Overgrown: free puzzle app for iphone, ipad

Overgrown is a chess-like puzzle game.  The object is to place the tree roots to fill up the grid with roots. Some trees act like rooks, others like queens.  Still others act like a combination of the two - 1 diagonal and horizontal.

The graphics are really quite good.
The game reminds me an awful lot like Combination, a game from about 3 years ago.
https://itunes.apple.com/us/app/id1005591295