2x2 Cube

Layer by layer: insert the first-layer corners, orient the top with Sune, then swap the top corners. 6 cases.

Solve one face, orient the opposite face (OLL), then permute both layers (PBL). 12 cases.

Solve the first layer, then the whole last layer in one algorithm. 42 cases.

CLL for a first layer with an adjacent corner swap: solves the whole cube in one algorithm. 40 cases.

CLL for a first layer with a diagonal corner swap: solves the whole cube in one algorithm. 40 cases.