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/>.
21 #if !defined(ENDGAME_H_INCLUDED)
22 #define ENDGAME_H_INCLUDED
38 // Evaluation functions
39 KXK, // Generic "mate lone king" eval
48 KmmKm, // K and two minors vs K and one or two minors
51 KBPsK, // KB+pawns vs K
52 KQKRPs, // KQ vs KR+pawns
54 KRPPKRP, // KRPP vs KRP
55 KPsK, // King and pawns vs king
63 /// Template abstract base class for all special endgame functions
66 class EndgameFunctionBase {
68 EndgameFunctionBase(Color c) : strongerSide(c), weakerSide(opposite_color(c)) {}
69 virtual ~EndgameFunctionBase() {}
70 virtual T apply(const Position&) const = 0;
71 Color color() const { return strongerSide; }
74 Color strongerSide, weakerSide;
77 typedef EndgameFunctionBase<Value> EndgameEvaluationFunctionBase;
78 typedef EndgameFunctionBase<ScaleFactor> EndgameScalingFunctionBase;
81 /// Templates subclass for various concrete endgames
84 struct EvaluationFunction : public EndgameEvaluationFunctionBase {
85 typedef EndgameEvaluationFunctionBase Base;
86 explicit EvaluationFunction(Color c): EndgameEvaluationFunctionBase(c) {}
87 Value apply(const Position&) const;
91 struct ScalingFunction : public EndgameScalingFunctionBase {
92 typedef EndgameScalingFunctionBase Base;
93 explicit ScalingFunction(Color c) : EndgameScalingFunctionBase(c) {}
94 ScaleFactor apply(const Position&) const;
102 extern void init_bitbases();
105 #endif // !defined(ENDGAME_H_INCLUDED)