PlaySudoku.us
Easy · Puzzle #620
6
2
9
7
8
5
9
6
8
7
3
1
2
1
3
2
9
6
5
4
9
6
7
6
8
3
1
8
6
4
2
4
8
1
2
6
7
5
3
1
5
9
1
8
3
Donald Knuth's "Algorithm X" with dancing links solves exact cover problems — of which Sudoku is a special case.
Donald Knuth's "Algorithm X" with dancing links solves exact cover problems — of which Sudoku is a special case.
"The greatest glory in living lies not in never falling, but in rising every time we fall." — Nelson Mandela
"The greatest glory in living lies not in never falling, but in rising every time we fall." — Nelson Mandela