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Evil · Puzzle #662
6
4
6
1
7
9
1
5
6
4
8
5
7
5
9
3
6
4
2
6
3
8
7
8
3
Techniques used
- Hidden Single
- Naked Pair
- Naked Single
- Pointing Pair
- Pointing Triple
- X-Wing
- XY-Wing
- Naked Triple
- Box-Line Reduction
- XY-Chain
- W-Wing
"Science is the great antidote to the poison of enthusiasm and superstition." — Adam Smith
"Science is the great antidote to the poison of enthusiasm and superstition." — Adam Smith
"Beauty is the first test: there is no permanent place in the world for ugly mathematics." — G. H. Hardy
"Beauty is the first test: there is no permanent place in the world for ugly mathematics." — G. H. Hardy