Pro Tip

Box-Line Reduction: if all candidates for a digit in a row or column are within one box, eliminate that digit from the rest of the box.

Pro Tip
✓ Completed! 👍
8
5
9
6
4
1
3
6
4
5
9
4
9
5
8
1
6
3
2
9
2
9
7
8
5
1
6
2
1
8
4
3
5
8
9
6
4
7
1
6
1
5
7
3
7
8
3
4
6
2
Did You Know?

The 9×9 Sudoku grid contains exactly 9 rows, 9 columns, and 9 boxes — each a 'house' — giving 27 houses in total.

Did You Know?