"Pigeon chess" or "like playing chess with a pigeon" is a figure of speech originating from a comment made in March 2005 on Amazon by Scott D. Weitzenhoffer regarding Eugenie Scott's book Evolution vs. Creationism: An introduction:
“”Debating creationists on the topic of evolution is rather like trying to play chess with a pigeon — it knocks the pieces over, craps on the board, and flies back to its flock to claim victory.
As such "debating techniques" are not limited to creationists, the phrase has entered the general Internet lexicon, together with the source quotation, which is sometimes cited as an anonymous "Internet law". The reference to creationists is usually replaced with whatever group the user is arguing with.
Andrew Schlafly was similarly described for his contributions to Usenet talk.origins in 2002: "I tried it for a while, but arguing with Andy is like playing chess with a small child who doesn't know the rules."