- Code: Select all
+-------+-------+-------+
| . . . | . 7 . | . . . |
| . . . | 8 . 9 | . . . |
| . . 5 | . 3 . | 6 . . |
+-------+-------+-------+
| . 1 . | 2 . 3 | . 4 . |
| 4 . 6 | . . . | 9 . 8 |
| . 2 . | . . 4 | . 5 . |
+-------+-------+-------+
| . . 7 | . 5 . | 3 . . |
| . . . | 4 . 8 | . . . |
| . . . | . 9 . | . . . |
+-------+-------+-------+
....7.......8.9.....5.3.6...1.2.3.4.4.6...9.8.2...4.5...7.5.3.....4.8.......9....
(Source: Sudoku Architect)

