Erik Demaine and Martin Demaine's Puzzles:

CSAIL Annual Meeting 2004 Puzzle

In what has become a regular event, Erik Demaine and Martin Demaine give out puzzles each year at our lab's Annual Meeting in July. Here is the 2004 edition.

This puzzle is related to the Checkered Origami Pattern series of puzzles by Serhiy Grabarchuk, and studied further by Kozy Kitajima, Sasaki Setsuo, and Hiroshi Yamamoto, which consider paper colored black on one side and white on the other (so lack the orientation constraints) and restrict to simple folds. See also a description by Tom Hull and current records.

[72dpi] [150dpi] [PDF]


Your goal is to fold the 5×5 puzzle into a 3×3 square so that just three CSAIL logos show. The logos should all be on one side, lie along a diagonal, and all be oriented the same way, aligned either horizontally or vertically. (See images in lower-left corner.) There are two puzzles: the vertical puzzle is harder. You may fold anywhere, but you may not cut.

Printing Notes

The puzzle was designed for color printing; it will work fine on a black-and-white printer, but will be a bit more challenging.

The PDF file is the best combination of printing quality and small file size. The PostScript file also has ideal printing quality, but the file is larger. In either case, you need a suitable viewer. Alternatively, you can print one of the images. If you can print images scaled to fit, use 150dpi. Otherwise, use 72dpi.


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Last updated August 9, 2017 by Erik Demaine.Accessibility