https://www.speedsolving.com/wiki/api.php?action=feedcontributions&user=Cyragia&feedformat=atomSpeedsolving.com Wiki - User contributions [en]2021-01-21T17:53:19ZUser contributionsMediaWiki 1.34.0https://www.speedsolving.com/wiki/index.php?title=ZZ_method&diff=23178ZZ method2013-07-30T19:31:06Z<p>Cyragia: added a link to my ZZ-Orbit guide</p>
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<div>{{Method Infobox<br />
|name=ZZ<br />
|image=Eoline.gif<br />
|proposers=[[Zbigniew Zborowski]]<br />
|year=2006<br />
|anames=<br />
|variants=ZZ-[[VH]], ZZ-a, ZZ-b, ZZ-c, ZZ-d, ZZ-Orbit, ZZ-[[WV]], [[MGLS-Z]], [[EJLS]]<br />
|steps=3 or 4 (depending on LL)<br />
|moves=44 to 55 depending on varient<br />
|algs=20 to 537<br/>F2L: 0 to 40 <br/>LL: 20 to 497<br />
|purpose=|purpose=<sup></sup><br />
* [[Speedsolving]]<br />
* [[Fewest Moves]]<br />
* [[One-Handed Solving]]<br />
}}<br />
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The '''ZZ method''' is a 3x3 speedsolving method created by [[Zbigniew Zborowski]] in 2006. The method is focused both on low move count and high turning speed; during the majority of [[F2L]], the solver only needs to make L, U, and R moves, which means that the solver's hands never leave the left and right sides of the cube, resulting in faster solving. In addition, edges are already oriented when the solver reaches the last layer, meaning the solver has fewer cases to deal with.<br />
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==The Steps==<br />
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* '''[[EOLine]]:''' This is the most distinctive part of the ZZ method. In this step, the solver orients all the edges while placing the DF and DB edges. The two edges and the bottom centre are the "line" in [[EOLine]]. This step puts the cube into an <L, U, R> group, meaning F, B, or D moves are not required for the remainder of the solve. Although this step may seem like a hinderance, it speeds up the F2L and LL.<br />
* '''F2L:''' The solver creates a 2x3x1 block on each side of the line via blockbuilding. Because one only needs to do L, U, and R moves, solving is very quick.<br />
* '''LL:''' The solver uses algorithms to solve the remaining pieces. Since the edges in the LL were oriented during EOLine, it can be completed in fewer moves and/or with fewer algorithms to learn.<br />
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==Variants==<br />
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There are several variations of the ZZ method, each of which treats the [[F2L]] and [[LL]] differently:<br />
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====Solving F2L and LL separately====<br />
* '''[[OCLL]]/[[PLL]]''' The LL is completed by first orienting the corners (OCLL), and then permuting corners and edges (PLL). This is the least algorithm intensive 2-look method for solving the last layer.<br />
* '''[[OCELL]]/[[CPLL]]''' This is similar to using [[COLL/EPLL]], but more of the algorithms can be [[2-gen]]. First the LL corners are oriented and LL edges are permuted in one step, then the cube is completed with CPLL in the final step.<br />
* '''ZZ-a:''' [[ZBLL]] is used to complete the last layer in a single step, also known as [[1LLL]] (one-look last layer). There are 494 cases, solvable by 177 algorithms, in an average of ~12.08 moves.<br />
* '''[[COLL]]/[[EPLL]]'''<br />
* '''[[NMLL]]''' completes the last layer when matching or non-matching blocks are used. The first step separates the colors belonging to the left and right layer. The second finishes permutation.<br />
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====Influencing LL during F2L====<br />
* '''ZZ-b:''' During F2L, the solver employs a technique called [[Phasing]] to correctly permute two opposite LL edges. Before the last corner-edge pair is placed, the solver uses one of several algorithms depending on how the edges are positioned. The last layer is then completed with one look using [[ZZLL]].<br />
* '''ZZ-[[WV]]:''' Before the last corner-edge pair is placed, the solver correctly orients all the corners by using 1 of 27 algorithms. After the first two layers, the solver is left with a PLL case, since both edges and corners are oriented.<br />
* '''ZZ-c:''' The last layer corners are oriented during insertion of the last F2L block. This system is similar to using [[Winter Variation]], but can be applied to ''any'' last block situation and uses many more algorithms. Conceptually, the comparison of ZZ-c with ZZ-WV is similar to the comparison of [[ZBLS]] with [[VH]].<br />
* '''[[ZZ-blah]]''' The last layer corners are ''disoriented'' during insertion of the last slot allowing the last layer to be solved using the Pi and H subsets of [[ZBLL]].<br />
* '''[[MGLS-Z]]''' During the F2L last slot, only the edge is placed. LL corner orientation and the final F2L corner are then solved in one step using [[CLS]]. Finally the solve is completed with [[PLL]].<br />
* '''[[EJLS]]''' Similar to MGLS-Z, but using less algorithms. During the F2L last slot the edge and corner are connected and placed, but the corner is not necessarily oriented. A subset of CLS is then used to orient the last slot corner along with the LL corners. [[PLL]] to finish.<br />
* '''ZZ-d:''' Just before the completion of the left-hand F2L block, the solver permutes the remaining corners to put the cube into an <R, U> group. This makes the rest of the solve [[2-gen]], which is even faster than 3-gen. Only a maximum of 2 additional moves are required to correctly permute the corners. The process is called, [[CPLS]]. However, the solver must determine the permutation of all the unsolved corners to execute this step; this is a slow process, which makes ZZ-d inappropriate for speed solving. [[2GLL]] to finish.<br />
* '''ZZ-Orbit:''' A variation of ZZ-d, the solver will permute all the corners during insertion of last F2L's pair. Recognition is not so straight forward, but much faster than that of ZZ-d. Once performed, a [[2-gen]] subset of [[ZZLL]], consisting of 71 algs, can be used for 1-look last layer. This has many similarities to [[CPLS]]/[[2GLL]], but was developed independently. Thread:[http://www.speedsolving.com/forum/showthread.php?34994-At-last-ZZ-method-has-been-COMPLETED!!!!!!!!&p=705181#post705181] Guide:[http://www.speedsolving.com/forum/showthread.php?43208-ZZ-Orbit-Guide]<br />
* '''ZZ-e:''' Similar to ZZ-d and ZZ-Orbit. After solving left block, the solver swaps remaining cormers to put the cube into an <R, U> group. The process is called, 'Semi-Permunitation'. This makes the rest of the solve [[2-gen]], which is even faster than 3-gen. However, the solver must determine the permutation of all the unsolved corners to execute this step; this is a slow process, which makes ZZ-e inappropriate for speed solving, even more than ZZ-d. [[2GLL]] to finish. Post:[http://www.speedsolving.com/forum/showthread.php?20834-ZZ-ZB-Home-Thread&p=768029#post768029]<br />
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== Pros ==<br />
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* '''Reduced Move Set''': F2L is completed using only R, U and L turns and no cube rotations are required.<br />
* '''Lookahead''': Pre-orientation of edges halves the F2L cases and makes edges easier to find and connect to blocks/corners. During a ZZ solve, the cube is typically held in the same orientation through out the solve which allows a memory map of pieces' correct locations to develop allowing fast/intuitive ability to place pieces without thinking/looking.<br />
* '''Efficiency''': With a blockbuilding-based F2L and pre-orientation of LL edges around 55 moves can be achieved without difficulty. Optimising F2L blokbuilding and adoption of more advanced LL systems such as [[ZBLL]] will reduce this move count significantly.<br />
* '''Ease of Learning''': Most of the difficulty in ZZ is confined to the EOLine stage. Intuitive blockbuilding during F2L is fairly easy to pick up and only 20 algorithms (assuming use of mirrors) are required to achieve a 2-look last layer with [[OCLL]]/[[PLL]].<br />
* '''Flexibility''': With edges pre-oriented many systems exist for completing the last layer in a ZZ solve, ranging from [[OCLL]]/[[PLL]] to [[ZBLL]]. A blockbuilding F2L also allows for the development of many short cuts and tricks as skill improves.<br />
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== Cons ==<br />
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* '''Reliance on Inspection''' - ZZ makes heavy use of inspection time, which is fine when 15 seconds is given, but in situations where no inspection is used it can be a drawback. For example, when using reduction on big cubes or within multi-solve scenarios starting a ZZ solve can be difficult.<br />
* '''Difficulty of Transition from Fridrich''' - Solving EOLine and a blockbuilding F2L is very different from Fridrich Cross and slot-based F2L. The possibility of using cross and a slot-based F2L can make it difficult to shake off old habits.<br />
* '''Difficulty of EOLine''' - EOLine is difficult to plan and execute in one step and takes a ''long time'' to master. New users should expect it to take in the order of months to achieve full EOLine inspection in 15 seconds. In the interim, breaking it down into two steps (EO + Line) can be used as a fall-back.<br />
* '''2 Extra F2L Cubies to Solve''' The first step of Fridrich (Cross) and ZZ (EOLine) are roughly comparable in terms of move-count. The remainder of F2L in ZZ requires solving of two more cubies (10 in total) than Fridrich slots (8 in total). However, freedom to fully rotate the L and R faces and the use of more efficient block building compensates for this apparent disadvantage.<br />
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== Notable users ==<br />
* [[Conrad Rider]]<br />
* [[Phil Yu]]<br />
* [[Zbigniew Zborowski]]<br />
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== See also ==<br />
* [[EOLine]]<br />
* [[Edge Orientation]]<br />
* [[ZZ-blah]]<br />
* [[ZBLL]]<br />
* [[ZBLS]]<br />
* [[VH]]<br />
* [[Winter Variation]]<br />
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== External links ==<br />
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* [http://cube.crider.co.uk ZZ Method Tutorial]<br />
* [http://www.emsee.110mb.com/Speedcubing/ZZ%20speedcubing%20system.html Michal Hordecki's description]<br />
* [http://speedcubing.com.pl/nooks_zz.htm Zbigniew Zborowski's polish ZZ page]<br />
* [http://translate.google.co.uk/translate?js=y&prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Fspeedcubing.com.pl%2Fnooks_zz.htm&sl=pl&tl=en&history_state0= Zbigniew Zborowski's polish ZZ page] (translated into Engilsh)<br />
* [http://qblog.be/2010/04/zzf2l-move-count-analysis/ ZZF2L Move Count Analysis] - by Lars Vandenbergh<br />
* [http://rubiks-cube.c0.pl/inne/eoline.htm EOLine Solver]<br />
* YouTube: [http://www.youtube.com/watch?v=a6tkUlkjnOE EOLine tutorial]<br />
* YouTube: [http://www.youtube.com/watch?v=AHJBsGwnvuQ ZZ Method Variations]<br />
* Speedsolving.com: [http://www.speedsolving.com/forum/showthread.php?t=5180 ZZ Speedcubing Method]<br />
* Speedsolving.com: [http://www.speedsolving.com/forum/showthread.php?t=8235 ZZ Cubers]<br />
* Speedsolving.com: [http://www.speedsolving.com/forum/showthread.php?t=20834 ZZ/ZB Home Thread]<br />
* Speedsolving.com: [http://www.speedsolving.com/forum/showthread.php?t=16020 ZZF2L Move Count]<br />
* Speedsolving.com: [http://www.speedsolving.com/forum/showthread.php?t=8871 Noob's Approach to Missing Link for ZZ-d]<br />
* Speedsolving.com: [http://www.speedsolving.com/forum/showthread.php?34994-At-last-ZZ-method-has-been-COMPLETED!!!!!!!!&p=705181#post705181]<br />
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[[Category:3x3x3 methods]]<br />
[[Category:3x3x3 speedsolving methods]]</div>Cyragia