This note does not contain major spoilers for the book.

This is the strange murder at the chess club during the simultaneous blindfold game.

I'd rank it as one of the good ones. It's also the one that opens with the ceremonial burning of Webster's Third for claiming that "imply" and "infer" can be used interchangeably.

I never have any luck figuring out what's going on, so the more Nero and Archie talk about it cryptically the less happy I am. I don't recall there was much in this one.