 338, of which only the first movement was completed.The German composer Wolfgang Rihm extended his list of string quartets, first with the Twelfth Quartet (2001), the brief "Fetzen 2" (2002), and a "Quartettstudie" (2003–04), then with a revised version of String Quartet No.11 (2010) and the Thirteenth Quartet (2011), as well as another short work, "In Verbundenheit" (2014).