP vs KR
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extern ScalingFunction<KRPPKRP> ScaleKRPPKRP, ScaleKRPKRPP; // KRPP vs KRP
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extern ScalingFunction<KPsK> ScaleKPsK, ScaleKKPs; // King and pawns vs king
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extern ScalingFunction<KBPKB> ScaleKBPKB, ScaleKBKBP; // KBP vs KB
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extern ScalingFunction<KBPPKB> ScaleKBPPKB, ScaleKBKBPP; // KBPP vs KB
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extern ScalingFunction<KBPKN> ScaleKBPKN, ScaleKNKBP; // KBP vs KN
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extern ScalingFunction<KNPK> ScaleKNPK, ScaleKKNP; // KNP vs K
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extern ScalingFunction<KPKP> ScaleKPKPw, ScaleKPKPb; // KP vs KP
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////
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//// Prototypes
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////
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extern void init_bitbases();
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#endif // !defined(ENDGAME_H_INCLUDED)
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