Key takeaways
- MMA uses the ten-point must system: the round winner gets ten, the other fighter nine or fewer.
- Effective striking and grappling together are the primary criterion, effective aggression is secondary, and cage control and pace come after that.
- Judges are asked to score each round on its own merits rather than weigh the cumulative impact of a fight.
- A 10-8 is encouraged where one fighter lands a substantial amount of impactful strikes or spends significant time in dominant grappling positions.
- Disagreement is structural, not merely incompetence: three people scoring independently from three physical positions will sometimes see three different rounds.
Three judges watch the same round and hand in three different scores. It is the most reliably infuriating thing about mixed martial arts, and most of it is explained not by incompetence but by the structure of the scoring system itself.
The system is the ten-point must system: the fighter who wins the round must receive ten points, and the other fighter receives nine or fewer. An even round is ten-ten. Penalty points assessed by the referee for fouls — usually one per offence, occasionally two — are deducted from each judge's score for that round.
The criteria, in the order judges are told to apply them
The Association of Boxing Commissions has published guidance on what judges in the United States should weigh, and it is a hierarchy rather than a checklist.
1. Effective striking and grappling. The primary criterion, and it deliberately treats the two together. It covers legal strikes that inflict more damage on one fighter in that round, and it explicitly includes successful takedowns, reversals and submission attempts. Judges are asked to take each round on its own merits rather than consider the cumulative impact of strikes across the fight.
2. Effective aggression. Secondary. This is about which fighter made more of an effort to finish the fight in that round. Note the word effective: walking forward while being hit is aggression without effect, and is not what the criterion is asking about.
3. Cage generalship and dictating the pace. Last. Where the fight took place, who imposed it, and who set the tempo.
The hierarchy is the whole point. These are not three things to be weighed against one another and averaged. Criterion two is only supposed to matter when criterion one does not separate the fighters, and criterion three only when the first two do not.
What a 10-8 round is supposed to be
The guidance here is more expansive than many viewers assume. Judges are encouraged to score rounds 10-8 where one fighter has landed a substantial amount of impactful strikes, or spent large amounts of time in dominant grappling positions — with the explicit reasoning that rounds where a fighter controls much of the action should be properly scored to reward that fighter.
Two common misconceptions follow from that:
- A knockdown is not automatically a 10-8. A fighter can be dropped and recover to win the remainder of the round.
- A 10-8 does not require a knockdown. Five minutes of dominant grappling with sustained offence is squarely within the guidance.
Scores below eight exist in principle — some jurisdictions set a floor, with New Jersey's being seven — but they are vanishingly rare in practice.
How three cards become one result
At the end of the fight each judge submits a total for each fighter, and the combination decides the outcome:
| Result | What the three cards said |
|---|---|
| Unanimous decision | All three judges have the same winner |
| Majority decision | Two judges have the same winner, the third has a draw |
| Split decision | Two judges have one winner, the third has the other |
| Unanimous draw | All three score it a draw |
| Majority draw | Two score a draw, the third has a winner |
| Split draw | One scores a draw, the other two have different winners |
The existence of six distinct outcomes for a three-card system is a reasonable clue that disagreement is expected rather than aberrant.
Why disagreement is structural
Four reasons, none of which require a judge to be bad at their job.
Rounds are scored independently. A judge is not permitted to reason "he won the first two, so I'll give him the benefit of the doubt here." Each round starts from zero. That is a deliberate design choice and it guarantees that a fight which is close throughout will produce cards that diverge.
The primary criterion bundles two unlike things. Damage from strikes and success in grappling sit in the same category, and there is no published exchange rate between them. Two judges applying the guidance correctly can legitimately weigh a round of control against a round of clean striking differently.
Sightlines differ. Three judges sit at three points around the cage. A submission attempt that looks tight from one angle looks loose from another; a strike that appears to land flush from one seat is visibly blocked from the next.
Damage is judged in real time, without replay. A judge scores what they saw, at full speed, once.
This is where mixed martial arts differs most from boxing, which uses the same ten-point must framework but a narrower set of things to weigh. The comparison is set out in boxing scoring, and the contrast is instructive: a narrower criteria set produces less disagreement and a less complete description of what happened.
Scoring a decision round in a simulator
40-0 MMA & Boxing Fight Draft runs two separate simulators. Mixed martial arts bouts resolve by knockout, technical knockout, submission or decision. Boxing adds draws and judges' scorecards.
For the mixed martial arts decision path, the model scores each round against a weighting that mirrors the hierarchy above: damage-weighted offence first, finishing attempts second, control and pace last. A round that one fighter dominates on the primary criterion is scored 10-8; a close round is 10-9; and evens are possible but uncommon, as in the sport.
The part worth explaining is what we did on top of that, because it is counter-intuitive for a simulation: we added deliberate divergence between the three cards.
The straightforward implementation is one scoring function applied three times, which produces a unanimous decision on every fight that goes the distance. We shipped that first and it felt wrong immediately — not unfair, just flat. The sport's decisions are contested, and a simulator that never produces a split decision is quietly claiming that scoring is objective.
So each simulated judge applies the same hierarchy with a small independent variation in how it trades damage against control, within a bounded range. Clear rounds come back unanimous, because the variation is not large enough to overturn a round that was not close. Genuinely close rounds sometimes split.
The honest caveat: this is a representation of disagreement, not a model of its causes. Our simulated judges do not have seats, sightlines or fatigue. They are three slightly different weightings, which reproduces the distribution of outcomes without reproducing the mechanism that generates it in reality. If you want to know why a particular real scorecard looked the way it did, a simulator cannot tell you.
How records accumulate from all these decision paths is covered in how boxing records are written.
The game's fighter pools are built from real fighters' careers, with ratings and records that are the game's own estimates. It is not affiliated with, endorsed by or licensed by any promotion, sanctioning body, event or athlete, and nothing it produces describes or predicts a real bout. The studio's other titles are listed under sports GM.
Good to know
Frequently asked questions
How are MMA rounds scored?
What are the criteria, in order?
What makes a round 10-8?
What is the difference between a split and a majority decision?
Why do judges disagree so often?
Sources
- Mixed martial arts rules (opens in a new tab)Wikipedia — accessed
- Professional boxing (opens in a new tab)Wikipedia — accessed
League, team and athlete names appear here only to identify the rules, records and history being discussed. Reign Creative LLC's sports games are not affiliated with, endorsed by or licensed by any league, team, players' association or athlete, and all names and marks belong to their owners.
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