PlaySudoku.us
Evil · Puzzle #186
8
7
2
9
6
9
5
7
7
8
4
1
3
2
6
3
2
6
1
2
9
3
1
Techniques used
- Hidden Single
- Pointing Pair
- Box-Line Reduction
- 2-String Kite
- Forcing Chains
- Naked Single
"God made the integers; all else is the work of man." — Leopold Kronecker
"God made the integers; all else is the work of man." — Leopold Kronecker
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.