Primera · Sunday, 16 August 2026 · 22:30. Final score 2–2 (half-time 0–0). Before kick-off we rated it 52% over 2.5 goals — the match finished with 4, so that call landed. That rating was frozen into a version-controlled ledger before the game and has not been touched since.
Open this match in the app →| Market | Yes | No | Our call |
|---|---|---|---|
| Over 2.5 goals | 52% | 48% | Over |
| Over 3.5 goals | 30% | 70% | no pick |
| Both teams to score | 50% | 50% | Yes |
The result model puts Colo Colo at 61%, the draw at 21% and O'Higgins at 18%, from expected goals of 2.04 and 1.02.
| Market | Price | Implied | Our rating | Edge |
|---|---|---|---|---|
| Over 2.5 goals | 1.67 | 56% | 52% | -5% |
| Under 2.5 goals | 2.15 | 44% | 48% | +5% |
| Both teams to score | 1.73 | 54% | 50% | -3% |
Implied percentages have the bookmaker's margin removed, so they add to 100 and can be compared with our rating directly. Edge is simply the gap between the two. A positive edge means our model thinks the outcome is likelier than the price suggests — it is not a tip, and a high probability with a negative edge is a poor bet however safe it looks. Prices are a pre-match snapshot from a single bookmaker and move constantly.
Match odds: Colo Colo 1.50, draw 4.00, O'Higgins 6.25.
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. Colo Colo have 10 in 18 this season (4 of 9 at home), O'Higgins 9 in 18 (5 of 9 away). Those records are pulled toward the league rate with the weight of about 32 matches — enough that two or three unusual games cannot swing a rating — giving 52% and 52%.
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 52%.
Head to head. These sides have met 5 times in three years, producing over 2.5 goals in 20%. That nudges the number 10% of the way toward the head-to-head pattern — deliberately small, because fixtures change more than reputations do — landing on 49%.
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 59%, from expected goals of 2.04 for Colo Colo and 1.02 for O'Higgins. Folding in 30% of that view gives 52%.
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.
More: Colo Colo 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.