I like the categories to be solved after the sorting... I think these would be good for the first 2 games of OC; but as for a grid/board, I don't really like these kinds where the whole board is full of names or birds or colors or whatever.

You can't get a foothold. Too many possibilities. For instance, I knew IREOF but the permutations were exhaustive...

Still, I appreciate your groupings. Well done.

I think it'd be great if we could have our PuzzGrid write some app to simulate the first rounds. And the missing vowels too! ;)

This is very good indeed. (Apart from a minor gripe of which words it accepts for the Flamingo and Partridge groups)

A clever grid, but I’d never heard these golf terms.