The Key by Pit Khiam Goh (2004) by Walter Hoppe

This is a very cool design by Pit and nicely made by Walter.

Here’s Bill’s Description:

“The Key Puzzle is a 2-dimensional version of the Binary Burr. Pit Khiam has been using BCPBOX and other programs to develop high-level burrs. When I came up wth the idea for the Binary Burr, he quickly came up with this 2-dimensional puzzle which uses the same principle.

This was my souvenir puzzle at the 24th International Puzzle Party.”