Lean-2 - Tray-packing puzzle by Stewart Coffin (STC #255)

prusaprinters

<h3>Lean-2</h3><h4>Tray-packing puzzle by Stewart Coffin (STC #255)</h4><p>Two puzzles in one: fit all four pieces into each of the two trapezoidal openings.</p><p><i>Lean-2</i> is one of a series of tray-packing puzzles by Stewart Coffin. It seems impossible at first, but it isn't... if it seems like the pieces just won't fit the way you expect, or the tray size is just a little bit off... don't worry! There's nothing wrong with the model or your printer. Keep trying. (The other puzzles in the series can be found on the <a href="https://www.puzzlehub.org/puzzles/stewart-coffin">Stewart Coffin Puzzles</a> collection page.) If you're unfamiliar with Coffin's tray-packing puzzles, I'd recommend starting with one of the others first; the linked collection page has some recommendations.</p><p><i>Lean-2</i> was originally presented for exchange at the International Puzzle Party 30 in Japan in 2010. Coffin revised it in 2014, slightly reducing the size of the opening on the right, and his revisions are incorporated into the model. Introducing his 2014 revisions, Coffin wrote:</p><p>"Bob Finn, who is very sharp at discovering unintended solutions, not only found one but his will fit into a slightly smaller tray. Thus an improved design with that redesigned tray. I do not list it as a separate design because I have never made one and it exists here only as my creation using Photoshop."</p><p>Well, now it exists outside of Photoshop. Enjoy!</p><h4>Printing Instructions</h4><p>Print one copy each of <code>coffin.lean-2.pieces.stl</code> and <code>coffin.lean-2.tray.stl</code>. Optionally, you may print <code>coffin.lean-2.lid.stl</code> as well, which is a lid that fits over the tray for easy storage.</p><h4>The Printable Puzzle Project</h4><p>The <a href="https://www.puzzlehub.org/ppp">Printable Puzzle Project</a> 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 <strong>non-commercial use only</strong>. 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.</p><p>Our puzzles are modeled using the open-source <a href="https://www.puzzlehub.org/puzzlecad">puzzlecad</a> library. The <code>.scad</code> 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 <a href="https://www.puzzlehub.org/tutorials/puzzle-modeling">Puzzle Modeling tutorial</a>.</p><h4>About the Designer</h4><p>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 <a href="https://www.puzzlehub.org/puzzles/stewart-coffin">Stewart Coffin Puzzles</a> overview page.</p><p>Happy puzzling!</p>