Winter Variation

2013-11-26T06:44:21Z

Brian724080:

{{Method Infobox
|name=WV
|image=winter_variation.gif
|proposers=Lucas Winter
|year=2005
|anames
|variants
|steps=1 substep
|algs=27 (excluding mirrors)
|moves=8.07
|purpose=<sup></sup>
* [[Speedsolving]]
}}

'''Winter Variation''', abbreviated as '''WV''', is a system for orienting the [[Last Layer|last layer]] corners during insertion of the final [[F2L]] slot. It is generally used in conjunction with methods in which the last layer edges are already oriented before insertion of the final F2L block, such as [[ZZ]] or [[Petrus]].

WV may only be used in last slot cases where the final corner-edge pair are already connected in the U-Layer. In the R U R' case Summer Variation can be applied. After using WV, all the pieces will be correctly oriented in the last layer, and the solver must use [[PLL]] algorithms to correctly position them.

There are 27 Winter Variation algorithms total, one for each configuration of corner orientations. WV cases are set up so there is a corner-edge pair in the top layer to be placed in the final slot. Recognition of cases is typically done by looking at 3 of the corners in the top layer (the last corner's orientation is always dependent on the other 3). Since the last slot can potentially be in 1 of 4 positions, the solver must readily be able to recognize mirror cases and apply mirror algorithms in order to use WV.

The benefit to learning WV is that the solver uses fewer moves than directly placing the final c/e pair and using standard [[OCLL]] algorithms. The average move count for optimal WV algorithms is 8.07. In addition, PLL algorithms are generally well known, since PLL is the last step of the popular [[Fridrich]] method.

The original description and rationale for this variation can be seen in the yahoo speedsolvingrubikscube group [http://games.groups.yahoo.com/group/speedsolvingrubikscube/message/14346 here].

== See also ==
* [[Partial Corner Control]]
* [[Summer Variation]]
* [[ZZ-blah]]
* [[CLS]]
* [[EJLS]]
* [[Advanced F2L]]

== External links ==
* [http://games.groups.yahoo.com/group/speedsolvingrubikscube/message/14346 A variation on the Petrus Method] - initial proposal of the method
* [http://pagesperso-orange.fr/absolutemind/f2ll-angl.htm Sebastien Felix's WV Page]
* [http://web.mac.com/teisenmann/Tripod/winter.html Jack Eisenmann's WV Page]
* [http://dragoncube.org/vh_f2l.html Dragon Cube WV Page]
* YouTube: [http://www.youtube.com/watch?v=V2uIqju7ZJo F2LL Winter Variation]
* Speedsolving.com: [http://www.speedsolving.com/forum/showthread.php?t=14096 F2LL winter variation, is it worth learning?]

[[Category:3x3x3 last slot substeps]]

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Winter Variation