Card trick by John Conway

 From:  Frenchy Pilou (PILOU)
Another headache !
My first try but not finalized :) Notice the use of the new Browser function ;) It's him the father of the Game of Life! Try this amazing one!

Card trick photo is from here :
(you have a paper about the mathematical Conway pencils headache ; )

EDITED: 22 Apr 2009 by PILOU