These metal bars resemble tangled music notes as the puzzle was inspired by the melodies of Johann Sebastian Bach. The pieces can be maneuvered over around and through one another a myriad of ways but only one specific sequence of movements will separate them.

Designed by Akio Yamamoto for Hanayama of Japan.

Hanayama is a Japanese toy company formed in 1972. They are best known for their series of cast zinc disassembly puzzles, which include reproductions of older designs, and new puzzles by Oskar van Deventer and Akio Yamamoto.