I don’t know the name of this puzzle. The aim of this puzzle is to get both beads on the same loop. This puzzle looks like “African ball puzzle” but completely different. I saw this puzzle in an article written by Jerry Slocum. In this article there are a few other puzzles to make and their solutions. You can find detailed instructions for making them and the solution of this puzzle from this PDF article. I used 20mmx20mmx120mm beech. I cut the center of the block only for a different look. Holes are 10 mm. For this kind puzzles, you can find ready wooden beads in craft stores. But if you cant find, you can make wooden cubes and drill them. Two end of the rope are fixed to small beads. A small and funny to solve puzzle. Thanks to Jerry Slocum for this article.