Friday Puzzle #83 - Mystery Puzzle
Instruction-less puzzles have been used a few times at the World Puzzle Championship, and the biggest hurdle is always to have a clear enough example so that the solver can actually figure out what is on your mind. This often means "simple rules", but not always. This week, I offer my own attempt at a mystery puzzle type with no written instructions. Enjoy.
ETA: Circle in R2C1 of the example, as noticed by zotmeister.