Fully Functional 3x4x4 Puzzle

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Idea Conceived

Prototype finished


Original concept

Core puzzle



16th March 1997

8th February 1998


Tony Fisher

4x4x4 Master Cube / Rubik's Revenge

9.7 x 13 x 13 cm / 3.8 x 5.1 x 5.1 inch


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This was my second Cuboid puzzle. Eastsheen Cubes weren't out yet so I used a 4x4x4 Master Cube / Rubik's Revenge. The add-on pieces were virtually solid and cast from polyester resin. Remeltable rubber (Gelflex) was used for the moulds. The resulting puzzle I made in 1998 is even more enormous and heavy than my original 3x3x4. Looking back I recall that many of the Master Cube pieces broke during the making of this puzzle. This was due to stress that the weight caused and simply trying to assemble it. It's one of those many puzzles which had me tearing my hair out. At that time there were very few people transforming puzzles and I had no contact with any of them. Everything I did was self taught.
For colouring I used standard Rubik's Cube type stickers.
As stated this puzzle is fully functional. However it does not change shape since it doesn't obey the cuboid shape changing rule-
"A cuboid is capable of shape changing where ( two or more edge unit lengths are different and odd ) or ( two or more edge unit lengths are different and even ) excluding cuboids with a side of one."
In total I have made eleven fully functional cuboids. They are-
2x2x3 (micro), 2x2x4, 2x2x6, 2x2x7, 2x3x4, 3x3x4 (large), 3x3x4 (medium), 3x3x5, 3x4x4, 4x4x5, 4x4x6, 5x5x6.
In 2014, over 16 years since mine a factory made version was finally released. I had nothing to do with it though.

3x3x5 fully functional cuboid