PlaySudoku.us
Evil · Puzzle #634
5
2
6
9
7
2
7
5
4
5
1
9
4
6
6
1
2
8
4
5
1
4
9
8
9
7
2
Techniques used
- Hidden Single
- Naked Pair
- Naked Triple
- Pointing Pair
- 2-String Kite
- Forcing Chains
- Naked Single
- X-Wing
- XY-Chain
Some Sudoku apps use neural networks to grade puzzle difficulty — training on millions of human solve attempts.
Some Sudoku apps use neural networks to grade puzzle difficulty — training on millions of human solve attempts.
"Be yourself; everyone else is already taken." — Oscar Wilde
"Be yourself; everyone else is already taken." — Oscar Wilde