The Plain

1. Your first step is to map the plain.
2. The northwest corner, or lack of it, is the only irregularity.
3. It's the key to the puzzle.
4. Once you maneuver the green eyed rock through the diagonal, you can trap the brown eyed rock. In chess, this is called "gaining a tempo."
5. If you get close enough, the brown eyed rock will become mesmerized by the presence of the green eyed rock.