The Chopin B flat minor, by contrast, is a much tighter work. He says it all in about 17 minutes. It's by far his best sonata. However, Chopin's best music was not his sonatas.
The second and fourth movements are the best ones of this sonata.
I don't know how you can use the Liszt B minor sonata as an example of him showing off. Far from it. Or, was that an overall comment about his music? Whatever you think about Liszt, the B minor sonata stands as one of the monuments of piano literature.
hmoll i disagree the chopin bflat minor is outshadowed by the b minor. still an amazing work,an great sherzo but on a whole does not get close to the b minor. you say the allegro maestro does not flow in a allegro shall we say normal structure but the music that is written can only prove it doesnt have to, a heavy powerful beginning a nocturne thrown in,a gorgeous passage in d major then a somewhat uncany resemblance of a liszt transcendental study,before a repeat of that pattern in an alternate key, it is such a work of art and variations if you like.