PlaySudoku.us
Medium · Puzzle #426
7
2
6
6
4
7
5
1
1
5
6
8
3
7
2
3
5
1
1
3
8
9
7
2
7
5
4
5
9
1
2
4
8
3
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.