PlaySudoku.us
Expert · Puzzle #741
7
6
2
3
5
3
4
7
2
1
5
4
2
7
9
7
3
9
1
7
6
5
2
1
Techniques used
- Hidden Single
- Naked Pair
- Naked Single
- Naked Triple
- Naked Quad
- Pointing Pair
- Box-Line Reduction
- XY-Wing
- XY-Chain
"The hardest game to win is a won game." — Emanuel Lasker
"The hardest game to win is a won game." — Emanuel Lasker
"It is impossible to be a mathematician without being a poet in soul." — Sofia Kovalevskaya
"It is impossible to be a mathematician without being a poet in soul." — Sofia Kovalevskaya