History
Basic layer-by-layer methods were among the first to arise during the early 1980s cube craze. David Singmaster published a layer-based solution in 1980 which proposed the use of a cross.
The major innovation of CFOP over beginner methods is its use of F2L, which solves the first two layers simultaneously. This was in fact not invented by Jessica Fridrich; according to Singmaster's report on the 1981 world championship, Fridrich was at the time using a basic layer method, while Dutch competitor Guus Razoux Schultz had a primitive F2L system.
Fridrich switched to F2L later in 1982. Her main contribution to the method was developing the OLL and PLL algorithms, which together allowed any last layer position to be solved with two algorithms and was significantly faster than previous last layer systems.
Read more about this topic: Fridrich Method
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