Erik Demaine and Martin Demaine's Puzzles:

CSAIL Annual Meeting 2007 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 June. Here is the 2007 edition.

Two-page PDF (print duplex, flipping on short edge)

Front side:
TOP

[72dpi] [150dpi] [PDF] [PostScript] 		Back side:
TOP

[72dpi] [150dpi] [PDF] [PostScript]

Rules

Your goal is to fold the 8 × 16 rectangular piece of paper into an 8 × 8 square such that both sides show a perfect 8 × 8 checkerboard. You may fold anywhere. You may not cut aside from the existing slit in the middle of the paper. Note that the puzzle should be preslit in the middle between coordinates (4,4) and (12,4), as indicated by the arrows on the back.

Printing Notes

This puzzle requires printing images on both sides with fairly close alignment. This can require some fiddling with your printer or photocopier.

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

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.

Last updated June 3, 2008 by Erik Demaine.