Puzzled 2: Moyu Fisher Time Wheel

Friday, May 8, 2020

Moyu Fisher Time Wheel

After spending some time getting better acquainted with the Tangram Cube, I finally put it away and grabbed another puzzle. It was partially scrambled so I started by scrambling it more thoroughly. What a mess! When solved it is a perfect cube, but when scrambled it is quite the jagged mess. At this point I can't even tell you what the puzzle is. I do not remember its name. By the time I post this entry I'm sure I will have found out and put it in the title of the post. I can say that I solved the cube using a lot of Up Replace Down Replace Up Goback Down Goback commutator 3-cycles.

Nowadays this is called the Moyu Yileng Time Wheel. I bought it from Speedcubeshop in October 2017. On November 6, 2017 I posted the following:

I got a new puzzle. Rline did an unboxing and I liked the looks of it. It hasn't disappointed. I haven't worked out a system for solving it yet and may not ever. It is just fun to mess with. I have fully scrambled and solved it. Let's see...
It is like a Fisher Cube, you know the shape mod of a 3x3x3 that can be slippery and hard to control. It could be scrambled and solved exactly like one. But there are circles on the top and bottom faces and on each edge of the 4 vertical sides that can be turned manually giving each ... How should I explain this?
8 of the edges of the puzzle solve like corners of a cube. On a Fisher cube each edge is one piece. On the MoYu Fisher Time Wheel each of these pieces are cut by circles so that there are 3 extra pieces.
Trying to describe this is crazy. I'm just going to say that there are 54 extra little pieces to solve above and beyond a 3x3x3 cube or 3x3x3 Fisher Cube. I don't even want to try to describe at this point how I have gone about solving it.

Back to 2020 thoughts. As far as a solution strategy... I'm thinking that the centers, edges, and corners of the Fisher cube can be solved like a normal Fisher cube. When this is accomplished everything outside the circles along with the centers of the circles will all be solved. The next step is to focus on the horizontal and vertical pieces inside the circles. These can be solved with Up Replace Down Goback or simply Up Replace Down. Then the small roundish triangular parts of the circles can be solved using the 8-move commutator I am so fond of—Up Replace Down Replace Up Goback Down Goback.

Here it is with a scramble:

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Rubik's Cube Books

I got my first Rubik's Cube in the early nineteen eighties. The only way I could solve it was to take it apart and put it back together solved. Until, that is, I got some little books that explained sequences of moves that could be used to put pieces where you want them without messing up what was already in place.

The Simple Solution To Rubik's Cube
by James G. Nourse
Notes on Rubik's Magic Cube
by David Singmaster
Solve That Crazy, Mixed-up Cube Puzzle
by Don Frederick.

I think I put together my own strategy using bits and pieces gleaned from all three books. Eventually I lost interest and forgot how to complete the cube, forgot I had those books, and lost track of the cubes.

Mark Jeays' Working Corner Method

http://jeays.net/rubiks.htm

In 2007 my interest in Rubik's Cube was rekindled when I watched the movie The Pursuit of Happyness. Marae found my 1980s cube for me and I tried to solve it. Huh-uh. I could do part of it, but not the last layer. Looking online I found various tutorials. Mark Jeays included YouTube videos with his Solution 2. This method worked for me and although I no longer use it in its entirety, nor could I, as I have forgotten the yellow edges sequences, I still find the basic working corner technique helpful, and use a slightly modified version of his corner twisting technique at times.

In the summer of 2014 we packed 30 or so puzzles and flew to visit Raymond and Fam in the Czech Republic. Breann, who had learned this method and no other, made some comment about bubururu or something like that, and it piqued my curiosity. What were those algorithms, and how similar are they to the EPS technique I use now when using a working corner? So I looked them up. Actually, the three algorithms were for dealing with the two last edges solved, which either needed to be swapped, or flipped, or swapped and flipped. The swapper is very similar to the one I have learned and used since, but I actually like it better in one sense, with a slight modification.

To swap UR and FR without flipping:

U' R U' R' U' R U' R' U'

To swap and flip UR and FR:

F' U' F U' F' U' F U2

To flip UR and FR:

F' U F U' R U' R' U

Will I actually learn and use these? Probably not. But I like them. :)

There is a slightly different implementation of the Working Corner Method. Arnaud van Galen calls it the Keyhole Method. I like his demonstration better than the one I originally learned. It just dawned on me why he is able to get away with doing it the way he does. He goes ahead and finishes the F2L before going to the last layer, unlike the way Jeays uses the working corner (keyhole) to also get the last layer. Since I no longer use the working corner to get the last layer, I should implement Arnaud's technique.

Jasmine's Scalable Method

http://peter.stillhq.com/jasmine/rubikscubesolution.html

This was the next method I learned. For awhile the idea of speed cubing appealed to me. This promised to be a good beginner's method for those that wanted to go on to faster method's later. Now that I know what I know, I wouldn't recommend this method if your goal is to be able to consistently solve the cube in less than 30 seconds. Rubik's Speedsolver Champion Leyan Lo presents a beginner's method that I like the looks of although I've never learned it. I have recently watched Arnaud van Galen's complete beginner's method video series and recommend them. Gilles Roux presents a beginners' method that is very close to one of my favorite ways of solving the cube. The simplicity and comprehensibility make this method a good place to start if you want to understand the Rubik's Cube. Also, if you are interested in speedcubing you should check out this YouTube video.

After trying for months to get under a minute with both Jasmine's Method and the Corner's First Method—and failing, I finally decided to quit trying and just enjoy cubing at a nice slow pace.

Don't get me wrong. Jasmine's Method has its merits. The sequences for orienting the last layer edges and corners, and permuting the last layer edges are still in my arsenal of useful algorithms.

Adam Cheyer's Corners First Method

Philip Marshall's Ultimate Solution

http://helm.lu/cube/MarshallPhilipp/
After learning to solve the cube corners first, what is next? An Edges First Method! This was a very difficult tutorial to follow, but once I got it, it was my favorite way to solve the cube for awhile. It uses only a few algorithms, and when you are finished solving the cube you feel like you've solved the puzzle, not just used memorized sequences to unscramble it.

Gilles Roux presents a beginners' method that could be used to solve the cube edges first. The simplicity and comprehensibility make this method a good place to start if you want to understand the Rubik's Cube. His technique is much easier to follow than Marshall's.