Larry Smith wrote on Tue, Jun 21, 2005 01:42 AM UTC:
This would be a great question to ask the FIDE: Why is checkmate the only
win condition in Chess and all else are draws?
I'm sure that there was a great debate about this during the adoption of
the Mad Queen variant as their advocated game. So there ought be a large
amount of data to back up these decisions.
(Or the decision could have been a form of simplication, one win condition
only and all else resulting in un-decided games.)