Piano sonata in B-flat major, K. 281 Piano Sonata in B flat major, K281 Piano sonata in B flat major, D. 960 Piano sonata in B flat major, K.333 Piano sonata in B flat major, D960 Piano sonata No. 3 in B-flat major k 281 Violin sonata in E-flat major, op. 18 1-4.Piano sonata in B flat major, D. 960 Piano sonata No. 4 in E-flat major k 282 Piano sonata in B flat major, K.281 (189f)