syzygy-tables.info
command-line-chess
| syzygy-tables.info | command-line-chess | |
|---|---|---|
| 15 | 1 | |
| 59 | 487 | |
| - | - | |
| 7.7 | 3.1 | |
| about 2 months ago | 6 months ago | |
| Python | Python | |
| GNU Affero General Public License v3.0 | MIT License |
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syzygy-tables.info
- TIL that chess is completely solved with 7 pieces(any combinations) left on the board. This solution is stored in a database table that's 17 terabytes in size.
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Is this a draw?
If both sides play correctly, yes this is a draw. Chess is solved with fewer than 7 pieces on the board. At this website, you can check any such position and see what the result will be, assuming perfect play from both sides
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Chess, unlike war, is a game of perfect information
There is some truth to this.
In theory, chess is a game of perfect information.
But in practice, this is only true for ~6-piece endgames: every outcome has been / can be computed. But for any middle- or early-game position, the amount of finite information greatly exceeds any person's or computer's capacity, practically speaking.
In concrete terms, the tablebase for 6-piece endgames is ~150 GiB. For 7-piece, it's 16 TiB.
[1] https://syzygy-tables.info/
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Sechs Jahre nach AlphaGo: Mensch besiegt erneut "zuverlässig" stärkste Go-KIs
Syzygy-Tables https://www.chessprogramming.org/Syzygy_Bases
- Syzygy Endgame Tablebases
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Analysis board, practicing with the computer settings.
Alternatively, if you're playing an endgame with seven or fewer pieces, I suggest you use the Syzygy 7-piece tablebase to get the objectively best response on every move.
- This puzzle a master showed me today. Can you find the mate in 2?
- Syzygy Chess Endgame Tablebases
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White to move and mate in 584 (longest forced mate ever found)
I suppose you mean the syzgy 7 man tablebases? Yes, they do take 50MR into account because they use DTZ metric (fastest way to checkmate, capture or pawn move).
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What is the longest possible forced mate sequence with K - K + Q on the board? I managed to find a #10 at most but I suspect that you can get more. Has this been investigated?
I'd assume that Stockfish just hasn't found the M9. Tablebases already know the quickest mates in a given position, you can check the tablebase here
command-line-chess
What are some alternatives?
python-chess - A chess library for Python, with move generation and validation, PGN parsing and writing, Polyglot opening book reading, Gaviota tablebase probing, Syzygy tablebase probing, and UCI/XBoard engine communication
irwin - irwin - the protector of lichess from all chess players villainous
lichess-bot - A bridge between Lichess API and chess engines
pgnToFen - Takes PGN as input and returns FEN
pychess - PyChess - a chess client for Linux/Windows
python-chess-annotator - Reads chess games in PGN format and adds annotations using an engine
ChessPositionRanking - Software suite for ranking chess positions and accurately estimating the number of legal chess positions
Play-online-chess-with-real-chess-board - Program that enables you to play online chess using real chess boards.
chessli - A free and open source chess improvement app that combines the power of Lichess and Anki.
maia-chess - Maia is a human-like neural network chess engine trained on millions of human games.
chess-pipeline - Pulling games from the Lichess API into a PostgreSQL database for data analysis.