The Note

[Rach3]

Hammerklavier, I, m. 235, beat 3 1/2. What is it?

-Rach3

[phil13]

My book has G-flat above middle C.

[TheHammer]

Henle Urtext edition notates a G sharp, and adds a comment: "Sources give b instead of #, probably an error".

Seems to me G sharp makes a tiny bit more sense (compare the same measure at beat 1 and measure 235, again beat 3 1/2, where you have a-->bflat as the g sharp-->a before..., all minor seconds, can't be sure with Beethoven though... )

Interesting question.

[jim_24601]

ABRSM complete sonatas has a G flat, with no indication in the commentary that it might be a disputed reading. The flat seems a little odd, but as TheHammer astutely points out, you can't be sure with Beethoven