Rules: Place a digit from 1-7, or blacken in each cell such that each digit appears exactly once in each row, column and marked 3×3 box. There will be 2 blackened cells in each row, column and 3×3 box. Numbers outside the grid indicate the total of cells between the blackened cells in the corresponding direction.
Background: This is one of my design. Actually, it is Smashed Sums + Sudoku.
Example:
Reklamlar
Sir,
Its really difficult to crack this type of Sudoku.Can you please tell me some tips on how to do it.I am really interested in this type of Sudoku.
Thank You.