Sudoku HintHow it works
Look for a cell within a row, column, or block where a specific number can only fit in one place.
If there's only one cell that can contain a particular number, that number is determined for that cell.
Example
1
2 4
3
2 4 9
2 7 9
5
6
8
2 9
Common mistakes
Check every empty cell in the chosen row, column or block. A number must have only one possible position there.