Guimond Method

2019-06-24T17:35:27Z

Cube-aroo: Just fixing gramar

{{Method Infobox
|name=Guimond
|image=Guimond.gif
|proposers=[[Gaétan Guimond]]
|year=1980s
|anames
|variants
|steps=3
|algs=23 (2 for beginner)
|moves
|purpose=
* [[Speedsolving]]
* [[Beginner Method]]

}}

The '''Guimond Method''' is a 2x2 speedsolving method invented by [[Gaétan Guimond]]. It first orients both layers, then permutes both layers ([[PBL]]). This method is very popular because it is move efficient, and can be reduced to a 2-look method for more experienced users. Guimond requires 23 algorithms (or 16 without reflections).

== The Steps ==

# Solve just 3/4 of a [[face]] of opposite colours. 'Opposite' colours are colours which appear at opposite ends of the cube. White/Yellow for example (western scheme). For colour neutral solvers this step is often skipped. If not it rarely requires more than 1 move, which makes for easy planning of the next step.
# Solve 2 opposite faces of opposite colours. This step has 16 cases (15 excluding solved, 8 excluding mirrors). The majority of algorithms are 3 or 4 moves, with the exception of 4 cases.
# Separate opposite colours to create two solved opposite faces. There are 6 cases (4 excluding the solved and trivial case, 3 if using x2 rotation). The optimal algs have a move counts of 1, 3, 3 and 5 moves.
# Permute both layers [[PBL]]. This is exactly the same as the final step in Ortega, making these two methods complementary.

== Guimond as a Beginner Method ==
Guimond makes a slightly more efficient and intuitive alternative to [[Beginner LBL]]. The beginner method procedure is as follows:

# Use intuition to orient three cubies on both U and D faces. Mixing U/D colours at this stage is fine, as long as each U/D face has three oriented cubies (ie. with U or D colour on top).
# Using a U face turn, place the misoriented U-face cubie in URF. Flip the cube using x2 and do the same for the opposite layer.
# Now check the orientation of the misoriented URF cubie. If the U/D colour is facing you, use x2 to flip the cube. Now the misorineted cubie should have the U/D colour facing to the right.
# Apply the algorithm '''R' F U' R''' to complete orientation of the U/D faces.
# Using F2 R2 and U moves, swap U/D cubies until the U-face contains only U colour.
# Now look at the U layer only
#* If you see 1 bar, position the cube (using y turns) so that the bar is in the back face. Apply the algorithm '''R' F R' B2 R F' R' B2 R2''' (A-perm).
#* If there are no bars apply A-perm to create a bar.
# Do x2 and repeat step 6 for the D layer to complete the cube.

== Guimond-style 3x3x3 Method ==
It is possible to solve the 3x3x3 cube using the same basic phases of the 2x2x2 Guimond method. The method is broken down into:
# Orientation of all the pieces
#* Orientation of edges (see [[EOLine]])
#* Orientation of corners (same as Guimond, but preserving EO)
# Separation of the U/D Layer
#* Move all mid-edges into E-slice
#* Corner Separation (same as Guimond)
#* Edge Separation
# Permutation of all the pieces
#* Final solve of E-Slice
#* U/D layer permutation (Using [[PLL]])

== Predicted Separation ==
This is a more advanced form of regular Guimond, which allows one look to be eliminated. During inspection the solver works out the separation case (step 2), so that the separation alg can be executed immediately after the first step, without pause.

== 2 Step Guimond ==
This goes one step further than predicted separation and actually carries out separation and orientation (steps 1 and 2) all at the same time. The solver starts with three corners, then uses a larger set of algs to solve orientation and separation in one step. This is similar to the [[SS Method]], but requires more algorithms.

== Ortega-style OLL ==
Where a scramble leaves one face with four oriented U/D corners, it is possible to simply use an Ortega OLL alg to bring the cube straight to the separation step. Because mixing of U/D colours doesn't matter in this step, slightly more efficient algorithms may be used. See [[OLL (2x2x2)#Mixing U/D|OLL (2x2x2)]]

== See also ==
* [[OLL (2x2x2)]]
* [[PBL]]
* [[LBL]]
* [[Ortega Method]]
* [[VOP Method]]

== External links ==

* [http://erikku.er.funpic.org/rubik/2x2_guimond.html funpic.org]
* [http://rapidshare.com/files/129358753/Guimond_Method-english.doc Martijn Bakker' doc on RapidShare]
* [http://www.amvhell.com/stuff/cubes/guimond/guimond.html Zarxrax's Complete Guimond Tutorial]
* Speedsolving.com [http://www.speedsolving.com/forum/showthread.php?t=13055 2 Alg Guimond]
* Speedsolving.com [http://www.speedsolving.com/forum/showthread.php?t=3566 What is the "fridrich" of 2x2x2 cubing?] (info on 2-step Guimond)
* Speedsolving.com [http://www.speedsolving.com/forum/showthread.php?t=15534 3x3x3 Guimond-style Method]

[[Category:2x2x2]]
[[Category:2x2x2 methods]]
[[Category:2x2x2 speedsolving methods]]
[[Category:Fewest Moves Methods]]

Layer by layer

2019-06-24T17:33:30Z

Cube-aroo: /* 2x2x2 LBL Method */

== 3x3x3 LBL Method ==
{{Method Infobox
|name=LBL (3x3x3)
|image=Layer_by_layer.gif
|proposers=[[David Singmaster]] and others
|year=1970s
|anames=Beginner's method, Samsara method
|variants=[[CFOP]], [[8355]]
|steps=5+
|algs=6+
|moves=80+
|purpose=
* [[Beginner method]]
* [[Speedsolving]]
}}

'''Layer-By-Layer''', or normally only '''LBL''' is a group of [[method]]s that solves the [[cube]] in layers. In the basic, [[3x3x3 beginner methods#Layer By Layer|beginner LBL method]], the solver finishes the layers one at a time: the [[first layer]] edges, then corners, then the second layer edges, and finally the [[last layer]]. This is a common method for new cubers to discover on their own. In more advanced LBL methods, you solve layers more efficiently or solve two layers at once. For example, in the [[CFOP method]], one solves the [[first two layers]] simultaneously by forming a [[cross]] of the first layer [[edge]]s, and then filling in four [[pair]]s of a [[corner]] and an [[edge]] into the so-called [[slot]]s.

There are many 3x3x3 methods that fully or partially use a LBL approach, including [[CFOP]], the method used by most top speedcubers in the world. Three examples of how cubers might approach LBL:

===Beginner 3x3x3 LBL===

With this method, the novice cuber truly completes each layer one after the other, using few algorithms (but taking perhaps over 100 moves). This is one of the most popular beginners' methods in existence.

* ( [[Daisy]] )
* Bottom layer: [[Corners XG]] ([[Cross]] plus Corners)
* Middle Layer: Insert the 4 middle layer edges (each edge is inserted individually)
* [[4-Look Last Layer]], sometimes actually more like 8-looks by re-using algorithms

===Intermediate 3x3x3 LBL===
At this stage the cuber may develop strategies such as keyhole to reduce middle layer moves, as well as learning further last layer algorithms.

* [[Cross]]
* [[Keyhole]] F2L
* [[4-Look Last Layer]]

===Advanced 3x3x3 LBL===
The advanced LBL cuber often uses [[CFOP]], employing fast, intuitive F2L techniques and learning many more last layer algorithms to reduce moves and improve speed further.
* [[Cross]]
* [[F2L]]
* [[OLL]]
* [[PLL]]

== 2x2x2 LBL Method ==
{{Method Infobox
|name=LBL (2x2x2)
|image=Lbl.gif
|proposers=none
|year=1970s
|anames
|variants=[[CLL]]
|steps=3
|algs=3+
|moves=25+
|purpose=
* [[Beginner Method]]
* [[Speedsolving]]
}}

As if you are solving the 3x3 using the Layer-By-Layer method.

Do the bottom layer first, then [[OLL (2x2x2)]], and last [[PLL (2x2x2)]].

__NOTOC__
 

==See also==
* [[OLL]] (3x3x3)
* [[PLL]] (3x3x3)
* [[OLL (2x2x2)]]
* [[PLL (2x2x2)]]
* [[Layer]]
* [[First Layer]]
* [[Last Layer]]
* [[4-Look Last Layer]]

== External links ==

===Web pages===

* [https://www.rubiks.com/blog/how-to-solve-the-rubiks-cube How to solve the Rubik's cube] The official beginner's guide on rubiks.com
* [http://peter.stillhq.com/jasmine/rubikscubesolution.html Jasmine Lee's Beginner Solution] Excellent beginner's solution, more concise than the rubiks.com version.
* [http://www.kungfoomanchu.com/guides/andy-klise-3x3x3-beginners-guide.pdf Andy Klise's beginner's guide] (pdf) A "cheat sheet" summary version of Jasmine Lee's page, with less explanation.
* [http://www.rubiksplace.com Beginners solution with animations] Excellent tutorial at www.rubiksplace.com
* [http://rubikscube.info/beginner.php rubikscube.info Beginner LBL for the 2x2x2]

===Video tutorials===

* [http://www.rubiks.com/Academy/Tyson%20Video.aspx Tyson Mao's tutorial on rubiks.com]
* [http://www.youtube.com/user/CubeRight#p/u/8/VVrOmmKnVjo CubeRight's Beginners Tutorial (HD)] Excellent tutorial, easy transition to Fridrich method.
* [http://www.youtube.com/watch?v=609nhVzg-5Q Badmephiosto's Beginners Tutorial] Quality tutorial, also designed for easy transition to Fridrich method
* [http://www.youtube.com/watch?v=HsQIoPyfQzM Dan Brown's Beginner Method] combines corner orientation/permutation into one step making the solve a little easier, but much slower and more difficult to transition to Fridrich (video)

[[Category:2x2x2]]
[[Category:2x2x2 methods]]
[[Category:2x2x2 beginner methods]]
[[Category:3x3x3 beginner methods]]
[[Category:2x2x2 speedsolving methods]]
[[Category:3x3x3 speedsolving methods]]
[[Category:3x3x3 Layers methods]]

Speedsolving.com Wiki - User contributions [en]

Guimond Method

Layer by layer