Goh Pit Khiam sent me this design and I really liked it. It's a tricky packing puzzle that uses a new type of motion. With five identical pieces (but different wood types) and an acrylic cover, it's a lot of fun to play with and figure out. Moderately difficult, you can feel comfortable handing this off to a non-puzzling friend. Fit is very good, should not have any issues with humidity changes.Note:  This copy has an acrylic floating bottom panel for display in the solved state, which is diff...

Up for Auction is Eternity by Christopher Monckton. These webpages contain an explanation of the puzzle as well as a brief history of the solvers. Thank you to Ed Pegg Jr. from mathpuzzle.com for the information about this design. Most of the original information is no longer accessible. https://mathpuzzle.com/eternity.htmlhttps://en.wikipedia.org/wiki/Eternity_puzzleMost notable is the one million pounds sterling cash prize given to the first successful solver. Each piece of this puzzle is mad...