Easier way to write conditional statement

Is there any prettier way to write this if-statement:

if not (self.is_legal(l) or self.is_legal(u) or self.is_legal(r) or self.is_legal(d))

I've tried this, but it didn't work.

if not self.is_legal(l or r or d or u)

Or maybe the first one is the prettiest?