non plus ultra

Literally \"nothing further beyond\" — a phrase meaning the pinnacle or utmost limit. Woelfl applied it as the subtitle to his Op. 41 piano sonata, signalling its extreme technical demands. The gesture prompted Dussek to respond with his own sonata titled \"Plus Ultra.\"

Approach Op. 41 with the understanding that Woelfl intended it as a showpiece of virtuosic limits. Extended hand positions, wide leaps, and brilliant passagework require careful technical preparation before tempo is attempted.