The pieces of this puzzle are not built of squares, but rectangles. One of the pieces forces the puzzle to have at least two different grids of rectangles at 90 degrees to each other. The particular solution shown has actually 4 different grids of rectangles. Though there are over 1000 solutions, it is surprisingly difficult to find even one!
- red alder and black walnut wood
- 11 pieces
- 1722 solutions
- 5.5″ x 4″ (14cm x 10cm)
- difficulty level: 9 out of 10