I think it's not possible.
A system we could create would be to post each played games and an admin count the victory numbers...
One more time, it's almost impossible to do cuz it will require lot of time and it will bring many problems and disagreements :/
So the only feasible solution would be to make tournaments (periodically or not), where players register.
Fair conditions, meeting at set time, posted games, moderated results. Different kinds of tournaments on different maps...
i think it's the most fair and realizable system.
We're off subject
So let's continue this discussion, HERE
The best defence is attack!