Quadrat is the German word for square. So the challenge is clear. Build a square-based pyramid with the 10 identical metal pieces. The pentahedron must sit neatly on the 4×4 grid base which has 16 holes cut out for the ball bearings to sit in.
The wooden 4×4 grid is laser-cut. There are 10 identical pieces, each made from steel ball bearings welded together in the same shape.
Size: 70mm x 70mm x 50mm. Each ball bearing is 13mm diameter.
No solution is provided for this puzzle but I have included the address of a YouTube solution on a sticker with the puzzle. I also have a BurrTools solution file available for this puzzle.
The puzzle is made by Jean Claude Constantin.
Jean-Claude is a German puzzle inventor and maker well known for his very high quality and creative puzzles, well priced and sold at local markets. He does not export very many puzzles and we are very pleased to be able to offer a small selection of his puzzles including the Winkel puzzle.