Dynamite is a super piece that you can get by matching five pieces in an L or T shape. If you match Dynamite with basic pieces of the same color, it will destroy pieces in a 3x3 square, then drop down into the vacant space and destroy another 3x3 square. You can also match Dynamite with a Firework of any color. If you do that, they will destroy 3 vertical columns and 3 horizontal rows.