Norbert Gertsch | Akateeminen Kirjakauppa

As a highly virtuoso composition, the Bb major Sonata did not appear within a group with other sonatas, but rather held its own as Opus 22 under the title “Grand Sonata”. Beethoven offered it to his publisher as “a large solo sonata” and afterwards warned explicitly once again: “this sonata is very taxing”.
– technical and interpretational challenge for pianists