Basically when two classical pianist
s get together in a room/concert hall and take turns playing the piano. One may play for example a Chopin
Etude and then the other competitor may play a Liszt etude in rebuttal. OR one may play a Mozart
Sonata and the other may play a Beethoven Sonata in response.The winner of this "duel" is determined by the unanimous vote of the audience, which would loosely indicate which pianist has the better technical ability, and musicianship.