Box of the Celts is a very strong contender for being the hardest sequential discovery puzzle out there! But it's very fair with it's difficulty, so I can't truly say it's the most difficult puzzle in the world. I'm looking at you SMS Box and I still say you are very unfair with your solve! It involves aspects from puzzle boxes, puzzle locks, disentanglements, coordinated motion, mazes and hidden mechanisms to torment you!BotC by Numbskull Puzzles or Matt M, is diabolical. It's surprisingly stra...

One Wa-Sure by the late Rocky Chiaro. This is regarded as the best of his trick bolts. Including original ziplock bag and “sealed” solution sheet(a small piece of tape I never removed). I am the original owner. The puzzle has some scuffing on the brass but is in excellent condition.Pay by PayPal FF or Venmo preferred. I will ship using a label from pirate ship, I’ll provide total price after shipping label is created. Labels from pirate ship are usually less than $10 USD.

One of four metal templar locks created by BeardsWoodShop. Of the four boxes made, each had a unique knight engraved into the box. That makes this puzzle a 1 of 1. I am the original owner. The puzzle is in perfect condition.Pay by PayPal FF or Venmo preferred. I will ship using a label from pirate ship, I’ll provide total price after shipping label is created. Labels from pirate ship are usually less than $10 USD.

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: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...

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:The goal is to take apart the ball. This is an original puzzle designed and made by Marcel Gillen himself long time ago. The original thing about this puzzle is that it's composed of 3 different material: MDS, aluminium and plastic.4 steps to solve the puzzle (but it always depend on how you count the steps)The puzzle will be shipped with the base wrapped separately from the metal tube and separately from the cage with the ball inside.Payment : PayPal (F&F preferred or fees to be pai...

Description:Designed and made by Christian Cormier.Goal is to extract the keys.Heavy and very challenging puzzle. Limited edition.The original tool will be provided to help you reset the puzzle faster (but it's not needed to reset the puzzle!). 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 requ...

Description:Designed and made by Steve Miller. The goal is to open the puzzle and discover its secrets. Many things to discover. It's a challenging puzzle!It comes with its original box.Note that (you will see in the picture) that the plastic feet moved a bit away from their original position leaving some sticky marks. It's not an issue at all and you can either get rid of these plastic feet or put new ones (to avoid scratching the base of the puzzle)Payment : PayPal (F&F preferred or fees to be...

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...

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:Open the corian safe.And then you will have another challenge (a difficult one!) that will require a lot of creativity.The black button should not be taken out. If you take it out, it will spoil you the solution and will reveal the mechanism.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 ...

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:The goal is to free the coin and unlock the shackle. 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.Feel free to ask questions you might have.

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...