piano chord
Baug
B1D♯3F𝄪♯5
Two major thirds stacked. Symmetrical: every note can be heard as the root.
What is true of it
Baug is B, D♯ and F𝄪 — 1, 3 and #5 counted from B.
F𝄪 is a double sharp, and it has to be: every letter from B upwards is used once, so the #5 cannot be written any other way.