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Evil · Puzzle #581
3
6
7
3
2
8
9
6
1
8
6
3
1
8
9
2
7
9
8
7
5
4
2
8
7
4
Techniques used
- Naked Single
- Hidden Single
- Naked Triple
- Pointing Pair
- Skyscraper
- XY-Chain
- Forcing Chains
- X-Wing
- W-Wing
- 2-String Kite
- XY-Wing
- Simple Coloring
- Naked Pair
- Naked Quad