Early Sonatas (K. 1-6):
- Sonata in C major, K. 1
- Sonata in F major, K. 2
- Sonata in B-flat major, K. 3
- Sonata in E-flat major, K. 4
- Sonata in G major, K. 5
- Sonata in A minor, K. 6
Intermediate Sonatas (K. 7-20):
- Sonata in C major, K. 7
- Sonata in F major, K. 10
- Sonata in C minor, K. 14
- Sonata in F major, K. 15
- Sonata in B-flat major, K. 18
- Sonata in F major, K. 20
Late Sonatas (K. 279-333):
- Sonata in C major, K. 309
- Sonata in A minor, K. 310
- Sonata in C minor, K. 311
- Sonata in F major, K. 332
- Sonata in A major, K. 331
- Sonata in B-flat major, K. 333
Other Notable Sonatas:
- Sonata in E-flat major, K. 282
- Sonata in C major, K. 545
- Sonata in A major, K. 521
- Sonata in D major, K. 576
It's important to note that this order is subjective and can vary based on individual interpretations and skill levels. Difficulty can also depend on specific movements within a sonata.