By the way, I have some additional information about the online Set game at < http://www.nytimes.com/ref/crosswords/setpuzzle.html >. I had thought there were 4 levels of play, but an employee of PUZZL.COM (which created the online version) just e-mailed me to say that, in fact, there is no difference between the algorithms by which game 3 and game 4 are chosen. (Ditto for the easier pair, game 1 and game 2.) --Dan _____________________________________________________________________ "It don't mean a thing if it ain't got that certain je ne sais quoi." --Peter Schickele