From: Dave Burt <dave@...>
Date: 2005-04-15T06:29:35+09:00
Subject: Re: [SUMMARY] Knight's Travails (#27)

Hey, that is very cool. I really enjoyed reading this summary, and the code 
is really beautiful, Matthew.

I liked this very much - args was nicely processed beforehand:
    if args.any? { |c| not c.valid? }

The simplicity of the Tile class reminded me of Douglas Livingstone's Fixnum 
playing cards.