PlaySudoku.us
Easy · Puzzle #245
5
8
4
6
2
1
7
9
3
2
4
1
6
5
8
2
6
7
9
4
9
7
2
3
2
6
4
5
8
9
4
9
8
2
1
6
1
8
4
6
2
3
4
5
6
2
9
1
3
7
8
"Not all those who wander are lost." — J. R. R. Tolkien
"Not all those who wander are lost." — J. R. R. Tolkien
Donald Knuth's "dancing links" algorithm — published in 2000 — is one of the fastest ways to solve Sudoku by computer.
Donald Knuth's "dancing links" algorithm — published in 2000 — is one of the fastest ways to solve Sudoku by computer.