This is an imposable puzzle by Rocky Chiaro, machined from a solid piece of brass.

Separate the curled metal parts from each other! Design: Doug Engel.

This 6-piece burr is level 8.3.2.2. It has 105 theoretical assemblies, but only one can actually be constructed. This puzzle can be sent assembled or disassembled, your preference.

Reassemble the nine pieces into the triangular tray, including the small 10th piece. Other challenges as described in the instructions.

The Hamiltonian cycle on a dodecahedron, 3D printed out of stainless steel. Suitable for hanging as a pendant, includes a silk cord. This model is quite small, 16 mm tall.

Can you assemble the 12 blocks into a single, solid rectangle? This is a difficult packing puzzle. Nicely made by Pavel Curtis out of 6 mm thick black acrylic.

These are two of Wil Strijbos bolt puzzles.They were purchased in the early '90s from Ishi Press.One of them was called the Bomb, the other is called the Low Number Bolt.

Brand new sliding piece puzzle by the master. Very solid, highly playable puzzle new in box. Shipping NL: 0-10 kg € 6,95 International up to 2 kg.: EUR 1 € 13,00: Most EU countries in Western Europe EUR 2 € 18,50: Most EU countries in Eastern Europe, also the Baltics, Finland, Hungaria, Ireland, Poland, Portugal EUR 3 € 19,30: Europe: a variety of other, mostly smaller European countries and non-EU members World € 24,30: Russia and everywher...

Object: Remove the "diamond" from the Queen.(May need a bit of polishing to restore its shine)

This is the original version with the white frame and the black and white balls. According to Jaap’s ‘it’s a rather difficult puzzle due to it not having many straight edges’ (see: http://www.jaapsch.net/puzzles/solo.htm) Comes with the original sleeve with texts in Dutch. Sleeve is a bit worn, but very legible and fine for its age. Shipping NL: 0-10 kg € 6,95 International up to 2 kg.: EUR 1 € 13,00: Most EU countries in Western Europe E...

The Trick Bolt #1 is made from brass which gives it this aged look. It feels heavy and sturdy, but no extra force or tools are necessary to solve it. The goal is to simply remove the nut from the bolt and be able to remove the ring as well, but the solution is not that simple. Appearances can be deceiving and you’ll understand this once you finally see its mechanism.The Trick Bolt #2 is also made from solid brass and looks just like the real thing. Can you remove the ring by finding out how to...

The Lunatic Lock is made from brushed aluminum which makes the puzzle lighter than other types of metal. Like any other Trick Lock, the goal is to open it by figuring out the hidden mechanism.

From Cubic Dissection:Ronald Kint-Bruynseels is a very progressive designer who has a knack for thinking in new directions. The beauty of his designs is that he achieves incredibly high level puzzles with relatively simple shapes...This beautiful and unconventional puzzle has a unique level 17-14 solution. An incredibly difficult puzzle that can easily be displayed as a work of art once solved.

From Eric Fuller / Cubic Dissection:The unique shape of the Rough Night Burr is what initially caught my eye. Combine that with a very elegant set of pieces (two sets of three identical), a unique level 4.5.2.3.3 solution, and some very very tricky moves and you come up with a winner. While this design isn't as new as many from this update, it was beggining to be made and I'm glad I did. The assembly has a lot of movement but no shortcuts or illegal moves. The final assembly is quite stable and ...

This is a stunning puzzle made entirely from aluminum. Comprised of four pieces in two different types, the goal is to take them apart and reassemble them again. It might be easier to separate the pieces, but putting them together again will require some skill and dexterity. Do you have steady hands for this task? An original design by Doug Engel.

An unusual three-piece puzzle made of coated aluminum. The goal is to free the ball in the center by taking apart the three pieces. As a level 8 it can be rather challenging, but putting it back together will require even more skill and dexterity. Designed by metal puzzle craftsman Doug Engel.

The object of this puzzle is to dissemble the brass Pyramid.Designed by metal puzzle craftsman Doug Engel.This puzzle is UNSOLVED.

This 6-piece burr consists of three identical pieces plus three mirror image pieces. It is level 4.2.2.2.2. It is more difficult than the level would indicate, due to the unusual final shape, as well as the fact that many pieces are moving together in the final (or first) 4 moves.There are several versions of Karin's Outline Burr, this is not the most difficult one (made by Eric Fuller). I am not sure if this was the version exchanged at IPP21.

A tray puzzle with two goals: (1) pack the 5 colorful houses into the rectangular tray, and (2) pack all 5 pieces into the house-shaped tray. Designed by me and custom made by Orange Kat LLC, a laser cutting service. The trays are enclosed in a unique book binding, which has a dove-tail closure and closes using a living hinge. When closed, the book binding provides a storage container for the pieces. You can even place the "book" in a bookshelf.This was my exchange puzzle for the...

Trick opening box by Akio Kamei in walnut and in original Karakuri packaging.