This is a rare puzzle by Stewart Coffin, his design #39.  He invented this puzzle in 1983 and made it in wood, since then this puzzle become famous for two things.  First, for the difficulty of making it accurately in wood, and second for the difficulty of assembly.  Ironically, it seems the more accurately this puzzle is made, the harder it is to put together!You are purchasing a 3D-printed copy of the puzzle.  It is made from eSun PLA+ (red, purple, yellow).More info here: https://www.th...

Vortex is number 5 in Robert Rose's series of Mental Block Puzzles. This puzzle is exceedingly rare, and even more rare in this color scheme (most were black, blue, and silver). It is a challenging put-together puzzle that goes together very smoothly. One piece internally engraved "MBP 5 Vortex". Like-new condition with no damage to the anodization.Buyer to pay shipping; calculated after auction.This puzzle comes from the collection of the late Saul Bobroff, which we are selling on behalf of his...

Six Key Mine is number 9 in Robert Rose's Mental Block Puzzles series. This specimen is an original Rose, exceptionally rare to find. One of the six keys is labelled "MBP 9 6 Key Mine". This puzzle has never been solved, new in condition. Buyer to pay shipping, calculated after auction.This puzzle comes from the collection of the late Saul Bobroff, which we are selling on behalf of his widow, Paulette.

Exchange puzzle from IPP 17 in San Francisco, California.From the website:The Log Stacker is the kind of puzzle that makes you say, "I can do that," then no one hears from you for hours, if not days! It may look easy to get all 13 logs into the box, but we are sure that you will struggle with it for a long time! If you find a solution (one that does not involve a saw), try looking for another - there are two solutions! Measures 7-1/2" long x 2-1/2" wide. Ages 8 to adult.The puzzle is located in ...

The most difficult puzzle I have designed. The puzzle consists of 15 pieces. Some pieces can be slid under the edge. Goal: Make the numbers 1 to 9 from left to right in the frame There are different possibilities. But there is only one possibility to slide to a magic square. If you carefully open the puzzle (press the bottom of the title square piece) you will see a 4. Remember that.

Description:Fit all the pieces so that you can see through both hole and be able to close the lid.The puzzle will be shipped solved as it's better to protect the pieces. Simply open the lid without looking at the pieces falling (on a safe surface).Payment : PayPal (F&F preferred or fees to be paid by buyer). Wait until the auction is finished so that I let you know the paypal address to pay to.Please don’t pay directly after you win the auction. Let’s first discuss your preferred delivery re...

Description:The goal is to separate the pieces. Pretty trickyPayment : PayPal (F&F preferred or fees to be paid by buyer). Wait until the auction is finished so that I let you know the paypal address to pay to.Please don’t pay directly after you win the auction. Let’s first discuss your preferred delivery requirements and adjust the total amount accordingly.Note: I have disabled the anti-snipping feature. Meaning that the auction will not extend. So if you're interested in buying, don't wait...

Description:Designed by Carl Hoff and made by Puzzle Ring Maker in 925 silver.WOW5 won a Jury Honorable Mention in the 2016 Nob Yoshigahara Puzzle Design Competition at IPP36 in Kyoto, Japan.It's very very tricky to reassemble and so far I have not managed to do so. So it will be shipped unassembled.The rings may need a bit of cleaning as well.The box is provided of course.I don't know the size of the ring.Payment : PayPal (F&F preferred or fees to be paid by buyer). Wait until the auction is fi...

Description:This little puzzle is composed of 4 3D printed pieces and 1 ball bearing. The goal is to assemble the pieces with the ball inside.Note that the puzzle will be shipped in a solved state, but you just need to take it out of the plexi box and all parts will fall; so you won't be spoiled.Payment : PayPal (F&F preferred or fees to be paid by buyer). Wait until the auction is finished so that I let you know the paypal address to pay to.Please don’t pay directly after you win the auction....

Description:Sixteen standard burr pieces interlock serially with only one solution to form a cube. You might think that beveling the edges would give the solver hints, and you're right. Building Block Burr is difficult enough that the bevels were intentional to give you guys a chance! Otherwise the unexpected and tricky six move routine which surprises you in the middle would be nearly impossible.Construction of this puzzle was tricky...we left the ends unbeveled so the cube would have a solid a...

Description:The famous revomaze: "just" open the core.The puzzle will be shipped disassembled unless required (but I have never reassemble a revomaze, so ask at your own risk!) with the pins of course and the certificate.The maze is in a very good shape.It seems that Bronze V1 is discontinued and won't be produced again.Note that there are some small dents on several sides. It does not affect the solving process.Payment : PayPal (F&F preferred or fees to be paid by buyer). Wait until the auction...

Description:Separate the pieces.In its original boxPayment : PayPal (F&F preferred or fees to be paid by buyer). Wait until the auction is finished so that I let you know the paypal address to pay to.Please don’t pay directly after you win the auction. Let’s first discuss your preferred delivery requirements and adjust the total amount accordingly.Note: I have disabled the anti-snipping feature. Meaning that the auction will not extend. So if you're interested in buying, don't wait until the...

2D and "Tangram like" packersFor sale is a lot of three puzzles:1. N.E.A.T. No. 1 by Johann Martinez - new, original packaging incl. sealed solution2. Eight L Plus by Diniar Namdarian - new, sealed3. 5L Puzzle by Jean-Claude Constantin - usedComes from a smoke free home and has always been properly stored.Payment via Wise (preferred) or PayPal "Friends & Family"Buyer to pay shipping - calculated after auction  Multiple items may be combined for shipping upon request

There is a frame, 12 star-holed pentomino pieces, and 3 double-sided multi-challenge playing cards. There are 18 challenges to complete.This was the IPP41 Exchange puzzle from Louis Toorenburg.  It's still in its original shrinkwrap.The puzzle is located in the United States, but I will ship worldwide.Customs forms for international shipments will reflect actual payments.Payments can be made through PayPal (Friends & Family preferred).Buyer to pay shipping calculated after auction.Please wait...

Description:Nice puzzle made by PelikanPayment : PayPal (F&F preferred or fees to be paid by buyer). Wait until the auction is finished so that I let you know the paypal address to pay to.Please don’t pay directly after you win the auction. Let’s first discuss your preferred delivery requirements and adjust the total amount accordingly.Note: I have disabled the anti-sniping feature. Meaning that the auction will not extend. So if you're interested in buying, don't wait until the auction is a...

Description:ORB puzzle by SonicGames in its extreme version. A very challenging with a clever mechanism! Feels well in your hands and displays well. Come with its original leather box.Payment : PayPal (F&F preferred or fees to be paid by buyer). Wait until the auction is finished so that I let you know the paypal address to pay to.Please don’t pay directly after you win the auction. Let’s first discuss your preferred delivery requirements and adjust the total amount accordingly.Note: I have ...

Description:Designed by Leonid Mochalov and made by Pelikan few years ago.Payment : PayPal (F&F preferred or fees to be paid by buyer). Wait until the auction is finished so that I let you know the paypal address to pay to.Please don’t pay directly after you win the auction. Let’s first discuss your preferred delivery requirements and adjust the total amount accordingly.Note: I have disabled the anti-sniping feature. Meaning that the auction will not extend. So if you're interested in buying...

Try to open the puzzle by removing the 4 cylinders with the numbers. (2014 is year of design) If you have problems to open it, use the green tool.But try to find out why this tool is  in the BOX!!!GOOD LUCK!

Reason for sale: total sale of stock of the closed online shop. Condition of the puzzle: unused, like new. Producer: Logica Giochi Dimensions: 115 x 115 x 25 mm Shipping worldwide from Slovakia, costs (including tracking): Outside EU: 15 € EU: 11 € Slovakia: 4 € Payment via PayPal or Direct bank transfer. Buyer pays shipping costs, so please wait for the final invoice before payment. Feel free to message me if you have any questions.

Reason for sale: total sale of stock of the closed online shop. Condition of the puzzle: unused, like new. Producer: Logica Giochi The puzzle is supposed to have been invented by Archimedes 2200 years ago. The Ostomachion, also called Syntemachion or Loculus Archimedis, consists of 14 flat pieces of various shapes forming a square. The area of each piece is commensurate with the area of the square in the ratio 1:48. How many possible distinct square arrangements can be made using all piece...