1. Deild · Friday, 28 August 2026. Final score 3–1 (half-time 1–0). Rebuilt from the season as it stood that morning, our rating would have been 68% 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 | 68% | 32% | Over |
| Over 3.5 goals | 43% | 57% | no pick |
| Both teams to score | 65% | 35% | Yes |
The result model puts Fylkir at 55%, the draw at 22% and Grotta at 22%, from expected goals of 2 and 1.2.
The league sets the starting point. 1. Deild has produced over 2.5 goals in 70% of its matches, and that is where a team with no record of its own would sit.
Each side's own record. Fylkir have 14 in 20 this season (8 of 10 at home), Grotta 15 in 20 (6 of 10 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 70% and 72%.
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 69% and 72%.
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 70%.
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 62%, from expected goals of 2 for Fylkir and 1.2 for Grotta. Folding in 30% of that view gives 68%.
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: Fylkir season stats · Grotta season stats · 1. Deild table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.