PlaySudoku.us
Expert · Puzzle #599
7
5
1
8
4
7
5
3
2
1
5
4
8
5
7
9
2
3
8
3
2
6
4
3
1
8
7
9
Techniques used
- Naked Single
- Hidden Single
- Naked Pair
- Naked Quad
- Pointing Pair
- Pointing Triple
- Box-Line Reduction
- XY-Wing
"Luck is what happens when preparation meets opportunity." — Seneca
"Luck is what happens when preparation meets opportunity." — Seneca
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.