Dacha Tactics #33 - king shows dark chops to hold draw!

White's bishop looks trapped. Is there a form of escape or is it simply over? Let's look at color $ -- both have light bishops, neither have dark. If there is hope -- it will be on dark. But how? Let's dig deep for underground dark resources...

Interact with the puzzle below. If you get stuck, you can always click the "lightbulb" icon in the lower-left of the puzzle frame. Good luck!