PlaySudoku.us
Expert · Puzzle #118
7
5
1
9
6
4
7
6
2
1
3
6
1
8
4
5
2
3
8
4
5
3
1
8
3
Techniques used
- Naked Single
- Hidden Single
- Naked Pair
- Box-Line Reduction
- X-Wing
- XY-Wing
- XY-Chain
- Naked Triple
- Pointing Pair
Sudoku can be expressed as an integer linear program — a branch of optimization mathematics used in logistics and finance.
Sudoku can be expressed as an integer linear program — a branch of optimization mathematics used in logistics and finance.
"In the middle of every difficulty lies opportunity." — Albert Einstein
"In the middle of every difficulty lies opportunity." — Albert Einstein