Puzzles designed by M. Oskar van Deventer, based on a puzzle concept by Igor Kriz, September 2008
This page is about a mathematics collaboration in the spirit of Martin Gardner. Igor Kriz illustrated group theory and the “sporadic simple” Mathieu 12 group in a Scientific American article by turning them into permutation puzzles. He challenged readers to find a mechanical implementation of his M12 puzzle. Oskar van Deventer took up the challenge resulting in two completely different implementations, “Topsy Turvy” and “Number Planet”. This page describes the development of those two implementations.
LaserExact offers a limited edition for EUR 315 plus shipping until 21 June 2010.Read more at the Twisty Puzzles Forum, or order the puzzle directly from LaserExact (Hans van der Zon) at email@example.com.