PlaySudoku.us
Medium · Puzzle #310
9
6
1
2
5
8
6
3
2
5
1
3
2
6
4
8
9
1
7
9
2
8
6
8
3
5
6
2
1
5
9
2
4
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.
If you're stuck, look for Pointing Pairs: two candidates in a box that share a row or column.
If you're stuck, look for Pointing Pairs: two candidates in a box that share a row or column.