These six songs by Georgy Catoire are set to poems by Soloviev. They display Catoire's characteristic elegance and melodic sensibility, with a rich piano part supporting the vocal line.
Achieving a refined touch and clarity in the accompaniment are key to bringing out the inherent beauty of these pieces.
6 Poems de Soloviev (Op.33) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 7.
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 6 Poems de Soloviev (Op.33) lasts about 12 minutes.
6 Poems de Soloviev (Op.33) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.