The Chess Cave is a cave located in the Forest, inside a huge tree near the pond. It has trees that grow chess pieces in it, with the exception of the Knight, which grows in another area of the Forest. It can only be accessed once you reach Star Level 4, since the entrance is blocked by a metal gate that you need to incinerate using a Blowtorch. If you look carefully, you can see math equations flowing around the cave in green faint letters. In the cave you'll often hear echoing owl hoots and bug chirps.