View source for Speed-Heise

{{Substep Infobox
|name=Speed-Heise
|image=speedheise.png
|proposers=[[Matt DiPalma]]
|variants=[[LPELL]], intuitive
|anames=Step 3 of [[Heise Method]], Heise 3/4
|year=2014
|subgroup=
|algs=24 (simplified) / 72 (full)
|moves=9.305 (Speed-Optimal [[HTM]])
|purpose=<sup></sup>
* [[Speedsolving]], [[FMC]]
|previous=[[F2L-1 + EO cube state]]
|next=[[L3C cube state]]
}}

'''Speed-Heise''' is an algorithm set developed by [[Matt DiPalma]] for use with methods that pre-orient the edges before the [[last slot]] ([[ZZ]], [[Petrus]], [[Heise]]). During the last F2L insertion, Speed-Heise solves all 4 LL-edges and 1 LL-corner. This leaves the cube in a state that can be solved with a single, intuitive [[commutator]]/conjugate, known as [[L3C cube state]] which can be finished with [[Last Three Corners|L3C step]]. The algorithm set is essentially an expansion of [[LPELL]] with a large boost in efficiency. There is also a 1/27 chance of skipping the [[Last Layer]].

After finishing [[F2L-1 + EO cube state|F2L-1+EO]], the final pair is created in the U-layer and AUFed to the Front-Right, as in [[Winter Variation]]. Then, the permutation of LL edges is recognized, exactly as [[LPELL]]. Then, the sticker at DFR is identified and the destination of this sticker (12 possibilities, but 4 for the simplified case) is recognized. These two pieces of information are used to identify the Speed-Heise case, which will insert the pair, solve the LL edges, and correctly place the corner at DFR. Finally, the appropriate algorithm is executed, leaving the cube only a short, ergonomic sequence from solved.

The full version (72 algs) accommodates any orientation of the DFR corner. A simplified version only considers the 24 cases in which the DFR corner is oriented facing downwards. Both versions are included in the external links, below.

The movecount may be significantly reduced by intelligent algorithm selection, as discussed on the Complete Speed-Heise page, linked below.


== External links ==
* [https://dipalm.wordpress.com/2015/03/04/complete-speed-heise/ Complete Speed-Heise]
* [https://dipalm.wordpress.com/2015/03/03/speed-heise-algorithms-en/ Simplified Speed-Heise]

[[Category:3x3x3 last slot substeps]]