You have......

For example.....

A 9x9 grid.

The 9x9 is split up into a 9 3x3 grids.

Within each 3x3 grid you have to have all of the digits 1-9. Each digit only appears once.

Within each row and column of the 9x9 grid, you have the digits 1-9. Each digit only appears once.

Solved by logical deduction.

Posted By: BeverlyHills0201, May 18, 16:41:30