First publishing was in Dutch by Hans Dockhorn and Anneke Treep in 1981. The last layer steps OLL (orient last layer) and PLL (position last layer) involve first orienting the last layer pieces, then permuting them into their correct positions. In the simple solution, the pieces are positioned first, and then oriented. The first official publication of CFOP was done by Anneke Treep and Kurt Dockhorn in 1981 in the Netherlands, based on the F2L-pairing idea of the Dutch professor René Schoof.Īnother difference between the CFOP method over Nourse's simple solution is that it orients the Last Layer first, and then positions the pieces. Jessica Fridrich, also competing at this championship, was then using a LBL method. Guus Razoux Schultz was using this method as part of his CFCE method during the 1982 World Rubik's Cube Championship, but he did not invent this F2L method. The major innovation of CFOP over the simpler LBL methods is its use of F2L, which solves the first two layers simultaneously by solving top-corners and vertical edges together after the Cross is established. David Singmaster published a faster layer-based solution in 1980. There are 78 algorithms in total to learn for OLL and PLL but there are other algorithm sets like ZBLL and COLL that can be learned as an extension to CFOP to improve solving efficiency.īasic layer-by-layer methods were among the first to arise during the early 1980s craze, such as James Nourse's The Simple Solution to Rubik's Cube which proposed the use of a cross, and worked its way down. The method works by first solving a cross typically on the bottom, continuing to solve the first two layers together (F2L), orienting the last layer (OLL), and finally permuting the last layer (PLL). Jessica Fridrich, a Czech speedcuber and the namesake of the method, is generally credited for popularizing it by publishing it online in 1997. This method was first developed in the early 1980s, combining innovations by a number of speed cubers. The CFOP method (Cross – F2L – OLL – PLL), also known as the Fridrich method, is one of the most commonly used methods in speedsolving a 3×3×3 Rubik's Cube and is possibly the fastest method. For other uses, see OLL (disambiguation).
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