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Evil · Puzzle #663
3
2
5
7
4
6
2
1
7
6
8
2
4
9
3
4
8
9
5
3
5
1
8
Techniques used
- Hidden Single
- Naked Pair
- Naked Single
- Pointing Pair
- Skyscraper
- XY-Chain
- Box-Line Reduction
- X-Wing
- Forcing Chains
- W-Wing
- XY-Wing
- Simple Coloring
- Naked Triple