PlaySudoku.us
Easy · Puzzle #706
1
6
9
2
4
8
2
3
7
9
6
5
3
5
8
6
7
3
4
9
2
2
6
5
8
4
1
8
8
5
3
2
7
7
9
2
4
5
8
6
3
6
4
2
8
5
9
1
"If you want to be happy, be." — Leo Tolstoy
"If you want to be happy, be." — Leo Tolstoy
Set theory provides the formal foundation for Sudoku's rules: each digit must appear exactly once per set.
Set theory provides the formal foundation for Sudoku's rules: each digit must appear exactly once per set.