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8355 Modified

blgentry

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Joined
Apr 10, 2008
Messages
263
Location
Miami, Florida
In another thread (easiest beginner method), brunson wrote:
I wondered if 8355 could be simplified even more. I just did two solves like this:
1) Solve all edges intuitively.

I was having a hard time understanding this, then I got it. ALL edges. I know you mess with block building methods, so maybe this was intuitive for you. For me, I had to do:

A. White cross (or whatever color).
B. (with cross on bottom) Three middle layer edges. I pretended I was doing keyhole, except all the holes were keyholes. :)
C. Solve 4 top layer edges (yellow in my case) by swapping them in and out of the keyhole edge. Once done, the keyhole edge is automatically in place. This is just like step three of 8355.

2) Solve the 3 corners in U with R' D' R D

This get a little weird as you are trying to solve only three and keep the keyhole corner open. Sometimes it wants to solve itself, or it's the only one you can easily solve. Either way, this isn't a big deal, just weird in some cases.

3) Flip the cube over and fix any edges that are wrong.

I've found that the "fix" is identical every time. Two edges in U are correct (after AUF). One is wrong and the other is in the keyhole. Do a 3 way swap, and all 4 are right in one "move".

4) Solve the new U layer just like the final step in 8355.

Yep. Works every time. This is a really interesting variation on 8355 IMHO.

I've added another variation: Don't solve the edges on the white layer to start. Just do three of the second layer edges (as in 1B. above). Then do the four top yellow edges (like in 1C. above, but with a few extra moves). Then go directly to step 2. Step 3 gets longer, as you have to rearrange more edges, but you know how to do that if you know how to do step 1C. Step 4 is the same.

I guess it's not that much different, but it skips having to explain keyhole, which was confusing to two people I tried to show. I like the succinctness of it.

I disagree. I think it's different enough to warrant more study and playing with it. My biggest question is, do you expect a beginner to be able to do all edges with pure intuition like Petrus? Or do you expect them to follow my A through C technique above? If so, 1B is kinda keyhole, just without rotating the keyhole around. They are both obvious to me, but I'm a cuber. <shrug>

My variation is definitely different, though I'm not sure it's all that useful. OTOH, since there's no bottom layer cross, doing the three second layer edges actually is intuitive.

I should try *not* fixing the edges after flipping over and see if that works.

It doesn't. :)

I'm curious what others think of this method, or what they might add to it, or change about it. Good stuff Senior Brunson!

Brian.
 
My main goal in this was trying to simplify the explanation. I liked it because it was one four move algorithm and four easily remembered steps.

I failed at teaching a neighbor to solve the cube, I think she got bored and overwhelmed with me explaining keyhole. I'm well on my way to teaching a co-worker 8355, but he's motivated because he's teaching his son and wants to impress him by being able to solve the cube.

He had a little bit of a struggle with keyhole edges. Most people I've talked with that know how to solve a cube fall into two categories, 1) have no intuitive feel for the cube and just do moves to accomplish their goal or 2) have a good intuitive feel but no recollection of what it was like to not have that understanding. To most of us I think it's difficult to put ourselves in the shoes of a person that can't figure out how to put an edge into a keyhole slot in the proper orientation. We "get it", they haven't yet.

I posted a response to someone's "Last 4x4 dedges" question and was surprised that when I said "just flip over the edge" they had no comprehension of what I was talking about. Luckily many others swooped in to offer a bunch of algorithms that will be sure to keep him in ignorance for even longer. This forum is awesome.
 
I teach keyhole by pointing to the FR piece while doing the three moves so the student can see how it works.
 
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