Numbers
Go to the LEAK Family Tree
Then there was Maths.
Later, there was Sudoku.
| 1 | 9 | 5 | 6 | 2 | 7 | 8 | 4 | 3 |
| 6 | 2 | 7 | 8 | 4 | 3 | 1 | 9 | 5 |
| 8 | 4 | 3 | 1 | 9 | 5 | 6 | 2 | 7 |
| 2 | 7 | 6 | 4 | 3 | 8 | 9 | 5 | 1 |
| 4 | 3 | 8 | 9 | 5 | 1 | 2 | 7 | 6 |
| 9 | 5 | 1 | 2 | 7 | 6 | 4 | 3 | 8 |
| 3 | 8 | 4 | 5 | 1 | 9 | 7 | 6 | 2 |
| 5 | 1 | 9 | 7 | 6 | 2 | 3 | 8 | 4 |
| 7 | 6 | 2 | 3 | 8 | 4 | 5 | 1 | 9 |
Then ................
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