On Clipped and Extended Polycubes
(by Peter F.Esser)
Take the known polycubes, slice one cube diagonally or add a sliced cube at any position and you'll get different pieces, which can be used to construct various forms and figures. I learned about this concept from
Andrew Clarke's site.
Reading and Getting Solutions
Models of Heptominoes and Heptacubes
The Wooden Pyramid