“Gear Up”   This puzzle is an exchange puzzle by Dave Rossetti for the International Puzzle Party 25 held in Helsinki, Finland 2005   Objective / Description: Rotate the discs until the notches in the four tabs are exactly aligned.   About the puzzle: The puzzle is a stack of four plastic discs attached via a center axle, each has a tab and notch and can rotate on the axle. The plastic is transparent so that various internal planetary gears can be viewed ...

“Change of Heart” This puzzle is an exchange puzzle by Hans van der Zon for the International Puzzle Party 25 held in Helsinki, Finland 2005 Objective / Description:Change of Heart is a sliding-piece puzzle with 8 pieces.The plain heart can be changed into the patterned heart and back again. When the middle piece of the puzzle is removed, the other 7 pieces can slide. They can be rotated in one corner of the puzzle.  Packaging: Cardboard coverPrelimina...

“The Flag”   This puzzle is a exchange puzzle by Tom Rodgers Jr. for the International Puzzle Party 25 held in Helsinki, Finland 2005   Objective / Description: The object of this sliding block puzzle is to rearrange the Finnish flag to its proper design, and at the same time for the puzzle party line to read IPP 25 (not 25      IPP).   About the puzzle: The shortest sequence has 39 steps, if the goal is fixed as in the goal picture. If, however, the ...

This is a sliding puzzle with 9 pieces that can be moved by row shifting. The rows can be shifted per 3 pieces horizontally or vertically.   The puzzle was designed and made in 2017. (there are less than 50 copies).   Objective: 1. Move the numbers in a different order. See attached drawings. (simple) 2. Use 1 yellow block on 2 sliding rows, which forces you to move 2 sliding rows at the same time. (difficult) 3. Now use 2 yellow cubes. One horizontal and one ...

Pentangle, of England, produced popular puzzles for many years.  It was founded by the great James Dalgety.  "Pit-Stop" is one of their sliding piece puzzles from around the 90's.  Its clever and unique (for a sliding piece puzzle) goal is to exchange the positions of several specific pieces, under the guise of swapping-out four wet tires for four dry tires.  My copy of "Pit-Stop" has never been opened!  (The original sealing tape still holds the plastic package closed.)  This is why I had...

Japanese Sliding Puzzle - Wooden - NEW

Electronic Rush Hour - working

Nice sliding puzzle designed by Goh Pit Khiam.IPP 29 Exchange puzzle from Larry SeidmanObject: remove all the pieces by sliding them around while moving the shuttle back and forthAfter the end of the auction the final shipping cost will be calculated.Besides PayPal, Wise payment solution is also an option.SEPA bank transfer is also accepted (EU countries) and free.

Harry Nelson is a famous recreational mathematician.  He spent most of his career at Lawrence Livermore National Laboratories working on early supercomputers.  He was the editor of the Journal of Recreational Mathematics for five years.  "Slide-Trom-Bones" is Harry's mathematically intricate sliding piece exchange puzzle from the 20th International Puzzle Party held in Los Angeles in 2000.  The puzzle is beautifully crafted in three woods by the great Wayne Daniel (Interlocking Puzzles).  T...

Next Floor, designed by Oskar van DeventerProduced by Bits and PiecesNext Floor is a multi-level, ball traversing maze.  From Oskar's website: "This is a multi-layer ball maze. Try to get the steel ball out of the maze. The ball interacts with both floors and ceiling, so it is quite a challenge to see the path. This makes it a fun puzzle."  Next Floor was an IPP29 exchange puzzle (2009).A gorgeous looking, rainbow colored 3D-printed version was recently described on youtube (https://www.youtub...

"Bella" sequential discovery to free Bella designed and produced by Rex Rossano PerezWe are clearing out some items from the office so a great time to take advantage! Please wait for final shipping costs at the end of auction before paying. No PP Fees! Paypal F&F preferred but not required.

Classic sliding puzzle. Match the interesting number design as outlined on the reverse

Excellent condition

Puzzle collector and perennial puzzle exchange participant Joe Becker asks the question, "Don't you think a 'mechanical puzzle' ought to have some gears?"  "Gearloose" contains 9 intermeshed gears, some with an occasional tooth missing.  The goal of "Gearloose" is to make the central red gear free spinning by turning the gears in a certain sequence.  A "move" consists of turning a gear 1/8 of a turn (45°) in either direction (causing all intermeshed gears to turn, as well).  Joe used "Gearl...

Black & Whitedesigned by Jurgen Reiche and crafted by Siebenstein-SpieleThis is a puzzle from the Exchange of the IPP39 in Kanazawa - Japan 2019. It is incredibly difficult. The goal is to exchange the "white" and "black" circles so that you bring the black circles in the right order from 1 to 5 in the row above and the white circles from 1 to 5 in the row below. I solved it once and I fully reset it but I don't remember how many moves it requires (anyway: many!). The mechanism by which the circ...

"Mindanao" sequential discovery find the star puzzle designed and produced by Rex Rossano PerezWe are clearing out some items from the office so a great time to take advantage! Please wait for final shipping costs at the end of auction before paying. No PP Fees! Paypal F&F preferred but not required.

The Flag by Tom Rodgers (IPP25 Finland 2005)Sliding puzzle with six wood pieces and wood tray.  Goal is to slide the blocks to form the Finnish flag.Combined shipping total for all items going to the same address (regardless of number of items):USA = $15 via USPS Priority Mail (typically 3-4 business days),International = $45 via UPS Worldwide Expedited (typically 5-7 business days).

"Visayas" sequential discovery find the star puzzle designed and produced by Rex Rossano PerezWe are clearing out some items from the office so a great time to take advantage! Please wait for final shipping costs at the end of auction before paying. No PP Fees! Paypal F&F preferred but not required.

"Rizal" sequential discovery coin release puzzle designed and produced by Rex Rossano PerezWe are clearing out some items from the office so a great time to take advantage! Please wait for final shipping costs at the end of auction before paying. No PP Fees! Paypal F&F preferred but not required.

"Barasoain" sequential discovery coin release puzzle designed and produced by Rex Rossano PerezWe are clearing out some items from the office so a great time to take advantage! Please wait for final shipping costs at the end of auction before paying. No PP Fees! Paypal F&F preferred but not required.