At his debut in Hamburg in 1889 , he played Tchaikovsky 's Piano Concerto No 1 in B flat minor with the composer conducting , this concert was a great success and determinant for his beginning career as a concert pianist in Western Europe .
At his debut in Hamburg in 1889 , he played Tchaikovsky 's Piano Concerto No 1 in B flat minor with the composer conducting . 
 This concert was a great success and a catalyst for his budding career as a concert pianist in Western Europe .