PlaySudoku.us
Easy · Puzzle #667
8
3
2
4
6
7
5
5
1
3
7
2
6
8
6
9
7
2
5
1
3
3
1
2
6
4
7
5
9
1
6
2
2
1
6
5
9
5
1
7
4
6
9
2
1
8
Nikoli, the Japanese puzzle company that popularized Sudoku, requires all their puzzles to be created by hand — no computers.
Nikoli, the Japanese puzzle company that popularized Sudoku, requires all their puzzles to be created by hand — no computers.
After finishing any puzzle, go back and find every naked pair and hidden single you used. Catalog your techniques.
After finishing any puzzle, go back and find every naked pair and hidden single you used. Catalog your techniques.