## Surround – Kohno Ichiro

I’m back in the puzzling groove and this week, I’ve got Surround designed by Kohno Ichiro and masterfully crafted by Eric Fuller over at Cubicdissection.

There have been a number of Ichiro puzzles released by CD recently, including Three Cubes, Four Cubes, and most recently Five Cubes and Surround. I’ve really enjoyed these puzzles. They are relatively easy, but also deceptively tricky. They are great puzzles for all skill levels and very satisfying to complete. The use of small, strong magnets really adds to the experience.

Ok, I’m excited to work on this one, so let’s get started. There are apparently 3 solutions to this puzzle – 2 that use the magnets and one that does not. The completed structure needs to be self-supporting.

There are 6 pieces and a cube. 3 of the pieces are mirrored which would lead be to believe that this is going to be a symmetrical solution, but I’ve been wrong many times before on things like this, so let’s see what happens.

Ok, well my first attempt was a total failure. I figured, I’d start with the cube and just add the pieces to the perimeter to surround it, but that did not work at all. The magnets didn’t cooperate that the resulting shape certainly did not surround the cube. Ok cool, I didn’t want this to be easy. Let’s give it another 15 minutes and see what’s up.

Ok, interesting. I believe that I have found one of the solutions – one that utilizes the magnets. It seems that my initial interpretation of “surrounding” the cube was incorrectly understood as “completely cover” the cube. And thus, I was searching for a solution that didn’t exist. Once I let go of that idea, and simply tried to surround the cube, I found a solution quite quickly. The cube is indeed surrounded and contained and the puzzle is self-supporting. Yay! Solution #1 is in the bank! And it is quite a cool looking construct that has formed. The Padauk and Tamerindo make for a beautiful contrast on the completed piece.

Warning: Spoiler Image Solution #1

Now, onward to see if I can find solution #2.

Well, it too me another 30 minutes or so, but I’ve successfully found solution 2. Interestingly, it is very similar to the first solution, if I hadn’t taken a picture of the first solution, I’m not sure that I would have know that the configuration was different. But, sure enough, it is different. The center cube is a little less covered with this solution, but it is still very pleasing to handle and display.

Warning: Spoiler Image Solution #2

Overall, a very fun and pleasing puzzle to work on and solve.

After sitting on this puzzle for another day, I decided to try to find the third solution. This one required covering the cube completely, but didn’t use the magnets. After about 10 minutes of fiddling, I was able to find the solution – it didn’t look pretty, but the cube was entirely covered.

So there you have it. 3 solution to one puzzle. I really enjoyed it and am happy to have it in my collection. The only question that remains is: Will we see another incarnation of this puzzle? A 7 or 8 piece configuration? I’m not sure that there is much left – and in fact, since I own, the 3,4,5 piece and surround, I could play with combining those to see if anything interesting happens.

## 2 Rings – Chi-Ren Chen

2 Rings is a puzzle that was made by Eric Fuller and was sold back in October. The October batch of puzzles at cubicdissection was especially strong and it seems to me that this puzzle didn’t receive the attention it deserved. I wanted to make sure I got this writeup in before it got lost in the never-ending wave of new puzzles.

Straight out of the gate, this puzzle is stunning. The wood choices are spot on and the craftsmanship is truly impressive. Eric spliced in these strengthening corner pieces (sorry don’t know the technical term) that add great accents, but also create an extremely strong and rigid frame. This is important with this puzzle because it is very easy to accidentally generate a lot of leverage and force while manipulating the two pieces. I can imagine that this exact puzzle built with lesser standards might snap or break if someone torqued on it enough.

Outside of the beautiful aesthetics, this is also a very fun puzzle to play with. I didn’t find it too difficult, but I really enjoyed that it stretched my thinking. There was something exciting about rotating the pieces in a 3 dimensional space and navigating this 3 dimensional maze. I also really like the fact that the puzzle has open sight lines. So many puzzles hide their movements inside a box, but here you can see everything and freely rotate the puzzle to view from all angles.

The puzzle arrived in a “incorrectly” completed state – that is, the two rings were together, but they were incorrectly oriented and the magnets were resisting each other. The first step was then to separate the rings. This was not too difficult of a challenge, but I wasn’t done yet. I still had to correctly assemble the rings. I made several attempts and several times found myself back at the beginning.

There is an obvious spot where the two rings can connect and disconnect. I found myself connecting them together, manipulating the rings through several moves and rotations to the point where I felt I was going to solve it – and then, suddenly, I’d be back at the connect/disconnect spot. Hmm. How frustrating!

After a few more attempts, I finally found my way to the end of the puzzle and that satisfying “snap” as the magnets came together. I would guess that there are a few separate solutions for this puzzle, and I’m not sure of the exact moves I used. I just kept moving forward and eventually found the solution.

As a kid, I always loved mazes and this puzzle brought me back to those roots. The two pieces have to be manipulated correctly through a sort of 3d maze. Since the magnets are visible, it is fairly obvious what the completed state will look like, so the difficulty lies in the journey to the completed state, which, in my mind, was very similar to solving a maze. Manipulate the pieces until a dead end is reached – backtrack to the previous junction, try the other path and continue on and on until the end.

Solving this puzzle is great – the two rings really “snap” together as the high strength magnets find each other. The magnets also make the first move very tricky to find when disassembling the puzzle. I’ve had this one sitting on the shelf for a few weeks and each time I pick it up, it takes me a few minutes to find the first move. It takes some real force in one specific direction to break them free.

To me this puzzle acts as a proof of concept. I think it is a clever idea with unique manipulations, but I also think that the idea could evolve into something even better. I’d love to see what “3 rings” would look like, or what if the voxels were smaller, or what if the faces were curved to invite unique rotations? I really think there could be many future possibilities using this same concept of open, interlocked rings.