This 2-in-1 puzzle is a challenge for the true jigsaw connoisseur. We’ve stripped away all the clues that people normally use to put a puzzle together. Like our Natural Puzzles, these puzzles have no image, so assembly is guided solely by the shapes of the pieces. We further intensified the difficulty by eliminating the edge pieces and whimsies that usually serve as helpful starting points for puzzle assembly. Finally, to make things even more interesting, we included a sub-puzzle embedded within the puzzle! Roughly 70 colored pieces distributed throughout the 400-piece rectangular puzzle can be removed to form a smaller, circular puzzle.

The embedded puzzle concept would be impossible without our technology-driven approach to design. The result is an organic puzzle that is both a beautiful, one of a kind piece of art and a perplexing brainteaser. Only the bravest puzzlers dare attempt the 2-in-1 Challenge Puzzle.

• size: 15x13" rectangle and 7" circle
• material: 1/4" plywood (formaldehyde free, made in the USA)
• number of pieces: approximately 410
• packing: wood box

About Nervous System puzzles:  Jigsaw puzzles for the 21st century! Each generative puzzle is a one of a kind creation with unique pieces. The goal was to marry the artistry of traditional, hand-crafted jigsaw puzzles with the possibilities of new technologies. Custom software simulates crystal growth to create an organic interlocking pattern. Laser cuts translate this into a unique set of plywood pieces. These blank, image-less puzzles are extra challenging to assemble and also highlight the natural beauty of the wood.

To create the organic shape of the pieces, a system was designed based the simulation of dendritic solidification, a crystal growth process similar to the formation of snowflakes that occurs in supercooled solutions of certain metallic alloys. By varying the parameter space, it can produce a variety of cut styles.