From their website:
The Twelve Puzzle is a sliding tile puzzle, inspired by the classic 15 puzzle. This puzzle has three separate challenges. First, slide the tiles so the white pieces form exactly seven complete circles. Next, slide the tiles so the blue pieces form seven complete 2x2 squares. Finally, find the arrangement of tiles so the green pieces form an unbroken circuit. You can ignore the other colors as you work on each challenge. The circle and square challenges have unique solutions, while the circuit challenge has two possible solutions.
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I assembled this puzzle myself.Stored in a pet- and smoke-free environment.
Shipping from Switzerland to anywhere in the world.
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