Teachers are able to hide their grids from the general public.

Not great, a couple of interesting ideas,but needs editing, to be valid, and needs more variety to be interesting. Two groups are two similar, need an encyclopedic knowledge of the play to differentiate them, and really to be a mindreader. In fact bthey could be separated into two different, equally valid (arguably slightly better)groups - characters who die in the play and those who don't. The other two groups are obvious to sort from each other, but impossible to find the right terminologies for the link.

@dogma That's harsh, but pretty true. I don't get how Paris and Mercurtio count as 'neutral'.

Why not just 16 clues for Deus ex Machina or some other concept? This brought back horrid memories of my Shakepeare professor at uni who was an etymologist and didn't care about storylines, the beauty of the speeches, or anything but niche trivia. This is academic narcissism taken to a new height to produce a new low. Horrid.