PlaySudoku.us
Evil · Puzzle #603
5
4
6
9
5
1
6
4
6
7
5
3
5
7
8
2
3
5
1
8
2
3
8
4
Techniques used
- Hidden Single
- Naked Pair
- Naked Triple
- Naked Single
- Naked Quad
- Pointing Pair
- Box-Line Reduction
- 2-String Kite
- XY-Chain
- UR Type 1
- Forcing Chains
- Swordfish