Lucia Corini's 'B' is an evocative miniature that focuses on minimalist textures and subtle harmonic changes. Its simplicity forces the performer to focus on delicate touch and nuanced expression.
Developing a consistent tone quality across thin, sparse textures is the core difficulty.
Comparable difficulty and character — good candidates for what to learn next.
"B" is rated Henle level 2 of 9 — beginner repertoire, roughly ABRSM grades 2–3. In the RCM system it corresponds to about level 3.
You should be comfortable at Henle level 2 — meaning you can already play level 1–2 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of "B" lasts about 2 minutes.
"B" is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Brandelli by Lucia Corini, Blaue Aeuglein by Friedrich Burgmüller, 'Sleep! Baby, sleep!' by Alfred Humphries Pease — see the full similar-pieces list on this page.