The efficacy-competitiveness frontier in the Swiss system
Why tournament organizers face a tough choice between finding the best player and keeping things exciting
Chess tournaments using the Swiss system face an unavoidable trade-off: selecting the true best player requires more rounds, but this increases the risk of a meaningless final round where outcomes are already decided. A 2008 change to how the Chess Olympiad ranks winners actually made this problem worse, while using a combination of different scoring methods works better than relying on match points alone.
The Swiss system runs major chess tournaments and e-sports competitions worldwide. These findings show tournament organizers can improve how fairly they crown champions without sacrificing viewer engagement—by choosing the right scoring method and number of rounds. Getting this balance wrong means either crowning a less deserving winner or running finals that feel pointless to competitors and fans.