Pinao concerto no.1 in B flat minor, op.23 piano concerto no.1 in b flat minor,op.23 Piano concerto no.1 in B flat minor, op.23 Piano concerto no. 1 in B flat minor, op. 23 Piano concerto No.1 in B flat minor op.23 Piano concerto No.1 in B flat minor,op.23 Piano concerto No. 1 in B flat minor, op. 23 Piano Concerto No.1 in B flat minor,op.23 Piano concerto No.1 in B flat minor Op.23 concerto no.1 in B flat minor, op.23