Solino is absolutely correct. Here's a complete run-down of the music performed (all Chopin of course)--
Act 1: Soheil (on stage)--1 page excerpt of 3rd sonata, 3rd movement
Koji (in pit)--Piano concerto #2, Op. 21 (complete)
Act 2: Soheil (on stage)--Valse brilliante, Op. 34 #1, Ecossaise Op. 72 #3, Waltz Op. 34 # (excerpt)
Koji (in pit)--3rd sonata, 3rd movement (complete), Prelude Op. 28 #2, #17, #15, 3rd sonata, 3rd movement (excerpt), Prelude Op. 28 #2 and 24
Act 3: Soheil (in pit)--Grande Fantasie, Op. 13 (excerpt), Ballade Op. 23, Andante Spianato and Grande Polonaise, Op. 22, Piano Concerto #1, 2nd movement, 3rd sonata, 3rd movement (excerpt)