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Attack-Defense Scoring Formula

A scoring formula computes each team's rank from the number of flags captured, the number of exploits prevented (expressed as the number of own flags not captured) and the availability of their services to the checker.

The ideal scoring formula ensures a team's rank accurately reflects their effort and skill, while incentivizing competitiveness and interaction between teams throughout the CTF.

To evaluate and compare scoring formulas1 against eachother, we utilize a set of tenets derived from our own experience. Finally, we contribute our own scoring formulas which attempt to fulfill all of our criteria.

  1. Ever wanted to verify a CTF scoreboard against their formula? Great! We wrote a tool for that. ↩