Lisa heard about Chaos Tiles by Ed Pegg Jr. on NPR a few years ago and ordered it. You can really see Ed’s mathematical skills come through when the directions to the game involve validating moves by examining the angle one piece has with another (any play that makes a 20 degree angle is illegal!).
Other than the fantastic ‘bakelite’ pieces, the game is pretty lacking. About the only time the pieces see the light of day is to get them out for the younger crowd to play with like a puzzle. To add insult to injury, getting them back in the 9-sided box requires a cheat-sheet and about 15 minutes of silent meditation.