1x2x3 Cuboid
Solve top layer
Match top corners
Case 1
-
Case 2
R
Case 3
D R
Solve bottom layer
Match bottom corners
Case 1
-
Case 2
D
Solve middle layer
Match middle edges
Case 1
-
Case 2
R E R
Case 3
R U R U R U
Match top corners
-
R
D R
Match bottom corners
-
D
Match middle edges
-
R E R
R U R U R U