4LLL

From Speedsolving.com Wiki

The 4-Look Last Layer involves completing the last layer in four steps or looks. It is an intermediate step between the beginner LBL method and learning full Fridrich. It is generally broken down into 2-look OLL (orientation of edges, followed by orientation of corners) and 2-look PLL (permutation of corners, followed by permutation of edges). Achieving 4LLL requires knowledge of 16 algorithms or 14 excluding mirrors. While progressing from 4LLL to 2LLL a speedcuber will typically learn all 21 PLLs first, to achieve a 3-look last layer. Eventually, learning the final 57 OLL cases will achieve the 2-look last layer used in full Fridrich.

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