This algorithm is one of the essential OLL cases. It helps you orient the last layer more efficiently.
About This Case：
OLL20 looks like a checkered pattern and is nearly solved except for orientation. It's perfectly symmetrical.
Recognition：
A symmetric arrangement of alternated yellow pieces resembling a checkerboard.
Memory Hint：
Because it's fully symmetrical, you can identify it instantly—'the even checker' OLL.
Execution Tips：
Choose your most comfortable starting grip—symmetry means any orientation works.
OLL20 looks like a checkered pattern and is nearly solved except for orientation. It's perfectly symmetrical.
Recognition：
A symmetric arrangement of alternated yellow pieces resembling a checkerboard.
Memory Hint：
Because it's fully symmetrical, you can identify it instantly—'the even checker' OLL.
Execution Tips：
Choose your most comfortable starting grip—symmetry means any orientation works.
