simple gaming ladder system

I love how simple PunBB is but my site needs a special feature that I have not found... It would be great if someone could make a simple gaming ladder feature that could be posted with every new topic if the topic user chooses to... Similar to a poll but this is a complete ladder....

"I want my users to create game ladders with how ever many people they want... then only the topic poster could update the ladder.. or each person could update only on their name and their opponents name so they advance if its equal... And I want this incorporated with posting a new topic"