The 2x3x3 cuboid is a customization of a 3x3x3 puzzle. The resulting puzzle is identical in complexity and rotations to a Rubik's Domino. The method to customly build cuboids from bigger puzzles was invented by Tony Fisher and is described in great detail by Dieter Gebhardt in an article available on this website. This created the misconception that Tony Fisher created a 2x3x3 that does not look like a Domino but a true cuboid. But Tony never used his method to build a 2x3x3. The first person to do it is therefore unknown.
Build Your Own Instructions on constructing a 3x3x2 or a 3x2x2 cuboid around a 3x3x3 kernel can be found here.
Rubik's Puzzle Building Ton Dennenbroek has created a great set of tutorials on puzzle building, inlcuding one for this puzzle.
Thank you to the following people for their assistance in helping collect the information on this page: Joshua Bell.
This puzzle can be found in collections of these members: