TACTIX Impact

Reading the Leaderboard

Pick a league to see its top players ranked by Impact per match — the average of every match Impact the player has recorded that season. Apps is appearances; G and A are goals and assists, shown for context because they’re the heaviest single weights, but the ranking rewards the full body of work: a defender who tackles, blocks and intercepts all season can out-rank a streaky forward.

Boards are league matches only. A player’s own hub adds up every competition they played that season, so their appearance count and Impact there can be higher — both figures come from the same published formula over different sets of matches.

Each match action is worth a fixed number of points. A player’s match Impact is the sum; their season figure is the average per match. The formula is linear and fully reproducible.

• Attacking — goal +3.5, assist +2.5, shot on target +0.4, key pass +0.35, successful dribble +0.35.
• Defending — tackle +0.5, interception +0.5, block +0.5, duel won +0.2, penalty saved +5.0.
• Goalkeeping — each save +0.4, clean sheet +3.0 (goalkeepers only — a team clean sheet isn’t credited to outfielders, whose defending already counts via tackles, blocks and interceptions).
• On the ball — each accurate pass +0.01; penalty won +1.2, scored +1.0.
• Costly actions — yellow −1.0, red −3.0, foul −0.15, penalty missed −1.5, penalty conceded −1.2.

The full weight set is also available at /api/impact/weights, and the league and season tree at /api/impact/meta. Built from official match data; not a measure of betting value (see Today’s Value for that).

Why Publish the Weights?

Most player ratings are proprietary: a number appears next to a name and you’re asked to trust it. Impact takes the opposite bet — the formula is linear, every weight is public, and anyone can recompute any score from the same official match data. That makes Impact arguable, which is the point: if you think a tackle is worth more than +0.5, you can say exactly where you disagree and rebuild the table your way from the published weights.

It’s the same philosophy as the prediction side of TACTIX, where every forecast is graded publicly on the model scoreboard: claims you can check beat claims you have to trust.

What Impact Can’t See

Impact is built from on-ball event data, so off-ball value — pressing shape, decoy runs, defensive organisation — is invisible to it. Linear weights also treat every action of a type identically: a 90th-minute winner scores the same +3.5 as a 5–0 consolation. And goalkeepers and outfielders accumulate points differently by role, which is why the leaderboard is best read within a position group. These are deliberate trade-offs for a rating that stays fully transparent and reproducible; treat it as a well-lit lens, not a verdict.