Adrian King wrote on Sun, Jan 11, 2009 08:37 AM UTC:
I think someone should come up with a successor to taikyoku shogi, which is
obviously too small.
Since the two largest known shogis are on boards 25 x 25 and 36 x 36, and
since there also exist shogis of size 9 x 9 and 16 x 16, I'd assume the
next in the sequence would be 49 x 49.
Someone with plenty of free time should undertake this. Preferably someone
young and healthy.