PlaySudoku.us
Easy · Puzzle #16
7
9
5
8
2
7
2
4
3
6
1
9
2
9
3
1
5
4
5
3
6
2
6
7
5
9
7
9
2
4
6
8
8
2
6
4
7
1
7
8
4
2
4
1
5
2
7
"Without music, life would be a mistake." — Friedrich Nietzsche
"Without music, life would be a mistake." — Friedrich Nietzsche
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.