3U Frame

Three simple U's which are interlocked can form an interesting puzzle cage. The challenge is to accommodates four hexacubes forming a 3x3x3 cube where the holes are not visible. Beware for this level 15 puzzle with only two solutions called 3U Frame.

Printing Instructions

Print one of each piece. After print assemble the frame. Use the 2 square dowels to conect the 3rd U through the holes of the first. Be careful to use the right “handedness” when assembling. The image should make it clear what is the right way. Once the frame is assembled you are all ready for puzzling. Glue the pieces in place. Depending on your print settings the dowels might be a tight, deburr them and try to rotate thym by 90° to get a good fit.

Difficulty

3 out of 5

The Printable Puzzle Project

The Printable Puzzle Project aims to make available high-quality open-source models of many puzzle designs. All of our models are posted with the generous permission of their designers and are licensed for non-commercial use only. Anyone may print copies for their own personal use, but selling or otherwise monetizing them is not permitted, and puzzle designers retain all rights as copyright holders of their work.

Our puzzles are modeled using the open-source puzzlecad library. The .scad file is included with this model in case you want to modify any of its design parameters; more information on how to do this can be found in the PPP Puzzle Modeling tutorial.

The "No Problem Puzzle Collection" contains many puzzles with complicated boxes that would be too hard to model using open-scad. Additionally the original design files for the boxes have been lost due to a hd-fault. That is why these puzzles only contain scad-files for the pieces.

About The Designers

From November 2020 to April 2023 Theo Geerinck and Symen Hovinga collaborated under the trading name of "No Problem Puzzles" to design and produce their puzzles. Many of their unique packing puzzles introduce fascinating features such as moving or sliding doors and elements. These features and the way they behave always add a playful new dimension to the more familiar exercise of packing shapes. Those puzzles could once be purchased through an online printing service. Alternatively, for those who owned a 3D printer the files could be obtained from Symen.

However, after the tragic loss of Symen, purchases through the ‘No Problem Shop’ was no longer possible. Therefore, Theo decided to publish the designs so that everybody can create 3d-printed copies to be enjoyed for personal use.