"""
Module for the SyzygyTable class.
"""
import shakmaty_python_binding
import chipiron.environments.chess_env.board as boards
from chipiron.environments.chess_env.board import RustyBoardChi
from chipiron.utils import path
from .syzygy_table import SyzygyTable
[docs]class SyzygyRustTable(SyzygyTable[RustyBoardChi]):
"""
A class representing a Syzygy tablebase for chess endgame analysis.
Attributes:
table_base (chess.syzygy.Tablebase): The Syzygy tablebase object.
Methods:
fast_in_table(board: boards.BoardChi) -> bool:
Check if the given board is suitable for fast tablebase lookup.
in_table(board: boards.BoardChi) -> bool:
Check if the given board is in the tablebase.
get_over_event(board: boards.BoardChi) -> tuple[Winner, HowOver]:
Get the winner and how the game is over for the given board.
val(board: boards.BoardChi) -> int:
Get the value of the given board from the tablebase.
value_white(board: boards.BoardChi) -> int:
Get the value of the given board for the white player.
get_over_tag(board: boards.BoardChi) -> OverTags:
Get the over tag for the given board.
string_result(board: boards.BoardChi) -> str:
Get the string representation of the result for the given board.
dtz(board: boards.BoardChi) -> int:
Get the distance-to-zero (DTZ) value for the given board.
best_move(board: boards.BoardChi) -> chess.Move:
Get the best move according to the tablebase for the given board.
"""
table_base: shakmaty_python_binding.MyTableBase
def __init__(self, path_to_table: path):
"""
Initialize the SyzygyTable object.
Args:
path_to_table (path): The path to the Syzygy tablebase.
"""
path_to_table_str: str = str(path_to_table)
self.table_base = shakmaty_python_binding.MyTableBase(path_to_table_str)
[docs] def wdl(self, board: boards.RustyBoardChi) -> int:
wdl: int = self.table_base.probe_wdl(board.chess_)
return wdl
[docs] def dtz(self, board: boards.RustyBoardChi) -> int:
"""
Get the distance-to-zero (DTZ) value for the given board.
Args:
board (boards.BoardChi): The board to get the DTZ value for.
Returns:
int: The DTZ value for the board.
"""
dtz: int = self.table_base.probe_dtz(board.chess_)
return dtz