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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 99 | pmbaty | 1 | /* |
| 2 | Texel - A UCI chess engine. |
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| 3 | Copyright (C) 2012-2014 Peter Österlund, peterosterlund2@gmail.com |
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| 4 | |||
| 5 | This program is free software: you can redistribute it and/or modify |
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| 6 | it under the terms of the GNU General Public License as published by |
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| 7 | the Free Software Foundation, either version 3 of the License, or |
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| 8 | (at your option) any later version. |
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| 9 | |||
| 10 | This program is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 13 | GNU General Public License for more details. |
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| 14 | |||
| 15 | You should have received a copy of the GNU General Public License |
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| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
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| 17 | */ |
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| 18 | |||
| 19 | /* |
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| 20 | * book.hpp |
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| 21 | * |
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| 22 | * Created on: Feb 25, 2012 |
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| 23 | * Author: petero |
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| 24 | */ |
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| 25 | |||
| 26 | #ifndef BOOK_HPP_ |
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| 27 | #define BOOK_HPP_ |
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| 28 | |||
| 29 | #include "move.hpp" |
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| 30 | #include "util/util.hpp" |
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| 31 | #include "util/random.hpp" |
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| 32 | |||
| 33 | #include <map> |
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| 34 | #include <vector> |
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| 35 | #include <cmath> |
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| 36 | |||
| 37 | class Position; |
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| 38 | |||
| 39 | /** |
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| 40 | * Implements an opening book. |
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| 41 | */ |
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| 42 | class Book { |
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| 43 | public: |
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| 44 | /** Constructor. */ |
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| 45 | Book(bool verbose0); |
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| 46 | |||
| 47 | /** Return a random book move for a position, or empty move if out of book. */ |
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| 48 | void getBookMove(Position& pos, Move& out); |
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| 49 | |||
| 50 | /** Return a string describing all book moves. */ |
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| 51 | std::string getAllBookMoves(const Position& pos); |
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| 52 | |||
| 53 | private: |
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| 54 | |||
| 55 | void initBook(); |
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| 56 | |||
| 57 | /** Add a move to a position in the opening book. */ |
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| 58 | void addToBook(const Position& pos, const Move& moveToAdd); |
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| 59 | |||
| 60 | int getWeight(int count); |
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| 61 | |||
| 62 | static void createBinBook(std::vector<S8>& binBook); |
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| 63 | |||
| 64 | /** Add a sequence of moves, starting from the initial position, to the binary opening book. */ |
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| 65 | static bool addBookLine(const std::string& line, std::vector<S8>& binBook); |
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| 66 | |||
| 67 | static int pieceToProm(int p); |
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| 68 | |||
| 69 | static int promToPiece(int prom, bool whiteMove); |
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| 70 | |||
| 71 | |||
| 72 | struct BookEntry { |
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| 73 | Move move; |
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| 74 | int count; |
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| 75 | BookEntry(const Move& m) : move(m), count(1) { } |
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| 76 | }; |
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| 77 | |||
| 78 | using BookMap = std::map<U64, std::vector<BookEntry>>; |
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| 79 | static BookMap bookMap; |
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| 80 | static Random rndGen; |
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| 81 | static int numBookMoves; |
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| 82 | bool verbose; |
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| 83 | |||
| 84 | static const char* bookLines[]; |
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| 85 | }; |
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| 86 | |||
| 87 | inline |
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| 88 | Book::Book(bool verbose0) |
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| 89 | : verbose(verbose0) { |
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| 90 | } |
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| 91 | |||
| 92 | #endif /* BOOK_HPP_ */ |