Speed-Heise

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Speed-Heise
[[Image:]]
Information
Proposer(s): Matt DiPalma
Proposed: 2014
Alt Names: Step 3 of Heise
Variants: LPELL, intuitive
Subgroup:
No. Algs: 24 (simplified) / 72 (full)
Avg Moves: 9.305 (Speed-Optimal HTM), less if ur smart
Purpose(s):
Previous state: unknown
Next state: unknown

Previous cube state -> Speed-Heise step -> Next cube state


The Speed-Heise step is the step between the Previous cube state and the Next 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. The algorithm set is essentially an expansion of LPELL with a large boost in efficiency.

After finishing EOF2L-1, the final pair is created in the U-layer and AUFed to the Front-Right, as 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) is observed. These two pieces of information are used to identify the Speed-Heise case, which will insert the pair, solve the LL edges, and 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 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