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
39 // Evaluation functions
40 KXK, // Generic "mate lone king" eval
49 KmmKm, // K and two minors vs K and one or two minors
52 KBPsK, // KB+pawns vs K
53 KQKRPs, // KQ vs KR+pawns
55 KRPPKRP, // KRPP vs KRP
56 KPsK, // King and pawns vs king
64 /// Template abstract base class for all special endgame functions
67 class EndgameFunctionBase {
69 EndgameFunctionBase(Color c) : strongerSide(c), weakerSide(opposite_color(c)) {}
70 virtual ~EndgameFunctionBase() {}
71 virtual T apply(const Position&) = 0;
72 Color color() const { return strongerSide; }
75 Color strongerSide, weakerSide;
78 typedef EndgameFunctionBase<Value> EndgameEvaluationFunctionBase;
79 typedef EndgameFunctionBase<ScaleFactor> EndgameScalingFunctionBase;
82 /// Templates subclass for various concrete endgames
85 struct EvaluationFunction : public EndgameEvaluationFunctionBase {
86 typedef EndgameEvaluationFunctionBase Base;
87 explicit EvaluationFunction(Color c): EndgameEvaluationFunctionBase(c) {}
88 Value apply(const Position&);
92 struct ScalingFunction : public EndgameScalingFunctionBase {
93 typedef EndgameScalingFunctionBase Base;
94 explicit ScalingFunction(Color c) : EndgameScalingFunctionBase(c) {}
95 ScaleFactor apply(const Position&);
103 extern void init_bitbases();
106 #endif // !defined(ENDGAME_H_INCLUDED)