Convolution blockhead - design by Stewart Coffin 4x4x4 cube

What an interesting and difficult puzzle designed by Stewart Coffin. 7 complex pieces will assemble sequentially to form a 4x4x4 cube. I like this one alot. Really tests the spatial relationship skills. You will likely feel like a blockhead after working hours to solve this one. Measures about 2 3/4" cube.Excellent fits on this puzzle make it challenging to even dis-assemble, but of course the real challenge is in the assembly.

Diagonal Cube, Designed by Stewart Coffin, Made by Allen Rolfs

Wooden Cube Puzzle - Hong Kong

Convolution - Interlocking puzzle by Stewart Coffin (STC #30) by

PuzzleMad: 2012

PuzzleMad: A Bountiful Bonanza of Beautiful and Positively

Convolution - Interlocking puzzle by Stewart Coffin (STC #30) by

PuzzleMad: 2012

June 2012 - PuzzleMad

PuzzleMad: 2012

Blockhead Wood Puzzle from Creative Crafthouse - Solution

Wooden Cube Puzzle - Hong Kong