What is a blackboard if not to play with i100?
To place the numbers, that will be added simply by touching the
csella want, you ought to respect two simple rules:
1) To insert a number in horizontal or vertical, allow two
empty boxes than the box is located in the last number;
2) To insert a number diagonally you must leave one box
empty.
The button "Reset" will serve to start a new game, erasing
all the numbers already placed.