Augmented Four Corners - Interlocking puzzle by Stewart Coffin (STC #34)

thingiverse

## ## Augmented Four Corners ### Interlocking puzzle by Stewart Coffin (STC #34) Assemble the six pieces into the polyhedral shape shown in the photo. _Augmented Four Corners_ is a variation on Coffin's earlier design [Four Corners](https://www.thingiverse.com/thing:4171807). It has a similar shape, but the assembly is considerably more difficult. In Coffin's words: "To convert _Four Corners_ from a polyhedral sculpture into more of an assembly puzzle, blocks are added to the corners to create six dissimilar pieces with only one solution and one sliding axis." ### Printing Instructions Print one copy each of `coffin.augmented-four-corners.pieces.stl` and `coffin.augmented-four-corners.tips.stl`, each in a different filament color. You will need to use build-plate supports for `coffin.augmented-four-corners.pieces.stl`. Supports are needed only along the base of the diagonal, and should not leave scars or interfere with the fit of the puzzle. Be sure to use a support overhang threshold of less than 45 degrees to ensure that supports are generated only at the base and not along the sides of the diagonal. This model uses "snap joints" so that it can be printed with the desired color scheme. After you print it, first connect all the joints before attempting to solve the puzzle. Snap each male connector into a corresponding female connector (for example, the male connector labeled "A" should connect to the female connector with a matching "A" label on the interior). The joints are designed to be tight, and depending on the printer and filament used, you may need to hammer them into place. If they come out too loose, a drop of superglue will make them more solid (in most cases this shouldn't be necessary, but unfortunately tolerances vary across printers and filaments). The snap joint concept is discussed further in this tutorial: [Getting Started with Puzzle Printing](https://www.puzzlehub.org/tutorials/getting-started). ### The Printable Puzzle Project The [Printable Puzzle Project](https://www.puzzlehub.org/ppp) 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](https://www.thingiverse.com/thing:3198014) 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](https://www.puzzlehub.org/tutorials/puzzle-modeling). ### About the Designer Stewart Coffin has been called "the most outstanding designer and maker of interlocking puzzles that the world has ever seen". He is credited with over four hundred designs, has pioneered numerous ingenious puzzle forms, and has written extensively about puzzle design and craftsmanship. More information on Coffin, along with many other printable models of his designs, can be found on the [Stewart Coffin Puzzles](https://www.puzzlehub.org/puzzles/stewart-coffin) overview page. Happy puzzling!