PlaySudoku.us
Expert · Puzzle #903
9
5
8
1
2
2
5
4
9
6
3
5
8
2
2
6
9
9
8
4
4
1
7
5
9
Techniques used
- Naked Single
- Hidden Single
- Naked Quad
- Box-Line Reduction
- X-Wing
- Naked Pair
- Naked Triple
- Pointing Pair
- XY-Wing
The minimum number of clues needed to create a valid Sudoku with a unique solution is 17.
The minimum number of clues needed to create a valid Sudoku with a unique solution is 17.
"Believe you can and you're halfway there." — Theodore Roosevelt
"Believe you can and you're halfway there." — Theodore Roosevelt