The Puzzling World of Polyhedral Dissections
By Stewart T. Coffin

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Chapter 9 - Polyhedral Puzzles with Dissimilar Pieces
The Augmented Four Corners Puzzle

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The single puzzle piece shown in Fig. 114 consists of a six-sided center block to which have been attached two right-handed prism blocks. Six such identical pieces assemble into an interlocking configuration as shown, with three gaps in each of the four corners. These gaps are filled with 12 rhombic pyramid blocks. Each block can be attached to either of two adjacent pieces. There is one and only one way of attaching them whereby six dissimilar nonsymmetrical puzzle pieces are created, as shown. They assemble one way only, with only one sliding axis, to make a very satisfactory puzzle. The appearance of the puzzle is enhanced by using a contrasting wood for the added blocks.

Fig. 114

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