A puzzle design by William Stijbos of the Netherlands. It was the winner of the prestigious Himiki Puzzle competition in Japan in 1990. Features 16 wooden puzzle pieces, consisting of white and dark wood blocks, cut at various angles. Each piece represents one of the possible ways that two pieces of 2 colors cut at different angels can be joined. The objective is to assemble the pieces into a two-layer checkerboard pattern with the colors matching on both layers and with all of the pieces fitting flush to the top of the puzzles wooden container.

Dimensions: 4.75" square, 1.5" deep
Difficulty level: 5 (out of 6)
Suggested age: 15+