Penny Farthing III was Lambert Wrights exchange puzzle at IPP25 in Finland, 2005.The goal of this very good looking disentanglement puzzle is to untangle the rope from the wheel so that Spokes (the rider) can ride again. See 4th picture fpr the original detailed description.This puzzle comes in its original exchange packaging box.= = = = = over 70 IPP25 exchange puzzles available, see my other listings = = = = =

Sleazier was Pavel Curtis' exchange puzzle at IPP25 in Finland, 2005.The goal of this 2D packing puzzle is to place all 4 pieces flat in the tray.The pieces are nicely made from transparent acrylic, the tray is partially transparent with a black background. The original solution sheet is included.= = = = = over 70 IPP25 exchange puzzles available, see my other listings = = = = =

7 L-ements was Greg Dye's exchange puzzle at IPP25 in Finland, 2005.The goal of this 3D assembly puzzle is to make a solid cube from the 7 different L-shaped piecesEach L-shape is cut from a single piece of wood and very smoothly finished.The puzzle comes in its original cardboard box with instruction label.= = = = = over 70 IPP25 exchange puzzles available, see my other listings = = = = =

IPP25 Suomi cube was the exchange puzzle of Kevin Holmes at IPP25 in Finland, 2005.The goal of this (small and difficult) 3D packing puzzle is to assemble the ten pieces into a 4x4x4 cube.The 10 pieces spell the letters/numbers  "IPP25 SUOMI".The puzzle comes in original plastic packaging box, with instruction sticker on the outside.It will be shipped UNsolved.= = = = = over 70 IPP25 exchange puzzles available, see my other listings = = = = =

Trivial was the exchange puzzle of Walter Hoppe at IPP25 in Finland, 2005.The goal of this beautiful laser-cut 2D packing puzzle is to pack the 3 identical heptomino's in the 6x6 square tray.The instruction and exchange informatio nis laser engraved on the edge of the tray.No additional paperwork is involved.= = = = = over 70 IPP25 exchange puzzles available, see my other listings = = = = =

DEN-Cube was the exchange puzzle of Takeyuki Endo at IPP25 in Finland, 2005.The goal of this 3D (dis-)assembly puzzle is to take the puzzle apart in to 4 pieces, and then put it back together in an alternative assembly, so that the IPP25 logo is flipped (not upside down anymore).The puzzle has 2 possible assemblies, so given the objective the solution is unique.The name is DEN-Cube, but it looks more like a burr shape.The puzzle comes in original zip lock bag with original instruction sheet.= = ...

Perfect Packing was the exchange puzzle of George Miller at IPP25 in Finland, 2005.The goal of this puzzle is to pack all 28 equal blocks (measuring 3x4x5 each) into a 12x12x12 cube.There are 3 different solutions, the most difficult one is distinctly non-symmetrical.The puzzle comes in original transparent packaging cube, which has a hinge on one edge toopen up.No instruction or solution is included with the puzzle.= = = = = over 70 IPP25 exchange puzzles available, see my other listings = = =...

4 x 4 Play Puzzle was the exchange puzzle of Karst Nauta at IPP25 in Finland, 2005.The goal of this puzzle is to make 3x3x3 cubes, with 4 different sets of pieces.Each time taking all 3 pentacubes and 3 of the 4 provided tetracubes.Each of the 4 combinations has a unique solution.The puzzle comes in its original wooden box with sliding lid, and includes the original instruction sheet.The yellow singe block is a bonus piece to make it more interesting to pack the pieces back in the box.= = = = = ...

Pentomno was the exchange puzzle of Peter Nischke at IPP25 in Finland, 2005.The goal of this puzzle is to pack and unpack the eleven (flat) pentacubes into the 4x4x4 cube casing.The cube casing is made of two halve (3 sides each) that have nine fixed cubes inside.The pieces are a bit tight, they require accurate alignment because of the sharp (i.e. not bevelled) edges.The puzzle comes in its original cardboard box, no instruction or solution sheet is provided.= = = = = over 70 IPP25 exchange pu...

Zebra puzzle was the exchange puzzle of Tsugumitsu Noji at IPP25 in Finland, 2005.The goal of this puzzle is to pack the pieces into the wooden frame with horizontal or vertical stripes.The pieces can be packed in matching stripes both vertically and horizontally regardless of the position of the square piece.Additional challenges are provided, to make various 3Dblock shapes and various zebra-shapes. See pictures 3 & 4.The puzzle comes in its original cardboard box, with instruction sheet.= = = ...

Gala Cube was the exchange puzzle of Irina Novichkova at IPP25 in Finland, 2005.The goal of this puzzle is to pack the 8 elements in the box, forming a solid cube.2 of the 8 elements are cubes, the other 6 are combinations of 2 half-cubes.An additional challenge is to pack the 8 elements in a form of a cross with a height of one cube, see 3rd picture.The puzzle comes in its original wooden box, with with instruction sheet.= = = = = over 70 IPP25 exchange puzzles available, see my other listings...

Imp Possible Nail was the exchange puzzle of Frank Potts at IPP25 in Finland, 2005.The nail can move back and forth but cannot leave the wooden ring, apparently...Discover the secret to find out how this imp possible object was created.This puzzle looks good, and it is best to try to discover the secret without touching the puzzle.When the puzzle is handled, or when a slight force is applied, the trick can easily be discovered.This puzzle comes in its original zip lock bag with information label...

Ball Room was the exchange puzzle of Jerry Slocum at IPP25 in Finland, 2005.This is Stewart Coffins design #197-A.This puzzle has 3 problems/challenges:Problem #1. Fit the four pieces into the cover to form a square pyramid. One solution.Problem #2. Use three of the pieces to form a tetrahedral pile inside the box. One solution.Problem #3. Fit all four pieces inside the box. Three solutions.The puzzle is packed in its box with cover, which are part of the puzzle itself.The instruction label is o...

Blocked box was the exchange puzzle of Henry Strout at IPP25 in Finland, 2005.This is Stewart Coffins design #199.The goal of this packing puzzle is to fit the pieces in the 3x3x3 box and take them out again.One voxel is permanently attached to the inside of the box (see picture 3), making this a "3D restricted entry packing puzzle"The puzzle comes unsolved, in a zip lock bag, without instruction or solution papers.= = = = = over 70 IPP25 exchange puzzles available, see my other listings = = = =...

Double Half-cube was the exchange puzzle of Naoaki Takashima at IPP25 in Finland, 2005.The goal of this puzzle is to fit the  pieces in the box, and to make 15 additional shapes using all 8 pieces.All 8 pieces are combining “a half cube prism” and “a half cube tile”.See picture 3 for the puzzle story/background.The puzzle comes in its original transparent plastic packaging box, with original instruction sheet (picture 3 4) and solution sheet.= = = = = over 70 IPP25 exchange puzzles ava...

Cub de L'Albert was the exchange puzzle of Albert Violant i Holz at IPP25 in Finland, 2005.The goal of this puzzle is to Put the 16 wooden pieces of the puzzle together in order to form a 4x4x4 cube, so that all the metal bars remain in the interior of the structure, passing through the holes.The puzzle comes in its original plastic box, with original instruction- and solution-sheet.= = = = = over 70 IPP25 exchange puzzles available, see my other listings = = = = =

Plated Six Piece Burr was the exchange puzzle of Frans de Vreugd at IPP25 in Finland, 2005.The goal of this puzzle is to assemble the 8 pieces into a burr shape.The instruction label  (picture 3) describes what is special about this plated burr.The puzzle comes in its original shrinkwrap with instruction label, it has never been unwrapped.= = = = = over 70 IPP25 exchange puzzles available, see my other listings = = = = =

Osho’s Packing Puzzle was the exchange puzzle of Rikishi Yamada at IPP25 in Finland, 2005.The tray packing puzzle has 3 (or actually 7) challenges:1) Pack the 8 pieces in the tray so that it is “anti-slide”, i.e. none of the pieces can slide.2) Pack the 8 pieces in the tray so that it is “not-color match”, i.e. no two pieces of the same color touch each other.3) Pack the 8 pieces in the tray so that the 5 exposed squares are the same color: pink, green, grey, yellow or blue.The pieces...

Minos T was the exchange puzzle of Bernhard Sweitzer at IPP35 in Canada, 2015.The goal of this puzzle is to make each of the 8 given shapes using all 12 pieces.The pieces are made from 3 different (but not specified) woods.The puzzle comes in its original rigid  plastic box, shown in the pictures.

Vicious Cicrle was the exchange puzzle of Tatiana Matveeva at IPP22 in Belgium, 2002.The goal of this puzzle is to open the box. it is a vicious circle because:To open the box, you need to know its secret ... To see its secret, you need to open the box.This is a hard puzzle with an invisible locking mechanism.It does provides enough tactile feedback to understand what may be going on inside. The top lid was loose, it is glued back in place. After the repair the box was opened and closed withou...