PlaySudoku.us
Medium · Puzzle #193
5
7
2
9
8
5
7
2
9
3
5
9
7
4
6
9
2
6
8
7
6
9
8
4
2
9
5
1
4
3
4
6
2
5
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 mind is not a vessel to be filled, but a fire to be kindled." — Plutarch
"The mind is not a vessel to be filled, but a fire to be kindled." — Plutarch