Digital-Puzles – Ronnay Clark

Digital-Puzles is a mathematical game similar to Tetris. The 6х9 playing field is being filled with cubes with digits from 1 to 9. Your task is to liberate the field from the cubes that disappear if the sum of the adjacent cubes is equal to or multiple of 10.
The game has 7 modes:
The cubes disappear if the sum of any quantity of the cubes is divisible by 10 horizontally.
The cubes disappear if the sum of 2 cubes is equal to 10 horizontally or vertically.
The cubes disappear if the sum of 3 cubes is multiple of 10 vertically or horizontally.
The cubes disappear if the sum of 4 cubes is multiple of 10 vertically or horizontally.
The cubes disappear if their amount in any 2×2 square is multiple of 10.
The cubes disappear if their amount in any 2×3 rectangle is multiple of 10.
The cubes disappear if their amount in any 3×3 square is multiple of 10.
As in Tetris the falling speed of the cubes is constantly increasing.