PlaySudoku.us
Hard · Puzzle #159
5
3
2
6
5
9
7
4
7
3
5
8
8
6
9
4
1
6
8
4
3
5
2
9
6
3
5
9
4
There are Sudoku variants with extra constraints: Killer Sudoku (cage sums), Diagonal Sudoku, and even 3D Sudoku.
There are Sudoku variants with extra constraints: Killer Sudoku (cage sums), Diagonal Sudoku, and even 3D Sudoku.
"Opinion is the medium between knowledge and ignorance." — Plato
"Opinion is the medium between knowledge and ignorance." — Plato