PlaySudoku.us
Hard · Puzzle #644
1
6
8
9
4
5
9
1
2
4
5
3
9
2
6
9
4
3
7
4
3
6
9
5
4
6
8
3
7
In 2005, Sudoku mania was so intense in the UK that it was credited with boosting pencil sales nationwide.
In 2005, Sudoku mania was so intense in the UK that it was credited with boosting pencil sales nationwide.
Try solving a Hard puzzle using only pencil marks — no digit entries until every candidate is mapped out.
Try solving a Hard puzzle using only pencil marks — no digit entries until every candidate is mapped out.