Thank you for the encouragement. This one's been through a few drafts. The original version was MUCH easier and posted for a less intense audience, and used lots of cliches (shadows getting shorter at noon, chess knight described as a person, etc.)
I'm still not entirely happy with the last one. For one thing, knights are knighted with the flat of a blade, not, generally speaking, the tip. For another, it doesn't make a neat rhyming couplet. I'd be happy to hear suggestions!