What are the special matches?
The Four-of-a-kind Special Match creates a burst of flame that shoots out from both ends of the match. This can be counter intuitive for Candy Crush veterans since it is essentially opposite the way Striped Candies work. The flame will damage obstacles, but also has the interesting effect of destroying level 1 peppers, while concentrating higher level ones.
Warning – Be careful when using the Four-of-a-kind Special Match, as it can easily scramble other matches you had lined up. It is also best to use when you have higher level peppers lined up, since the level 1 peppers are destroyed and get no benefit from the flame.