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139 Burr

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139 Burr.jpg
139 Burr by Jerry McFarland
Photo courtesy of Bill Cutler
Name
139 Burr
Designer
Manufacturer
Dimensions
4.0 x 4.0 x 4.0"
Year
1989
Cost
$35
Availability
Occasionally Available
Type
# of Pieces
6
Material
Red Oak
Objective
Disassemble and reassemble the 6 piece burr
IPP Exchange
Puzzle
IPP10 (August 1989 - London)

"When analyzing a puzzle to see if it comes apart, one has to keep track of all the different 'states' to which the pieces can be shifted. While running the computer analysis of all 6-piece burrs, I kept track of the largest number of states that a 6-piece burr could have without coming apart. That number is 139. I took the simplest of these designs and told Jerry McFarland to make it. He came up with a great way to construct it. This was my souvenir puzzle at the 10th International Puzzle Party." -Bill Cutler