Piano Concerto No.1 in B flat minor (2 & 3 movement) Piano Concerto No.1 in B flat minor (first movement) Piano concerto no.1 in B flat minor op.23(降B小调第一钢琴协奏曲) Piano concerto no.1 in B flat minor, op.23 Piano concerto no.1 in b flat minor,op.23 (降B小调第一钢琴协奏曲) 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