Eliteserien · Friday, 18 September 2026. Final score 1–3 (half-time 1–2). Rebuilt from the season as it stood that morning, our rating would have been 57% 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 | 57% | 43% | Over |
| Over 3.5 goals | 35% | 65% | no pick |
| Both teams to score | 56% | 44% | Yes |
The result model puts Sarpsborg 08 FF at 45%, the draw at 26% and KFUM Oslo at 29%, from expected goals of 1.5 and 1.16.
The league sets the starting point. Eliteserien has produced over 2.5 goals in 62% of its matches, and that is where a team with no record of its own would sit.
Each side's own record. Sarpsborg 08 FF have 10 in 20 this season (4 of 9 at home), KFUM Oslo 11 in 20 (7 of 9 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 56% and 59%.
Last season still counts, briefly. With 20 and 20 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 60% and 57%.
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 59%.
Head to head. These sides have met 5 times in three years, producing over 2.5 goals in 60%. That nudges the number 5% of the way toward the head-to-head pattern — deliberately small, because fixtures change more than reputations do — landing on 59%.
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 50%, from expected goals of 1.5 for Sarpsborg 08 FF and 1.16 for KFUM Oslo. Folding in 30% of that view gives 57%.
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 |
|---|---|---|---|---|
| Sarpsborg 08 FF | 20 | 50% | 20% | 60% |
| KFUM Oslo | 20 | 55% | 30% | 55% |
More: Sarpsborg 08 FF season stats · KFUM Oslo season stats · Eliteserien table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.