Download and and keep files in same directory Open "index.html" - file and enjoy
While coding this I used Chrome, I can not vouch for the functionality if you choose to use other browsers

• You can select panels and enter the wanted value.

• You can navigate through the table via Arrow Keys (Array wraps around)

• You can log the field via the button. This will result in a array representation of the game field which is being printed onto the console

• You can load pre existing grids
  ** Use the same dimension for this to work **

• or You can just solve an empty one

I still studying the O-Notations therefor the performance is shit

If you just creating a simple sudoku with empty values:
My setup had no problems of solving the following grid sizes

n = {1, 2, 3, 4}

Havent Checked if other grid sizes will resolve a given sudoku but it should

The Interval functionality only works for "solvable" without using brute force