Checkerboard Puzzle Hint

diagonal checkerboard puzzleWithout giving away the whole thing, here's the crease pattern you need and the order in which you have to make the folds. This solution was discovered by Kitajima-san and Hiroshi-san. I learned it from a presentation given by Nobuyuki Yoshigahara at the Third Gathering for Martin Gardner Conference, January 1998, held in Atlanta, GA.

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