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Evil · Puzzle #980
6
7
9
2
3
7
5
8
8
2
9
6
5
8
9
4
3
9
5
6
8
8
6
7
5
Techniques used
- Naked Single
- Hidden Single
- Naked Pair
- Naked Triple
- Naked Quad
- Pointing Pair
- XY-Wing
- Skyscraper
- Box-Line Reduction
- Finned X-Wing
- Forcing Chains
- X-Wing
- XY-Chain