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
30 /// EndgameType lists all supported endgames
34 // Evaluation functions
36 KXK, // Generic "mate lone king" eval
45 KmmKm, // K and two minors vs K and one or two minors
50 KBPsK, // KB+pawns vs K
51 KQKRPs, // KQ vs KR+pawns
53 KRPPKRP, // KRPP vs KRP
54 KPsK, // King and pawns vs king
63 /// Base and derived templates for endgame evaluation and scaling functions
68 typedef EndgameBase<T> Base;
70 virtual ~EndgameBase() {}
71 virtual Color color() const = 0;
72 virtual T apply(const Position&) const = 0;
76 template<typename T, EndgameType>
77 struct Endgame : public EndgameBase<T> {
79 explicit Endgame(Color c) : strongerSide(c), weakerSide(opposite_color(c)) {}
80 Color color() const { return strongerSide; }
81 T apply(const Position&) const;
84 Color strongerSide, weakerSide;
88 /// Endgames class stores in two std::map the pointers to endgame evaluation
89 /// and scaling base objects. Then we use polymorphism to invoke the actual
90 /// endgame function calling its apply() method that is virtual.
94 typedef std::map<Key, EndgameBase<Value>* > EFMap;
95 typedef std::map<Key, EndgameBase<ScaleFactor>* > SFMap;
100 template<class T> T* get(Key key) const;
103 template<class T> void add(const std::string& keyCode);
105 // Here we store two maps, for evaluate and scaling functions...
106 std::pair<EFMap, SFMap> maps;
108 // ...and here is the accessing template function
109 template<typename T> const std::map<Key, T*>& get() const;
112 #endif // !defined(ENDGAME_H_INCLUDED)