- Code: Select all
+-------+-------+-------+
| . 4 . | . . . | . . 7 |
| 1 . . | 5 . . | . . . |
| . . . | . . 4 | . 8 . |
+-------+-------+-------+
| 5 . . | . . . | . 3 . |
| 2 1 . | . 4 7 | . . . |
| . . . | . 9 . | . . . |
+-------+-------+-------+
| . . . | . 8 3 | . . 4 |
| 7 . 5 | . . . | . . . |
| . . 8 | . . 9 | . 6 2 |
+-------+-------+-------+
.4......71..5..........4.8.5......3.21..47.......9........83..47.5........8..9.62
(source: sudoku architect)