F2L 4
Free pairs: Both pieces in the U layer, a 3-move insert away.
Algorithms
R U R'reads as Extracty' f R f'y F U F'y2 L U L'reads as y2 · Lefty InsertR U2 R' U R U' R' U R U2 R'reads as Ne · Righty (reverse) · U · Ne
Free pairs: Both pieces in the U layer, a 3-move insert away.
R U R' reads as Extracty' f R f'y F U F'y2 L U L' reads as y2 · Lefty InsertR U2 R' U R U' R' U R U2 R' reads as Ne · Righty (reverse) · U · Ne