PlaySudoku.us
Evil · Puzzle #427
3
8
6
1
5
2
7
8
3
4
9
9
8
7
4
5
3
8
2
1
8
2
5
6
9
Techniques used
- Naked Single
- Hidden Single
- Pointing Triple
- Naked Quad
- Pointing Pair
- 2-String Kite
- Forcing Chains
- Naked Pair
- XY-Wing
- Naked Triple
- X-Wing
- XY-Chain
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 chess, as in life, a man is his own most dangerous opponent." — Vasily Smyslov
"In chess, as in life, a man is his own most dangerous opponent." — Vasily Smyslov