FINALLY just passed this level! You need to "lure" the cloud around the top left block by making matches on the board below. It moves counter-clockwise so 1st you want to make a match by swiping your match upward so that it moves up one black. Then you want to make a match by swiping left, so it moves to the left, then…
Thank you so much for your help. I haven't passed it yet, but your advice has been tremendous for getting that bugger of a cloud out onto the main board.