Piano sonata No. 12 in A flat major op. 26 Piano sonata No. 12 in A flat major, op. 26 Piano sonata no. 12 in A-flat major, op. 26 Piano sonata No. 12 in A-flat major op. 26 Piano sonata No. 11 in B flat major op. 22 Piano sonata No. 11 in B flat major, op. 22 Piano sonata no. 11 in B-flat major, op. 22 Piano sonata no. 12 in Ab major op. 26 Piano sonata no. 2 in B flat minor, op. 36 Piano sonata no. 4 in E flat major, op. 7