3U Frame

### 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](https://www.puzzlehub.org/) aims to make available high-quality open-source models of many puzzle designs. All of our models are posted with the generous permi