I mean 4 hands 1 piano.
shame, but still lots of great to choose from. immediately this comes to mind
"Written in 1987 truly as a piece of "functional" music for a Soviet event, Kapustin himself said that he did not expect to ever hear it performed again - and that may very well have been the case had it not been the interest of some Japanese musicians that kept this music alive. This arrangement is Kapustin's own, and it is easy to see that both parts are much less technically challenging than the majority of Kapustin's solo-piano oeuvre. (This is certainly not the case with some of the instrumental sonatas!)
The first movement has a fully worked-out sonata form containing a number of ideas which cover Kapustin's own early big-band style (see also the Toccata op8 and the 2nd Piano Concerto op14; this style continues as late as 1989 and reaches its culmination in the 2nd Piano Sonata op54). As is usual with Kapustin, there is classical imitation at work, especially obvious at the beginning of the development."
just example audio, it is actually one pianist that recorded both parts to illustrate. but really cool pieces nonetheless!