This puzzle has a complete mathematical set of 15 pieces, but only 12 fit in the tray at a time. It can fill the tray completely, or have from 1 to 4 holes left over which can make various symmetric patterns if you’re lucky. Any of the pieces will fit in the tail for storage.
- red alder and black walnut wood
- 15 pieces
- unknown number of solutions
- 6″x 4″ (15cm x 10cm)
- difficulty level: 6 out of 10
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