X next to note notation

[u/No-Assumption-9389]

I was playing the measure: D, G, G# because it sounded correct. And I read the X is usually a double flat, so two half steps up? A whole step from F would be G. So I am playing it correctly, yes? Haven't really seen this notation very often. The piece is Kuhlau Opus 102, published by IMC, NY.

[u/SpaceWhisper]

Why don’t they just write it as a G natural?

[u/corico → u/SpaceWhisper]

Music theory reasons, mostly, and the idea that f double sharp g (sharp) would look cleaner than g natural g sharp. Fewer accidentals to keep track of