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Loyd's Lunacy

Appeared in Volume 7/1, February 1994

An oldy from 19th Century mathematician Sam Loyd, with thanks to Chip Moody.

Here is a configuration of blocks:

It consists of 2 horizontal rectangles, 4 vertical rectangles, 2 small squares, and 1 large square. The white space represents empty space. A block can be moved if one whole side of it is directly adjacent to empty space. For example, 2 possible moves from the above configuration are:

Your goal: Move the large square from the upper right hand corner to the upper left hand corner in the fewest possible moves. A solution can be found in 83 moves. The solution is available upon request.

Eric Iverson
iverson@crl.nmsu.edu
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