2x2 EG1 S 4 algorithm

Solve the remaining 2x2 corners when the completed first face has an adjacent swap in its layer.

EG1 S 4 belongs to the S group in EG 1.

Recognize this starting position

In the inverse-derived training position, the upper-face color points upward at these corner positions: UFL. Reading each side’s upper corner stickers left to right when facing that side gives F: L U; R: F U; B: R U; L: L B. The letters identify colors by their reference faces.

Execute the algorithm

U F' R' F R2 U R' U' F R' F' R U

The opening is U F' R'; the final segment is F' R U. This version contains 13 face, wide, or slice turns and no whole-puzzle rotations.