-------------------------------------
|     3     | 1         | 7       5 |
|   +   +   +   +   +   +   +   +   |
| 9         |           | 1         |
|   +   +   +   +   +   +   +   +   |
|     5   1 |     9     |         8 |
|---+---+---+---+---+---+---+---+---|
| 8         |           |     7     |
|   +   +   +   +   +   +   +   +   |
| 5   4     |     6     |         3 |
|   +   +   +   +   +   +   +   +   |
|     7     | 5       9 | 2         |
|---+---+---+---+---+---+---+---+---|
|           | 4         |     8     |
|   +   +   +   +   +   +   +   +   |
|           |           | 3   6   2 |
|   +   +   +   +   +   +   +   +   |
|     8     |           |           |
-------------------------------------

          DIFFICULTY: 0.00