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/>.
20 #if !defined(ENDGAME_H_INCLUDED)
21 #define ENDGAME_H_INCLUDED
28 // Evaluation functions
29 KXK, // Generic "mate lone king" eval
38 KmmKm, // K and two minors vs K and one or two minors
41 KBPsK, // KB+pawns vs K
42 KQKRPs, // KQ vs KR+pawns
44 KRPPKRP, // KRPP vs KRP
45 KPsK, // King and pawns vs king
53 /// Template abstract base class for all special endgame functions
56 class EndgameFunctionBase {
58 EndgameFunctionBase(Color c) : strongerSide(c), weakerSide(opposite_color(c)) {}
59 virtual ~EndgameFunctionBase() {}
60 virtual T apply(const Position&) const = 0;
61 Color color() const { return strongerSide; }
64 Color strongerSide, weakerSide;
67 typedef EndgameFunctionBase<Value> EndgameEvaluationFunctionBase;
68 typedef EndgameFunctionBase<ScaleFactor> EndgameScalingFunctionBase;
71 /// Templates subclass for various concrete endgames
74 struct EvaluationFunction : public EndgameEvaluationFunctionBase {
75 typedef EndgameEvaluationFunctionBase Base;
76 explicit EvaluationFunction(Color c): EndgameEvaluationFunctionBase(c) {}
77 Value apply(const Position&) const;
81 struct ScalingFunction : public EndgameScalingFunctionBase {
82 typedef EndgameScalingFunctionBase Base;
83 explicit ScalingFunction(Color c) : EndgameScalingFunctionBase(c) {}
84 ScaleFactor apply(const Position&) const;
87 #endif // !defined(ENDGAME_H_INCLUDED)