Noctave
The piece
The two sonatas of Op. 49 date from the mid-1790s but were not published until 1805, under the title of easy sonatas. Each has only two movements. The one in G major starts with a full chord followed at once by a triplet arpeggio, then unfolds a complete sonata form in miniature: two themes, a development, a recapitulation. Nothing in it is showy, yet everything is exposed.
The right hand keeps switching subdivisions: eighth-note triplets in the opening arpeggio and in the transition, plain eighths elsewhere. Count "one-two-three" or "one-and" depending on the passage so you never blend the two. The left hand plays nearly as much as the right, at a little over four notes per second, first in triplet arpeggios and then in broken eighths under the second theme; it needs to stay supple and discreet. Most of the trills end with two grace notes leading back to the main note: fit them inside the beat without delaying the next quarter.