PlaySudoku.us
Expert · Puzzle #476
3
1
2
8
9
3
5
7
7
8
5
4
9
8
6
5
2
4
6
8
3
2
9
4
3
Techniques used
- Naked Single
- Hidden Single
- Naked Quad
- Pointing Pair
- XY-Wing
- 2-String Kite
- Pointing Triple
- UR Type 4
- XY-Chain
- Naked Pair
- Skyscraper
- Naked Triple
- X-Wing