That's the thing with problem creation, it becomes either too easy or too difficult. (Not saying that this one is way too easy) I recollect someone suggesting

That's the thing with problem creation, it becomes either too easy or too difficult. (Not saying that this one is way too easy) I recollect someone suggesting letting bots(AI) play a number of variations of the game first and then use the outcome to ascertain the difficulty - may be an overkill for a fun game like this?