Editing Sonata form (section)

===Partial or varied recapitulations===
In some pieces in sonata form, in the recapitulation, the first subject group is omitted, leaving only the second subject group, like the second movement of [[Haydn]]'s Sonata Hob. XVI/35, as well as the opening movements of Chopin's [[Piano Sonata No. 2 (Chopin)|Piano Sonata No. 2]] and [[Piano Sonata No. 3 (Chopin)|No. 3]]. It is also possible for the first subject group to be slightly different in comparison of the exposition, like the fourth movement of [[Antonín Dvořák|Dvorak]]'s [[Symphony No. 9 (Dvorak)|Symphony No. 9]]. Another example occurs in the finale of Mozart's string quartet [[K. 387]], where the opening of the first subject group is cut, and in the [[String Quintet No. 3 (Mozart)|quintet]] K. 515, where a later portion of the first subject group is cut. On the other hand, it is also possible for the subject groups to be reversed in order, like the fourth movement of [[Bruckner]]'s [[Symphony No. 7 (Bruckner)|Symphony No. 7]], or the first movement of Mozart's [[Piano Sonata No. 9 (Mozart)|piano sonata in D major, K. 311]]. The second subject group's melody can be different compared to the exposition, like [[Haydn]]'s [[Symphony No. 44 (Haydn)|Symphony No. 44]]. Such melodic adjustment is common in minor-key sonata forms, when the mode of the second subject needs to be changed, for example in the opening movement of Mozart's wind serenade [[K. 388]]. In rare cases, the second subject theme can be omitted, as in the finale of Tchaikovsky's [[Violin Concerto (Tchaikovsky)|Violin Concerto]] in D major.