def __init__(self,
board: Board,
max_restarts: int,
max_iter: int,
stop_if_found: bool = False):
"""
:type board: Sudoku board in initial state
:type max_restarts: max number of restarts
:param max_iter: Maximal number of iterations the solver runs
"""
self._board = board
self._max_iter = max_iter
self._max_restarts = max_restarts
self._stop_if_found = stop_if_found
# get size of the board
self._board_size, _ = board.bounds()
self._results = []
