Piano Concerto 1 in B-flat Minor Op. 23 by Peter Ilyitch Tchaikovsky. Sheet music and recordings of thousands of piano pieces by Peter Ilyitch Tchaikovsky and many other famous composers to view in your digital device, print out or listen to. Piano Concerto 1 in B-flat Minor - Op. 23 is a piece by the late romantic composer Peter Ilyitch Tchaikovsky. The composition was first published in 1875 and is included in Miscellaneous pieces by Tchaikovsky.