1
6
5
8
4
5
4
2
8
8
4
1
5
3
8
2
1
9
4
7
1
5
9
2
4
8
5
9
7
4
1
2
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.
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.