On the Subject of Numbrix

Basically a number matrix. Which is just a matrix. Which is also a 2D set of numbers. Which is still just a matrix.

The module presents a 9×9 grid. Numbers are present in some of the squares in the grid.

To solve the module, fill in the grid with consecutive numbers from 1 to 81 so that they follow a horizontal or vertical path.

To input a number, first press the square to input, then input the number using your own keyboard. Note that leading zeroes are always omitted, and each square can only hold two digits.

Press backspace in your keyboard to reset the selected square. Press R in your keyboard to reset the whole grid.