Sonata for piano 4-hands in D major Op. 6 [hgf.] ; 8 variations on a theme by count Waldstein in C major for piano 4-hands WoO 67 [hgf.] ; 3 marches for piano 4-hands Op. 45 [hgf.] ; 6 variations on "Ich denke dein" in D major for piano 4-hands WoO 74 [hgf.] ; Grosse Fuge, Op. 134 [hgf.] : Beethoven's own arrangement for piano 4-hands of the Grosse fuge for string quartet Op. 133 ; Piano sonata (Kurfürstensonate) in D major WoO 47 No. 3 [hgf.]