code: def probe_wdl(self, board: chess.Board) -> int:
          
          dtm = self.probe_dtm(board)
  
          if dtm == 0:
              if board.is_checkmate():
                  return -1
              else:
                  return 0
          elif dtm > 0:
              return 1
          else:
              return -1
docs: Probes for win/draw/loss-information.
  
          Returns ``1`` if the side to move is winning, ``0`` if it is a draw,
          and ``-1`` if the side to move is losing.
  
          >>> import chess
          >>> import chess.gaviota
          >>>
          >>> with chess.gaviota.open_tablebase("data/gaviota") as tablebase:
          ...     board = chess.Board("8/4k3/8/B7/8/8/8/4K3 w - - 0 1")
          ...     print(tablebase.probe_wdl(board))
          ...
          0
  
          :raises: :exc:`KeyError` (or specifically
              :exc:`chess.gaviota.MissingTableError`) if the probe fails. Use
              :func:`~chess.gaviota.PythonTablebase.get_wdl()` if you prefer
              to get ``None`` instead of an exception.
  
              Note that probing a corrupted table file is undefined behavior.