PlaySudoku.us
Evil · Puzzle #579
3
8
2
5
4
4
6
1
5
2
7
9
6
5
8
7
7
3
4
1
7
5
9
8
Techniques used
- Naked Single
- Hidden Single
- Naked Pair
- Naked Triple
- Pointing Pair
- 2-String Kite
- XY-Chain
- XY-Wing
- UR Type 4
- Forcing Chains
- X-Wing
- W-Wing
"To know what you know and what you do not know — that is true knowledge." — Confucius
"To know what you know and what you do not know — that is true knowledge." — Confucius
After placing a digit, immediately check its row, column, and box for new naked singles.
After placing a digit, immediately check its row, column, and box for new naked singles.