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Speedcubing: Solving the Rubik's Cube > Beginners Central > Keyhole Method/Working Corner method


Title: Keyhole Method/Working Corner method
Description: Need a little more help


InfiniteZero - March 10, 2007 12:46 AM (GMT)
For the keyhole method I understand this much.

1) Cross on bottom
2) get three corners

and the rest I don't fully understand

(this is the intermediate keyhole method)

Do you get the under the missing corner edge by R U' R and then get the other three edges normally, or is there a special way to get the other edges. I don't really understand how this increases your time to do the F2L that quick.

dChan - March 10, 2007 02:15 AM (GMT)
Here is how it works. Do Uw(that means move The up layer AND the middle layer otherwise know as the E slice or d slice) until you have a part where there is no edge there(not the edge above the working corner, another edge.) For example if you didn't solve the Orange-Blue-Yellow corner then forget about solving the yellow-blue edge. Do Uw till you have another edge to solve, like say the orange white edge is missing. Make sure you have positioned the orange-white edge on the U layer . Now do U until the orange side is touching the white centerpiece or the white side of the orange-white edge is touching the orange center piece. Now you should be able to solve the edge intuitively using no more than 4 moves.

Here is a reall quick example. Do R U R' on your cube(white on front, blue on top). Now rotate your cube so that there is anothe color on F but Blue still on top. Do R U R' again. Pretend this is where the working corner is and do Uw' so the gap where the red and white corner should be is above the working corner. Now I position the edge with U'. Now I place it with R U' R' and do Uw to put the edge ove the correct place. Pretend the corner under which the edge you just placed is already solved. Now here is how you solve the corner and edge that you have not placed yet. If you've followed my instructions then the proper corner should be directly above the correct position. So I do F' U' F to place the corner. Now I place the edge that belongs above that corner the regular way.

This is the beginner way, the advanced version requires 5 more algs for F2L and the placement of all 4 edges this way. The 5 algs are to place the working corner.

I hope this helps.

pyrotek7x7 - March 10, 2007 02:40 AM (GMT)
It isn't too hard, I found it out on my own in about 15 minutes. All you need is R U R' and F' U' F, as said before.

InfiniteZero - March 10, 2007 03:40 AM (GMT)
HOLY!!!!!!!!!!!!

I JUST GOT IT! YAY!!!!! :lol: :lol: :lol: :lol: :lol:

dChan - March 13, 2007 10:06 PM (GMT)
LOL, good job man.

Tomarse - April 7, 2007 11:16 PM (GMT)
Thats a right mission, i have no clue wit hthat method.

zuko - April 8, 2007 02:49 AM (GMT)
QUOTE (Tomarse @ Apr 7 2007, 11:16 PM)
Thats a right mission, i have no clue wit hthat method.

you aint the only one, half of the advanced methods i dont understand, mostly b/c of the notations but some are just ot many alg's.

AvGalen - April 8, 2007 09:55 AM (GMT)
I made a video and finaly found the time to put it up on youtube: http://www.youtube.com/watch?v=VQ-qIyScA5o

Erik - April 8, 2007 10:31 AM (GMT)
Nice video! I like your accent ;)

AvGalen - April 8, 2007 11:10 AM (GMT)
Thanks! I didn't have a storyboard for this, I just explained things as I did them. Sometimes I say stupid things like "This one is already wrong".

Some more videos will be coming soon. One for "5x5x5 edge-pairing 2 edges at a time (beginner)" which is basically the method I am trying to tell everyone about (only for beginners I use an extreme amount of setup-moves to make it easier). Also I will post videos about 5x5x5 centers, but they are beginners only.

doubleyou - April 9, 2007 09:29 PM (GMT)
that was a very nice video AvG!!

the way I learned the keyhole with Jeyns guide and watching Joel van Noort's vids on it. but it is always great to watch/hear another ones thoughts!

your 5x5 vids are great too! they really opened up doors for me!
you are from Netherlands right?

AvGalen - April 9, 2007 09:53 PM (GMT)
Glad you like them. More to come, but I don't have a camera myself. Next weekend probably.

I am from the Netherlands indeed. Many people don't seem to know you can click on a username to go to http://z12.invisionfree.com/rubiks/index.php?showuser=135. Where are you from? All I could see is your timezone is 2 hours apart from mine.

karthikputhraya - April 11, 2007 10:49 AM (GMT)
Hey
The video was really good.Thanx for the method.

doubleyou - April 11, 2007 01:14 PM (GMT)
I am from Denmark! (sorry to go off topic)

PLEASE make more videos AvG!! :)

could you make a friedrich F2L video too? A run thru, where you explain what you think as you go..

"I see this is piece is over a free slot, therefor I do this" etc etc
with small tricks etc.

AvGalen - April 11, 2007 02:56 PM (GMT)
I will eventually make a Fridrich F2L video, but I don't even know Fridrich F2L right now.

I am thinking of making a "the route to speedcubing" video series, at least for the 3x3x3 and maybe even for other cubes. This would start with a tutorial for everyone that never solved a cube before and end with Full Fridrich (eventually). I don't know if such a video for OLL/PLL would be interesting, because that is basically just learning algs.

karthikputhraya - April 11, 2007 04:06 PM (GMT)
@AvGalen
I saw your video and followed it fully and even could make out that the keyhole steps save a lot of moves but surprisingly when I tried it I took more time than the usual method as I had difficulty in spotting the edges quickly and sometimes I would turn the wrong face around while fixing the edges.

Erik - April 11, 2007 04:20 PM (GMT)
New methods always take more time in the beginning :D

AvGalen - April 11, 2007 10:22 PM (GMT)
QUOTE
sometimes I would turn the wrong face around while fixing the edges.


I have 3 tips for you about the edges (I am assuming the "standard color scheme DFRBLU=WRGOBY so White on Down, Red on Front, Green on Right)

1) Edges that have yellow on them belong in the Up-layer so only focus on edges without yellow to put them in the middle layer
2) Make sure your edge is not "connected" to its middle layer face
3) Turn that middle layer face that can connect to the edge so your "working corner" goes to the U-layer, connect the edge by turning the U-layer, undo your first move. Because this is a bit theoretical, I will describe two cases for the FR-edge
3a) Example-scramble: F' U2 F. The non-U-color of the edge (red) can be connected to the Front-face. This means we have to turn the Front-face in a way that puts our working corner in the U-layer (F'). Now we turn the U-layer to connect the edge to its face (U2). Finaly we undo the first move (F)
3b) Example-scramble: R U2 R'. The non-U-color of the edge(green) can be connected to the Right-face. This means we have to turn the Right-face in a way that puts our working corner in the U-layer ®. Now we turn the U-layer to connect the edge to its face (U2). Final we undo the first move (R')
3c) Example scramble (advanced!): L F U F2 U2 L'. Your working corner is now at the DLB position and you want to put the edge that is now in the FU position into the LB postion. The non-U-color of the edge (blue) can be connected to the Left-face. This means we have to turn the Left-face in a way that puts our working corner in the U-layer (L). Now we turn the U-layer to connect the edge to its face (U). Final we undo the first move (L')

I hope this helps and Erik is right. When I switched from a beginners method to working corner, my times increased by 10 seconds, but that only took 1 day. 2 days later, my times were 5 seconds faster than before.

Erik - April 16, 2007 12:17 PM (GMT)
You can also do reversed working corner...
Making 3 edges ot 2nd layer then 4 corners on the first layer and then the final edge...

AvGalen - April 16, 2007 12:55 PM (GMT)
Nice idea Erik, I will have to experiment with that. I don't really see the advantage, but I don't see a disadvantage either. Maybe a choice between the two, depending upon the pieces that are already correct after the cross would be a good idea? Or maybe even "free-style" keyhole could be fast, where you just insert an edge or corner arbitrarely so you can do the fastest insertion first and (hopefully) transform the slower cases to faster cases in the proces.

I have experimented with "free-style" keyhole when I was testing the amount of moves that would be necessary for keyhole compared to Fridrich. It saves a couple of moves, but because it is more difficult to remember which pieces have been done already, I didn't think it would be faster.

The advantage of doing 3 corners first is that it is pretty easy to do a "keyhole-x-cross". This means you already place 1 (or more) corners during the creation of the cross.

Erik - April 16, 2007 03:05 PM (GMT)
I just realized I was using this partial for shortcuts for F2L quite a while :)

AvGalen - April 16, 2007 04:17 PM (GMT)
Yes, that is the strange thing about F2L:
First you start with a beginners method: 4 corners, 4 edges
Then keyhole: 3 corners, 3 edges, 1 corner, 1 edge
Then intermediate keyhole: 3 corners, 4 edges, 1 corner
Then advanced keyhole: 3 corners, 4 edges (last one can be flipped, use easy Fridrich F2L cases), 1 corner
Then Fridrich: 4 *(1 corner+1 edge)
Then Fridrich + empty slots
Then Fridrich + empty slots + semi-empty slots (aka keyholes)

I am hoping that after I learn Fridrich, I will still be able to use empty slots and semi-empty slots like I can do now.

Erik - April 16, 2007 04:43 PM (GMT)
yes but the difference is that you'll only use that in case an edge or corner is good by itself...

Arakron - April 18, 2007 12:55 PM (GMT)
QUOTE (Erik @ Apr 16 2007, 04:43 PM)
yes but the difference is that you'll only use that in case an edge or corner is good by itself...

What if both are in place in the wrong slot?
Corner in FRD, matching edge in FL, pair goes in BR slot - D' R U R D then insert. Would you do that differently?

AvGalen - April 19, 2007 10:30 AM (GMT)
QUOTE
Corner in FRD, matching edge in FL, pair goes in BR slot - D' R U R D then insert. Would you do that differently?

With that many corner-edge pairs not mad yet and so many F2L pieces already in the (wrong) F2L slots, it is very likely that 1 or 2 pairs are ready to be made from the U-layer. Otherwise, your approach sounds good, but you probably mean D' (R U R') D




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