Sorry for the late response. I couldn't quite figure out how to post wips regarding my chess picture which I had uploaded earlier.
So I just send some screenshots to you. These show some meshes from different angles.
For modelling I mostly used splines in connection with Loft and Lathe Nurbs and I adjusted some poses using deformers. Very simple.
The 3 "haircut lines" in the knight's (horses) neck are done by a Boolean operation.
The background is just a blurred picture.