PlaySudoku.us
Expert · Puzzle #643
6
9
2
8
7
9
6
3
4
6
3
1
7
5
1
7
8
8
3
5
6
3
9
Techniques used
- Hidden Single
- Naked Triple
- Naked Single
- Skyscraper
- Box-Line Reduction
- XY-Wing
There are Sudoku World Championships held annually, with competitors from over 30 countries.
There are Sudoku World Championships held annually, with competitors from over 30 countries.
"The more I read, the more I acquire, the more certain I am that I know nothing." — Voltaire
"The more I read, the more I acquire, the more certain I am that I know nothing." — Voltaire