I'm not really concerned about backwards compatibility, but on further consideration it is probably not worth modifying the program for this. It would make the program more complicated for very little gain. It is a very unusual use case, and there will always be some games that its not going to accommodate (Alice Chess, Backlash, Viking Chess, Marseillais, etc.) And since you mention Omega, yes, it has even stranger square naming. The four extra "Wizard squares" are annotated w1, w2, w3, and w4.
I'm not really concerned about backwards compatibility, but on further consideration it is probably not worth modifying the program for this. It would make the program more complicated for very little gain. It is a very unusual use case, and there will always be some games that its not going to accommodate (Alice Chess, Backlash, Viking Chess, Marseillais, etc.) And since you mention Omega, yes, it has even stranger square naming. The four extra "Wizard squares" are annotated w1, w2, w3, and w4.