Soma cube. The pieces of a Soma cube (with extra coloring) The same puzzle, assembled into a cube One of the possible ways of assembling the Soma cube Soma has been discussed in detail by Martin Gardner and John Horton Conway, and the book Winning Ways for your Mathematical Plays contains a detailed analysis of the Soma cube problem.
There are 240 distinct solutions of the Soma cube puzzle, excluding rotations and reflections: these are easily generated by a simple recursive backtracking search computer program similar to that used for the eight queens puzzle. Un autre ''cube'' en bois. Pentominos. Paper Models of Polyhedra.