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Cast Equa
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Cast Equa

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ObjectTake apart and reassemble the puzzle
DifficultyLevel 9 - Gruelling
TypesHanayama Metal Puzzles, Oskar van Deventer
Dimensions1 7/8 in x 1 7/8 in x 1 7/8 in / 4.6 cm x 4.6 cm x 4.6 cm
PackagingCardboard Box

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Product Info

Challenge your mind and test your problem solving skills with the Cast Equa Metal Puzzle from Hanayama Huzzle. This intricate 3D mechanical puzzle is crafted from high quality metal and features a complex design that will keep you engaged for hours. The Cast Equa takes on a spherical shape of an astronomical model of a planet and its surrounding ring.

The planet positioned tightly inside the ring looks as if it cannot be taken out, and all you can do with it is rotate it on its axis. The objective is to remove the planet from inside the ring, separating the puzzle into three pieces, and then reassembling it to its original state. With its sleek and modern appearance, this puzzle designed by Dutch designer Oskar van Deventer makes for a unique gift for him or her, perfect for metal puzzle enthusiasts and those who appreciate a good brain teaser.

Product Details

  • Material: Metal.
  • Category: Metal Puzzles.
  • Difficulty Level: Gruelling, 9/10.

Ideal for

  • Metal puzzle lovers.
  • Adults looking for a challenging and fun activity.
  • Unique gift for him or her.
  • A gift for birthdays and Christmas.
  • Hard to buy for individuals.
  • Those who enjoy mechanical puzzles and brain teasers.
  • Custom puzzle enthusiasts.
  • Anyone looking for a unique and engaging gift for friends and family.
Note: Our level rating system is different than Hanayama's.  Hanayama's level 1 is equivalent to our level 5, their level 6 is equivalent to our level 10.

Customer Reviews

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4.4 rating

28 Reviews

Disclaimer: These reviews are written by our customers. Puzzle Master makes every attempt to keep these posts informative and relevant. If you find a post objectionable or inappropriate, please let us know by sending an email to [email protected]

    On Friday December 1st Tsc wrote,
Pain, this is in my opinion 1 of the hardest hanayama puzzle, worth getting it!
    On Thursday May 12th Paschalis Antoniou wrote,
Great design by Mr. Van Deventer and quality is superb, as expected by Hanayama! I had a great time trying to solve it!
    On Wednesday November 11th Cyril wrote,
Nice puzzle, the black finish started chipping almost immediately (which actually kind of helps), and a challenge to get through. I've done this puzzle twice now and I don't know how I feel about it, because it was not much easier to get through the second time despite knowing the moves. Got stuck on my third attempt through and decided it's better as an ornament now. If you enjoy puzzles that require absolute precision every time this one is good, personally I'm going back to fiddling with Cylinder.
    On Tuesday June 13th Bippy the Beardless wrote,
The one I cannot yet solve. So it must count as a 10 more than a 9. I have almost all the Hanayama 9s and 10s.
    On Friday March 10th Glynn wrote,
It seems the manufacturer has tightened up the tolerances on this one. I own two of these bought some years ago. A friend showed me his and I volunteered to solve it, as he did not know I had my solution well practiced. My solution did not work on his, and the reason was obvious once I took out a micrometer from the tool bin at work. The given solution from the manufacturer is the ONLY one that would work on my friends example, mine was useless. So this puzzle is even more difficult than ever. One of my favorites.
    On Monday May 23rd Hannes Voites wrote,
Level 6 not 5, impossibly hard, tight tolerances, gets stuck, not fun most of the time. If you like torture (I do sometimes), this is up your alley. The coating on this is stronger than on some others (square, donuts) oddly enough, which comes in handy I guess.
    On Saturday July 26th Mounir Skafi wrote,
This is an awesome puzzle as well as it is evil the puzzle is solved just bu observing it there is a weak place where the rings are removed I solved it after two months of working on it but I removed the pieces in a way then I brought the solution this showed a very different way of solving as said below thus it has 2solutions I suggest it for all people who like challenges but they must be perfect in easier levels before trying this one because it is extremely hard and evil
    On Thursday February 28th Tristan wrote,
An absolutely fantastic puzzle. The bad news is that it is devilishly hard. however its design is beautiful, simplistic, it feels good in the hands, and should you solve it, you end up a champ. Still haven't solved it yet, even though I know how it's done. Definitely a fantastic addition to any collection
    On Tuesday December 25th Jens wrote,
This one is the only Hanayama in my collection that i would describe as "evil". It's extremely difficult and requires you to pay very close attention. I can't say more without giving a hint to the solution. I've solved it on my own, but upon checking the solution that can be found on the internet i found out that they way how i did it is very different. So yes, there are TWO solutions!
    On Wednesday November 7th Shaggy wrote,
Idea - 6 Design - 6 Difficulty - 6 Enjoyable/fun - 3 Because of the last, I am rating it lower than 5 stars. I have it for several days, yesterday I managed to disassemble it, but I was not cautious on the last two "steps" of the disassembling and now I cannot put it back together! I did something using force and reached a dead end, where the pieces can neither move back (maybe the force was easier in one way, and can hardly be applied in the reverse), nor move up to the full assemble. With time, if I happen to exit the dead end and find the correct path, I might like the puzzle more.
    On Friday April 6th enzoyote wrote,
The best puzzle I ever bought ... Still working on it, I have a lot of fun when I find new movements in it - even if they still don't form a sequence ! This equa puzzle is also original for its shape . OK ... I go back to it now !!!
    On Saturday February 18th Will wrote,
Well... what can I say? This puzzle is well-made and good-looking, and it sits well on my table, which I like. But it's definitely too difficult to be a level five. It should be a level 6, or even higher. This one is extremely scary for even a master. First, it needs to be very precise, one step wrong and you're stuck. I'm not going to give away the solution, anyway the website won't let me. But just let me say that in order to solve this puzzle, there seems to be a lot of places and directions to move the two rings in order to solve this puzzle, but there is actually only one, and you can barely discover the difference. Anyone who had solved this will realize how scary it is. Second, it gives no clue about how to solve it. Although what you see is what you get, you still won't be able to know what to do until like decades later. Some movements required even seem to be impossible to do at first. And you will not be able to know if using some force will lead you to the right way, or the wrong direction. Even with solutions you won't be able to smoothly solve this. Scary for even master puzzlers. WARNING: I DON'T RECOMMEND THIS FOR PEOPLE WHO HADN'T AT LEAST SOLVED ONE LEVEL SIX HANAYAMA PUZZLE!
    On Tuesday June 7th Alex wrote,
Not as unfair as some reviews suggest. Tough, yes, but isn't this why we purchase these? Took me well over two weeks, and I finally cracked it. You'll enjoy it, notwithstanding, it takes a lot of thinking to see why the obvious possibility will not work.
    On Friday January 21st john acord wrote,
This puzzle is a very interesting little metal sculpture, with a lot of personality. Five stars.
    On Wednesday January 19th dude wrote,
solved it in ten min awesome puzzle i guess i got lucky :)
    On Friday January 7th Thomas wrote,
One of my favorite puzzles. Very hard to figure out. I've solved it three times but can't remember how I did it. Highly recommended.
    On Sunday December 26th Jerome wrote,
This is a pretty puzzle to look at but there are no clues on how to begin. There is only one starting position and there is no way to figure that out by looking or for that matter by even reading the solution. Even with the solution in hand, the puzzle is extremely difficult. I would like to hear from any one who solved it without the instructions, especially how they found the starting point
    On Monday June 21st Marijan wrote,
I got this one for my birthday about a month ago. Back then, my friends and I tried it, and failed. Then I went to a conferece on phsysics (actually two of them) and again nobody succeeded. In total 40 people had it in their hands :) So, you can see that it is quite difficult. Besides, it is well made, looks appealing and feels good in hand. Perfect for long holidays.
    On Thursday December 24th denis_k wrote,
This puzzle is very tricky. Spent many days with it. I was able to find one and only one position that solves it. Fantastic effort was put into it to make it as precise as it is.
    On Tuesday November 17th Muwoka wrote,
Best puzzle i've ever done at now. The design is cute and metal is smooth.
    On Tuesday October 20th Braydn wrote,
It is very frustrating, i got it a t a show thing today, my friend played around with it so now it is impossible to figure out, even by using the solution on this page i just downloaded. I'm trying to get it back to the start to try it again, and once i do, nobody is using it. But Me.
    On Thursday August 27th Mark wrote,
I have been picking this up from time to time for the last 6 months or so. Still haven't solved it. Reminds me of Oskar's Egg, but with some bumps that restrict movement and have foiled me so far. Substantial, heavy puzzle with a very pretty finish that shows well.
    On Thursday July 23rd Rob wrote,
This puzzle would be better if it were larger. I cheated on this one, and I couldn't solve it with two youtube videos, and the written instructions in front of me. It took me several hours to figure it out even after obtaining these things. The thing I hate about this puzzle is that you try the same thing 100 times and it doesn't work. The 101st time it will work because you are a hair off. The solution tells you to look for something. However, what you have to look for is impossible to find. I solved without finding what you're supposed to look for.
    On Saturday May 2nd ken wrote,
created by oskar ???? oscar must be a genius for creating this, with a verrry cruel, demented mind for inflicting this on unsuspecting puzzlers!!!! but i refuse to give in and download the solution i shall outwit him and solve this most excellent challenge
    On Thursday February 12th Brian wrote,
This should definitely be a level 6 Hanayama. It took me about two weeks of working on it sporadically. Maybe 4-5 hours total. Pretty fun but frustrating at times. The 'trick' could have been a bit more obvious and still made for a fun and interesting puzzle.
    On Sunday January 4th Richard Benjamin wrote,
My goodness this is a tricky one. Agree with the excellent cast quality. I've managed to slide the two middle pieces apart, but still haven't managed to separate them or get them out of the frame. (Continuously trying since Christmas Day)!
    On Tuesday December 16th Billy Watts wrote,
A gorgeous metal puzzle, very well cast, I have not solved it yet, but it spins around inside very nicely and the pieces are very hard and well made. Though I have seen some of the silver metal flaking off to expose a copper color underneath
    On Sunday November 23rd Pentti wrote,
Very hard to be 5 Hanayama star puzzle. I like this. Fine puzzle.
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