The Puzzling World of Polyhedral Dissections
By Stewart T. Coffin

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Chapter 8 - The Rhombic Dodecahedron and Its Stellations
The Four Corners Puzzle

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In the second stellation model (Fig. 101), if the 12 rhombic pyramid blocks are omitted, the result is the simple but intriguing puzzle shown in Fig. 102. Its six identical pieces are assembled in the usual way of mating two halves, which in this case are dissimilar. The assembled shape is intermediate between the first and second stellation, and it has the symmetry of a tetrahedron. It serves as the skeleton for many other more complicated puzzles to follow. It will be referred to as the Four Corners Puzzle, the name by which a four-color version of it was once produced.

Fig. 102

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