PlaySudoku.us
Medium · Puzzle #345
3
6
5
4
8
5
7
1
9
4
6
1
7
8
9
2
6
4
1
5
2
9
4
8
3
2
7
4
6
5
2
4
"Education is not the filling of a pail, but the lighting of a fire." — W. B. Yeats
"Education is not the filling of a pail, but the lighting of a fire." — W. B. Yeats
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.