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| Designer | : | Unknown |
| Craftsman | : | Tom Lensch (1st) Philippe Dubois (2nd) |
| Category | : | Interlocking |
| Material | : | Mahogany |
| Pieces | : | 15 |
| This example shows how the Diagonal Burr can be extended when it contains a key piece. Not a terribly difficult puzzle, but very nice looking. Philippe Dubois called it Composition 456. The "456" represents the number of pieces going in each direction. | ||