The goal is to add the numbers in the selected line to the next line, horizontal or vertical. The result of adding numbers is always the remainder of the division by 10 (mod(10)).
When the rest of the addition is equal to zero we get points and the number is deleted.
- removal of several numbers in one move:
square of the number of deleted numbers x 10pts,
- removal of a full line of numbers: 100pts,
- promoted to the next level: 100pts.