The goal of level 81 is the chained piece at the very top of the field. The best strategy here is to acquire three Lightning power-ups to destroy it. Two of them are already present on the game field, you just need to unearth them. The easiest way to get your hands on them is to use bombs. While doing so, don’t forget to pay attention to the top part of the game field – some particularly good matches may appear there, allowing you to create a bomb just by the chained piece. Destroying the chain this way will make the level almost twice as easier! If you fail to use your bombs to destroy the chain, try to charge up your own Lightning power-up.
Once you’ve got rid of the chain and unearthed the Lightning power-ups on the two sides of the game field, use them to clear the silver and golden tiles. It is very hard to get right colored pieces next to the Lightnings, so instead make a few matches near the top tile until you get the color you need there.
You should also check out this video that shows how we got through level 81.