Concerto for Piano and Orchestra, Op. 59. Reduction for Two Pianos 

I. Moderato, con poco rubato – Molto allegro – Tempo I
II. Adagio ma non troppo e sempre con poco rubato
III. Allegro frenetico

Dedicated to Bas Verheijden

Youtube:

Bas Verheijden, piano I (solo); the composer, piano II (orchestra)

There are versions for piano and symphony orchestra and for piano and wind orchestra (Youtube: http://www.youtube.com/watch?v=pKhv7KqZgGc&list=PLFphAvDeWM1Q1-8z2_3jl1-T4NAt0gz9N).