I agree. Op.56 is not popular. In fact, almost all the mazurkas are not popular. Though some people love those big pieces(sonatas,scherzi,etc.), I love his smaller works, such as his mazurkas,preludes, and etudes(I still like some of his big works). Also, people underestimate how difficult a mazurka or prelude can be. For me, Mazurka OP.56 no.1 and PReludes Nos.3 and 14 are as hard as Op.1 or even harder. It is a pleasure Kate Liu chose to perform the Op.56 set of mazurkas.