Charles Mayer's Polonaise is a bravura work that features standard 19th-century keyboard figurations. It is distinguished by its grand, heroic gestures and rhythmic drive.
At Henle 6 this is an advanced piece that assumes fluent technique and rewards mature interpretation. The main demands: fast passage work that stays light and even at tempo; octave passages that demand a relaxed wrist to avoid tension; and continuous sixteenth-note figuration that must ripple, not chatter.
Beyond that, expect rubato that must breathe naturally without losing the pulse.
Proficiency in rapid octave passages and stamina in the left hand are essential for this piece.
Comparable difficulty and character — good candidates for what to learn next.
A level or two down with the same spirit — ideal if this piece is still out of reach.
Where this piece's skills lead: slightly harder works making similar technical demands.
Concert-polonaise (Op.238) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 9.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 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 Concert-polonaise (Op.238) lasts about 5 minutes.
Concert-polonaise (Op.238) 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 Allegro di Bravura by Charles Mayer, Capriccio brillant by Charles Mayer, Allegro di bravura by Franz Liszt — see the full similar-pieces list on this page.