Put a mine in some blank squares. Each letter stands for a different number, which indicates how many mines are in the horizontally, vertically, and diagonally adjacent squares. The code will differ from puzzle to puzzle.
1. | 2. | 3. | 4. | 5. | 6. |
7. | 8. | 9. | 10. | 11. |
12. | 13. | 14. | 15. | 16. |
17. | 18. | 19. | 20. |