Mozart's two Fugues, K. deest, are examples of his exploration of contrapuntal writing, showcasing his mastery of fugal techniques within a Classical framework. These pieces are intellectually rigorous and harmonically refined.
The key challenge is to articulate each melodic line with precision and balance, ensuring the contrapuntal structure is clearly audible.
2 Fugues in E-flat Major (K.deest) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 7.
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 2 Fugues in E-flat Major (K.deest) lasts about 6 minutes.
2 Fugues in E-flat Major (K.deest) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.