A：Piano concerto no.1 in B falt minor / Tschaikovsky 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 / Peter Ilyich Tchaikovsky Piano concerto No. 1 in B flat minor op. 23 / Pyotr Ilyich Tchaikovsky Piano concerto no. 1 in B flat minor, op. 23 7.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 Pinao concerto no.1 in B flat minor, op.23