Tchaikovsky's 'A Greeting to Anton Rubinstein,' TH 86, is a brief, celebratory piece likely composed as a tribute. It is characterized by its brilliant, energetic character and its rich, virtuosic piano writing.
The main technical challenge lies in executing the rapid scales and arpeggios with control and power.
A Greeting to Anton Rubinstein, TH 86 is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 10.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 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 A Greeting to Anton Rubinstein, TH 86 lasts about 3 minutes.
A Greeting to Anton Rubinstein, TH 86 is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.