gistfile1.txt

    def has_won(self, player):
        mark = player.mark
        size = len(self.board[0])

        horiz = any(all(slot == mark for slot in row) for row in self.board)
        vert = any(all(row[col_idx] == mark for row in self.board) for col_idx in range(size))
        diag1 = all(self.board[i][i] == mark for i in range(size))
        diag2 = all(self.board[i][size - i - 1] for i in range(size))
        return horiz or vert or diag1 or diag2