8355 Method

2018-08-10T13:26:19Z

FinallySub20: /* External links */

{{Method Infobox
|name=8355
|image=8355_method.gif
|proposers=[[Reheart Sheu]]
|year
|anames
|variants=[[Sexy Method]], [[MirIS]], [[Y-Move Method]]
|algs=1 to 3
|steps=6
|moves=100+
|purpose=<sup></sup>
* [[Beginner method]]
}}

{{Method Header
|listofsteps=[[Cross]] -> [[3C]] -> [[+3E edg keyhole]] -> [[F2L-1:+5E]] -> [[5CM:Sexy*+S]]
|description=The [[8355 Method]] is a [[:Category:3x3x3 beginner methods|3x3x3 beginner method]].
}}

The '''8355 Method''' is a [[:Category:3x3x3 beginner methods|3x3x3 beginner method]] invented by [[Reheart Sheu]]. It is similar to [[Layer by layer]] but uses much fewer algorithms.

==Procedure==

===[[Cross|'''Solve the cross''']]===
''(intuitive)'' Use the [[Cross]] step to have the [[Cross cube state]].

===[[Cross:3C|'''Solve 3 corners''']]===
Use the [[Cross:3C]] step to have the [[1st Layer-1C cube state]] :
* ''(Beginner)'' Holding the cross on D, place D-layer corners above their position in the U-layer and repeat the [[sexy move]] ('''R U R' U'''') until placed.
* ''(Advanced)'' Intuitive

===[[+3E edg keyhole|'''Solve 3 E-slice edges''']]===
Use the [[+3E edg keyhole]] step to have the [[F2L-1 cube state]] (see [[Keyhole]] method)
(Or by application of the alg '''R' U' R' U' R' U R U R''' and/or its mirror '''L U L U L U' L' U' L' ''')

===[[F2L-1:+5E|'''Solve remaining edges''']]===
Use the [[F2L-1:+5E]] step to have the [[5 Corners Missing cube state]]:
* ''(Beginner)'' This can be done in 2 substeps ([[8355 keyhole method]]) :
** [[F2L-1:+3U edg|'''Solve 3 U-layer edges''']]: (intuitive) Hold the remaining unsolved corner+edge positions in the front-right. Using R or F', place a U-layer edge into the correct position. Now twist the U layer to replace it with an unsolved U-layer edge and undo the original R' or F move. Repeat until 3 U-layer edges are solved.
** [[F2L-1+3U:Last 2edg|'''Solve the final 2 edges''']]: Swap the FR E-slice edge with the edge in UF without disturbing the other edges using the alg '''R U R' U R U R' ''' or its mirror '''F' U' F U' F' U' F''', depending on the orientation of the edge in the slot.

===[[5CM:Sexy*+S|'''Solve the final 5 corners''']]===
Use the [[5CM:Sexy*+S]] step to have the [[Solved cube state]]:
Flip the cube over so that 4 of the remaining corners are in the D-layer and the other remaining corner is in the FR position of the U-layer. The corner in the U layer will be used as a 'buffer'.
# If the corner in the buffer does not belong in the D-layer apply the alg '''R U R' U' ''' (the [[sexy move]]) once to place a D-layer corner into the buffer.
# Twist the D-layer until the corner in the buffer position is directly above its correct position in the D-layer.
# Repeat the alg '''R U R' U' ''' until the corner in the buffer position is placed correctly in the D-layer.
# Repeat steps 1 to 3 until only 1 unsolved corner remains in the D-layer.
# Position the final unsolved D-layer corner under the buffer piece.
# Repeat the alg '''R U R' U' ''' until either the whole cube is solved or only 2 unsolved corners remain. If the final D corner is solved resulting in a fully solved D layer but the rest of the cube is unsolved, '''continue applying the algorithm''' until you are left with two unsolved corners, then continue with the instructions below.
# Rotate the whole cube so that the D-layer now contains the 2 unsolved corners, re-assigning a solved corner in the U-layer as the new buffer piece.
# Repeat steps 2 and 3 until the cube is solved.

==Advancements==
There are a number of advancements which can be made to lower the move-count and improve speed of execution. Here are a few of them:
* '''Solving the Cross''': Minimise move count and plan the entire cross during inspection
* '''First 3 Corners''': Use the inverse of the sexy move to reduce the number of repetitions required. For maximal efficiency, depending on the corner orientation use one of:
:* '''R U R''''
:* '''F' U' F'''
:* '''R B U2 B' R''''
* '''Solve 3 E-slice edges''': Combine first 3 corners and edges into one step by joining corner + edge pairs in the U-layer and inserting as a pair, see [[F2L]]
* '''Solve U-Layer edges''': Try also building corner/edge pairs while solving the edges to reduce the number of corners left at the end, see [[Heise Method]].
* '''Last 5 corners''': Use the inverse of the sexy move ('''U R U' R'''') for corners requiring 5-repetitions of the sexy move. More advanced: Use more efficient [[commutators]] to solve several corners simultaneously. See last step of [[Heise Method]].

== Example Solves ==

===A Complete Solve===

Scramble: F2 D' B2 R2 B2 D U2 L2 U' B2 F D2 B D2 R2 U' F R F' L' D'

* Cross (intuitive): '''R' L' F U L R2 B2'''

* Insert 3x D-layer corners:
# '''(RUR'U')'''
# '''y' (RUR'U')'''
# '''y' d (RUR'U')*3'''

* Insert 3x E-slice edges:
# '''y2 (R'U'R'U'R'URUR)'''
# '''d2 (R'U'R'U'R'URUR)'''
# '''y' U' (R'U'R'U'R'URUR)'''

* Place 3x U-layer edges (intuitive):
:'''y2 U2 R U' R' . y L' U L'''
* Bring final U-layer edge into slot:
:'''y' (RUR'URUR')'''
* Now insert it into position:
:'''y U (L'U'LU'L'U'L)'''

* Flip cube over to solve final corners:
# '''x2 y2 D (RUR'U')*3'''
# '''D (RUR'U')'''
# '''D2 (RUR'U')*5'''
# '''D2 (RUR'U')*3 D2'''

[http://alg.garron.us/?alg=R-_L-_F_U_L_R2_B2_._(RUR-U-)_._y-_(RUR-U-)_._y-_d_(RUR-U-_RUR-U-_RUR-U-)_._y2_(R-U-R-U-R-URUR)_._d2_(R-U-R-U-R-URUR)_._y-_U-_(R-U-R-U-R-URUR)_._y2_U2_R_U-_R-_._y_L-_U_L_._y-_(RUR-URUR-)_._y_U_(L-U-LU-L-U-L)_._x2_y2_D_(RUR-U-_RUR-U-_RUR-U-)_._D_(RUR-U-)_._D2_(RUR-U-_RUR-U-_RUR-U-_RUR-U-_RUR-U-)_._D2_(RUR-U-_RUR-U-_RUR-U-)_D2&ini=F2_D-_B2_R2_B2_D_U2_L2_U-_B2_F_D2_B_D2_R2_U-_F_R_F-_L-_D-&scheme=brogwy Click for animation]

===Final 5 Corners: dealing with 2 unoriented corners===

Scramble: R U R' D R U' R' D' R U R' D' R U' R' D

* '''D' (R U R' U')''' - first corner
* '''D (R U R' U')''' - bring second corner into buffer
* '''D (R U R' U')*5''' - solve second corner
* '''D' (R U R' U')''' - third corner. Notice, the corner is solved but the rest of the cube is scrambled.
* '''(R U R' U')*4''' - repeat alg until the cube is solved except for two unoriented corners.
* '''x'''' - re-assign d-layer to contain the 2 unsolved corners.
* '''(R U R' U')*4''' - solve the first one
* '''D' (R U R' U')*2''' - finally, solve the second one.

[http://alg.garron.us/?alg=D-_._R_U_R-_U-_._D_R_U_R-_U-_._D_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_._D-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_._x-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_._D-_R_U_R-_U-_R_U_R-_U-_D&ini=R_U_R-_D_R_U-_R-_D-_R_U_R-_D-_R_U-_R-_D&scheme=brogwy Click for animation]

===Final 5 Corners: another example===

Scramble: D2 R U R' D R U' R' D' R U R' D' R U' R' D'

* '''D (R U R' U')''' - first corner.
* '''D (R U R' U')''' - bring second corner into buffer.
* '''D (R U R' U')*5''' - solve second corner.
* '''D' (R U R' U')*5''' - attempt to solve third corner. Not possible, so repeat until only 2 unsolved corners remain.
* '''x'''' - rotate cube so that 2 corners are in the D-layer.
* '''(R U R' U')*4''' - solve first unoriented corner.
* '''D' (R U R' U')*4 D''' - solve second unoriented corner.
* '''x D2''' - fix bottom layer.

[http://alg.garron.us/?alg=D_R_U_R-_U-_._D_R_U_R-_U-_._D_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_._D-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_x-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_R_U_R-_U-_D-_R_U_R-_U-_R_U_R-_U-_D_x_D2&ini=D2_R_U_R-_D_R_U-_R-_D-_R_U_R-_D-_R_U-_R-_D-&scheme=brogwy Click for animation]

== See also ==
* [[Layer-By-Layer]]
* [[Keyhole Method]]
* [[Sexy Move]]
* [[Y-Move Method]]

== External links ==
* Speedsolving.com: [http://www.speedsolving.com/forum/showthread.php?t=10158 8355 method: easy way to solve cube?]
* Speedsolving.com: [http://www.speedsolving.com/forum/showthread.php?t=11654 8355 Modified]
* Speedsolving.com: [http://www.speedsolving.com/forum/showthread.php?t=19785 8355 - Problems with last 5 corners]
* [http://teach.ymhs.tyc.edu.tw/t1086/RC/l3-8355/8355.htm Chinese Tutorial]
* [http://translate.google.com/translate?prev=hp&hl=en&js=y&u=http%3A%2F%2Fteach.ymhs.tyc.edu.tw%2Ft1086%2FRC%2Fl3-8355%2F8355.htm&sl=zh-CN&tl=en&history_state0= Chinese Tutorial] (translated to English)
* [http://chcooboo.blogspot.com/2008/01/8355_29.html Chinese Video]
* [https://www.youtube.com/watch?v=1jYZBhnBdmE&list=PLDHYNpVcdbTEKDLg0kwxSxWTgUkm4izu8 German Tutorial]

[[Category:3x3x3 methods]]
[[Category:3x3x3 beginner methods]]

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8355 Method