PlaySudoku.us
Expert · Puzzle #42
9
8
1
6
7
1
7
5
2
8
9
6
7
5
8
2
5
4
1
7
6
2
4
8
Network flow algorithms can solve special classes of Sudoku more efficiently than general backtracking.
Network flow algorithms can solve special classes of Sudoku more efficiently than general backtracking.
"When you've got something to prove, there's nothing greater than a challenge." — Terry Bradshaw
"When you've got something to prove, there's nothing greater than a challenge." — Terry Bradshaw