You can combine Special Rockets, Bombs and Chilis for more powerful effects. If two or more Specials are touching, they will automatically be combined when tapped on.
Rocket + Rocket
Combining two Rockets blasts an entire row and column from the tapped tile's location.
Rocket + Bomb
Combining a Rocket and Bomb blasts three rows and columns from the tapped tile's location.
Rocket + Chili
Combining a Rocket and Chili changes all Cubes of the Chili's color into Rockets and detonates them.
Bomb + Bomb
Combining two Bombs creates and detonates a large Bomb that blasts everything within a 7x7 radius.
Bomb + Chili
Combining a Bomb and Chili changes all Cubes of the Chili's color into Bombs and detonates them.
Chili + Chili
Combining two Chilis blast the entire board.