It is subtitled "Ffifteen authentic miniatures about the strategy of chess" for quartet: violin (or flute), Saxophone contralto (or clarinet), double bass (or cello) and piano (or synthesiser). Cologne, 29 January - 6 February 1999. [3'15" in length]. Its name refers to the concept of zugzwang in chess. The work is dedicated to the chess grandmaster Lothar Schmid.