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| Rev | Author | Line No. | Line |
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| 169 | pmbaty | 1 | /* |
| 2 | Stockfish, a UCI chess playing engine derived from Glaurung 2.1 |
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| 3 | Copyright (c) 2013 Ronald de Man |
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| 4 | Copyright (C) 2016-2018 Marco Costalba, Lucas Braesch |
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| 5 | |||
| 6 | Stockfish is free software: you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation, either version 3 of the License, or |
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| 9 | (at your option) any later version. |
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| 10 | |||
| 11 | Stockfish is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | GNU General Public License for more details. |
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| 15 | |||
| 16 | You should have received a copy of the GNU General Public License |
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| 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
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| 18 | */ |
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| 19 | |||
| 96 | pmbaty | 20 | #ifndef TBPROBE_H |
| 21 | #define TBPROBE_H |
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| 22 | |||
| 169 | pmbaty | 23 | #include <ostream> |
| 24 | |||
| 96 | pmbaty | 25 | #include "../search.h" |
| 26 | |||
| 27 | namespace Tablebases { |
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| 28 | |||
| 169 | pmbaty | 29 | enum WDLScore { |
| 30 | WDLLoss = -2, // Loss |
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| 31 | WDLBlessedLoss = -1, // Loss, but draw under 50-move rule |
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| 32 | WDLDraw = 0, // Draw |
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| 33 | WDLCursedWin = 1, // Win, but draw under 50-move rule |
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| 34 | WDLWin = 2, // Win |
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| 35 | |||
| 36 | WDLScoreNone = -1000 |
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| 37 | }; |
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| 38 | |||
| 39 | // Possible states after a probing operation |
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| 40 | enum ProbeState { |
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| 41 | FAIL = 0, // Probe failed (missing file table) |
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| 42 | OK = 1, // Probe succesful |
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| 43 | CHANGE_STM = -1, // DTZ should check the other side |
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| 44 | ZEROING_BEST_MOVE = 2 // Best move zeroes DTZ (capture or pawn move) |
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| 45 | }; |
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| 46 | |||
| 96 | pmbaty | 47 | extern int MaxCardinality; |
| 48 | |||
| 169 | pmbaty | 49 | void init(const std::string& paths); |
| 50 | WDLScore probe_wdl(Position& pos, ProbeState* result); |
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| 51 | int probe_dtz(Position& pos, ProbeState* result); |
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| 154 | pmbaty | 52 | bool root_probe(Position& pos, Search::RootMoves& rootMoves, Value& score); |
| 53 | bool root_probe_wdl(Position& pos, Search::RootMoves& rootMoves, Value& score); |
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| 54 | void filter_root_moves(Position& pos, Search::RootMoves& rootMoves); |
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| 96 | pmbaty | 55 | |
| 169 | pmbaty | 56 | inline std::ostream& operator<<(std::ostream& os, const WDLScore v) { |
| 57 | |||
| 58 | os << (v == WDLLoss ? "Loss" : |
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| 59 | v == WDLBlessedLoss ? "Blessed loss" : |
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| 60 | v == WDLDraw ? "Draw" : |
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| 61 | v == WDLCursedWin ? "Cursed win" : |
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| 62 | v == WDLWin ? "Win" : "None"); |
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| 63 | |||
| 64 | return os; |
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| 96 | pmbaty | 65 | } |
| 66 | |||
| 169 | pmbaty | 67 | inline std::ostream& operator<<(std::ostream& os, const ProbeState v) { |
| 68 | |||
| 69 | os << (v == FAIL ? "Failed" : |
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| 70 | v == OK ? "Success" : |
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| 71 | v == CHANGE_STM ? "Probed opponent side" : |
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| 72 | v == ZEROING_BEST_MOVE ? "Best move zeroes DTZ" : "None"); |
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| 73 | |||
| 74 | return os; |
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| 75 | } |
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| 76 | |||
| 77 | } |
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| 78 | |||
| 96 | pmbaty | 79 | #endif |