Tricky Numbers, IPP29 exchange puzzle for Wil Strijbos, designed by Ton Delsing. Object is to swap the number left-to-right. The 5-8 pieces are all one piece, and have a pin/notch in the back that only allow them to move up and down, and only 1 space. Very tricky! Three scratches on the back, should be visible in the picture.

Playground is a mechanical maze, where a flag moves from pole to pole and can be turned around at the arch. The puzzle was inspired by a doodle toy, in which a wooden acrobat tumbles down a ladder.

IPP32 exchange puzzle from Dick Hess. I ended up with two copies of this puzzle. A sliding block puzzle which fits right into the Washington DC theme. Ten problems are given in the sheet which comes with the puzzle. The puzzle comes nicely packaged in a cardboard box.

IPPDC bound, all wood version,,,, Classic ChinnomottoMillions have been invested intothe making this puzzle, also I need to get to IPP,,,, so, here tisDifferent mechanism from the Mouse HouseFind Mousie hiding inside, and let the adventure beginOnly 10 will be made , and 5 to be soldThis one is a non electronic version,,,,zzzzzzGuaranteed to keep you smiling!Have I ever fail to dissapoint?!!Free post worldwide and no Paypal feesHappy Bidding,,,and Have a Nice Day!On Jun. 09, 2012 18:00:56, t...

Basketball is a mechanical maze, based on a mechanical concept by Mark White. Through Ed Pegg's www.mathpuzzle.com page, Oskar found Mark White's CodeWorld game, see http://www.codefun.com/CodeW.htm. Mark had discovered that four pins placed in a tetrahedral fashion could smoothly slide through dodecahedrally placed grooves in a sphere. Mark used his mechanical concept for a sort-of a combinatorial game. Mark even developed some well-working prototypes. Unfortunately, after consulting several di...

A very nice Mintman sliding pieces puzzle.The original mints in the head I have removed (they were from the eighties!)It has been played with but no extensive marking.I'm selling these to make room for new additions.(Buyer to pay for shipping and Paypal fees)

Find the Mousie hiding insideIPP bound, get it before they doGuarantee to keep you smilingHave I ever fail to dissapoint??Free post worldwide and no Paypal fees

Same as #1, just a more square outline designFree post worldwide and no Paypal fees

A bandaged 3x3x3 Rubiks Cube. IPP31 exchange puzzle from Yee-Dian Lee.

from cubicdissection.com:La Cerradura Doble was Robrecht Louage’s 2008 IPP Design Competition entry. The puzzle was very interesting to me, so I contacted him and started chatting about it. One thing led to another and I agreed to help him sell his remaining copies left over from IPP. The original price was 100 Euros, so as you can see I have managed to negotiate an excellent price reduction for our valued cubicdissection customers.This puzzle is milled from solid stock, and there is no mistak...

Shipping cost is< 500g world 5.25 $< 1kg world 10.5 $ I will combine shipping cost if you have more then one puzzle.You have to pay the paypal fees.

Shipping cost is< 500g world 5.25 $< 1kg world 10.50 $I will combine shipping cost if you have more then one puzzle.You have to pay the paypal fees.

Shipping cost is< 500g world 5.25 $< 1kg world 10.50 $I will combine shipping cost if you have more then one puzzle.You have to pay the paypal fees.

this is a variant on the classic peg-solitaire game... Rules: A peg can jump, along the lines, over an adjacent peg to a vacant hole. Then the jumped peg is removed. Objective: Start with a single vacant hole at the center. End up with a single peg at the center. Find the shortest solutions. I'm selling these puzzles because I no longer have space to store or display them :(buyer i...

this is a brand new Mysterians puzzle by Oskar van Deventer.I had bought two by mistake. It was Nick Baxter's exchange puzzle at IPP23 in ChicagoThis is actually an abstract 3-dimensional maze... quite tricky!I'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

Rodolfo Kurchan's IPP19 London. Exchange Puzzle. Change the 1999 to show 2000 by sliding the pieces. Buyer pays shipping + $3 handling for the first item and $1 handling for each item after that. Thanks for bidding!

From IPP19 by Keith Winegar. Arrange the pieces into a heart on the base so that the holes on the pieces line up with the pegs in the base (removable). Navigate the bird from one rounded end of the heart to the other using the two long pegs. You can remove one, he will pivot on the other until you find another spot where the peg lines up, and soforth. If no solution is found, rearrange the tiles! Includes other challenges on the info sheet. - Also includes a cute book that illustrates the stor...

Switch the positions of the two black and two white knights, represented by pegs. Also includes Winning Numbers bonus puzzle. Includes solution. - Buyer pays shipping + $3 handling for the first item and $1 handling for each item after that. Thanks for bidding!

Start as shown in the photo, exchange the red pegs with the blue pegs. Pegs may move horizontally, vertically, or diagonally. No jumps allowed. Buyer pays shipping + $3 handling for the first item and $1 handling for each item after that. Thanks for bidding!