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endgame.h
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endgame.h
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/*
Glaurung, a UCI chess playing engine.
Copyright (C) 2004-2008 Tord Romstad
Glaurung is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Glaurung is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#if !defined(ENDGAME_H_INCLUDED)
#define ENDGAME_H_INCLUDED
////
//// Includes
////
#include "position.h"
#include "scale.h"
#include "value.h"
////
//// Types
////
/// Abstract base class for all special endgame evaluation functions:
class EndgameEvaluationFunction {
public:
EndgameEvaluationFunction(Color c);
virtual ~EndgameEvaluationFunction() { }
virtual Value apply(const Position &pos) =0;
protected:
Color strongerSide, weakerSide;
};
/// Subclasses for various concrete endgames:
// Generic "mate lone king" eval:
class KXKEvaluationFunction : public EndgameEvaluationFunction {
public:
KXKEvaluationFunction(Color c);
Value apply(const Position &pos);
};
// KBN vs K:
class KBNKEvaluationFunction : public EndgameEvaluationFunction {
public:
KBNKEvaluationFunction(Color c);
Value apply(const Position &pos);
};
// KP vs K:
class KPKEvaluationFunction : public EndgameEvaluationFunction {
public:
KPKEvaluationFunction(Color c);
Value apply(const Position &pos);
};
// KR vs KP:
class KRKPEvaluationFunction : public EndgameEvaluationFunction {
public:
KRKPEvaluationFunction(Color c);
Value apply(const Position &pos);
};
// KR vs KB:
class KRKBEvaluationFunction : public EndgameEvaluationFunction {
public:
KRKBEvaluationFunction(Color c);
Value apply(const Position &pos);
};
// KR vs KN:
class KRKNEvaluationFunction : public EndgameEvaluationFunction {
public:
KRKNEvaluationFunction(Color c);
Value apply(const Position &pos);
};
// KQ vs KR:
class KQKREvaluationFunction : public EndgameEvaluationFunction {
public:
KQKREvaluationFunction(Color c);
Value apply(const Position &pos);
};
/// Abstract base class for all evaluation scaling functions:
class ScalingFunction {
public:
ScalingFunction(Color c);
virtual ~ScalingFunction() { }
virtual ScaleFactor apply(const Position &pos) =0;
protected:
Color strongerSide, weakerSide;
};
/// Subclasses for various concrete endgames:
// KBP vs K:
class KBPKScalingFunction : public ScalingFunction {
public:
KBPKScalingFunction(Color c);
ScaleFactor apply(const Position &pos);
};
// KQ vs KRP:
class KQKRPScalingFunction: public ScalingFunction {
public:
KQKRPScalingFunction(Color c);
ScaleFactor apply(const Position &pos);
};
// KRP vs KR:
class KRPKRScalingFunction : public ScalingFunction {
public:
KRPKRScalingFunction(Color c);
ScaleFactor apply(const Position &pos);
};
// KRPP vs KRP:
class KRPPKRPScalingFunction : public ScalingFunction {
public:
KRPPKRPScalingFunction(Color c);
ScaleFactor apply(const Position &pos);
};
// King and pawns vs king:
class KPsKScalingFunction : public ScalingFunction {
public:
KPsKScalingFunction(Color c);
ScaleFactor apply(const Position &pos);
};
// KBP vs KB:
class KBPKBScalingFunction : public ScalingFunction {
public:
KBPKBScalingFunction(Color c);
ScaleFactor apply(const Position &pos);
};
// KBP vs KN:
class KBPKNScalingFunction : public ScalingFunction {
public:
KBPKNScalingFunction(Color c);
ScaleFactor apply(const Position &pos);
};
// KNP vs K:
class KNPKScalingFunction : public ScalingFunction {
public:
KNPKScalingFunction(Color c);
ScaleFactor apply(const Position &pos);
};
// KP vs KP:
class KPKPScalingFunction : public ScalingFunction {
public:
KPKPScalingFunction(Color c);
ScaleFactor apply(const Position &pos);
};
////
//// Constants and variables
////
// Generic "mate lone king" eval:
extern KXKEvaluationFunction EvaluateKXK, EvaluateKKX;
// KBN vs K:
extern KBNKEvaluationFunction EvaluateKBNK, EvaluateKKBN;
// KP vs K:
extern KPKEvaluationFunction EvaluateKPK, EvaluateKKP;
// KR vs KP:
extern KRKPEvaluationFunction EvaluateKRKP, EvaluateKPKR;
// KR vs KB:
extern KRKBEvaluationFunction EvaluateKRKB, EvaluateKBKR;
// KR vs KN:
extern KRKNEvaluationFunction EvaluateKRKN, EvaluateKNKR;
// KQ vs KR:
extern KQKREvaluationFunction EvaluateKQKR, EvaluateKRKQ;
// KBP vs K:
extern KBPKScalingFunction ScaleKBPK, ScaleKKBP;
// KQ vs KRP:
extern KQKRPScalingFunction ScaleKQKRP, ScaleKRPKQ;
// KRP vs KR:
extern KRPKRScalingFunction ScaleKRPKR, ScaleKRKRP;
// KRPP vs KRP:
extern KRPPKRPScalingFunction ScaleKRPPKRP, ScaleKRPKRPP;
// King and pawns vs king:
extern KPsKScalingFunction ScaleKPsK, ScaleKKPs;
// KBP vs KB:
extern KBPKBScalingFunction ScaleKBPKB, ScaleKBKBP;
// KBP vs KN:
extern KBPKNScalingFunction ScaleKBPKN, ScaleKNKBP;
// KNP vs K:
extern KNPKScalingFunction ScaleKNPK, ScaleKKNP;
// KP vs KP:
extern KPKPScalingFunction ScaleKPKPw, ScaleKPKPb;
////
//// Prototypes
////
extern void init_bitbases();
#endif // !defined(ENDGAME_H_INCLUDED)