Primera · Monday, 27 July 2026. Final score 2–0 (half-time 1–0). Rebuilt from the season as it stood that morning, our rating would have been 53% for over 2.5 goals. This match is older than our frozen ratings ledger, which keeps 30 days, so that figure is a reconstruction from pre-match data rather than a number we published at the time — a distinction worth making, because only the frozen ones prove what we actually said beforehand.
Open this match in the app →| Market | Yes | No | Our call |
|---|---|---|---|
| Over 2.5 goals | 53% | 47% | Over |
| Over 3.5 goals | 31% | 69% | no pick |
| Both teams to score | 54% | 46% | Yes |
The result model puts Concepción at 31%, the draw at 24% and O'Higgins at 45%, from expected goals of 1.41 and 1.75.
The league sets the starting point. Primera has produced over 2.5 goals in 52% of its matches, and that is where a team with no record of its own would sit.
Each side's own record. Concepción have 6 in 15 this season (2 of 7 at home), O'Higgins 7 in 15 (4 of 7 away). Those records are pulled toward the league rate with the weight of about 24 matches — enough that two or three unusual games cannot swing a rating — giving 47% and 50%.
Last season still counts, briefly. With 15 and 15 games played this season, last season's rates are still blended in and fade out entirely by game 40 — the point at which our testing showed they stop adding accuracy. A single season is part luck, so each club's record is first pulled toward the league average by 34 games' weight. That moves the two figures to 47% and 48%.
The mix. Weighted 40% home side, 40% away side and 20% league — the split that beat every alternative across 30,582 matches of testing — that gives 48%.
Goal expectation. Separately a Poisson model built from attack and defence strength — using real expected-goals data where the league has it — puts this match at 61%, from expected goals of 1.41 for Concepción and 1.75 for O'Higgins. Folding in 30% of that view gives 52%.
Calibration. Tested against 97,729 past matches, our ratings below 55% have run consistently too pessimistic — a figure in the high 30s, for instance, has come in about four points higher. So ratings in that range are lifted part-way back, giving 53%.
This breakdown is generated from the same inputs the rating uses, so it cannot describe a calculation we did not perform. The full model is set out in the methodology.
| Team | Games | O2.5 | O3.5 | BTTS |
|---|---|---|---|---|
| Concepción | 15 | 40% | 13% | 40% |
| O'Higgins | 15 | 47% | 27% | 47% |
More: Concepción season stats · O'Higgins season stats · Primera table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.