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Evil · Puzzle #722
1
7
6
4
5
1
6
6
1
3
9
4
7
2
8
6
5
6
7
9
3
7
2
5
Techniques used
- Naked Single
- Hidden Single
- Naked Pair
- Pointing Pair
- Box-Line Reduction
- XY-Wing
- W-Wing
- XY-Chain
"The infinite! No other question has ever moved so profoundly the spirit of man." — David Hilbert
"The infinite! No other question has ever moved so profoundly the spirit of man." — David Hilbert
"There is no permanent place in mathematics for ugly mathematics." — G. H. Hardy
"There is no permanent place in mathematics for ugly mathematics." — G. H. Hardy