Urvalsdeild · Sunday, 20 September 2026. Final score 1–1 (half-time 0–0). Before kick-off we rated it 64% over 2.5 goals — the match finished with 2, so that call missed. 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 | 63% | 37% | Over |
| Over 3.5 goals | 41% | 59% | no pick |
| Both teams to score | 65% | 35% | Yes |
The result model puts IBV Vestmannaeyjar at 34%, the draw at 25% and Valur Reykjavik at 42%, from expected goals of 1.44 and 1.63.
The league sets the starting point. Urvalsdeild has produced over 2.5 goals in 63% of its matches, and that is where a team with no record of its own would sit.
Each side's own record. IBV Vestmannaeyjar have 14 in 23 this season (7 of 11 at home), Valur Reykjavik 17 in 23 (6 of 11 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 62% and 68%.
Last season still counts, briefly. With 23 and 23 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 59% and 68%.
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 63%.
Head to head. These sides have met 4 times in three years, producing over 2.5 goals in 75%. 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 64%.
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 1.44 for IBV Vestmannaeyjar and 1.63 for Valur Reykjavik. Folding in 30% of that view gives 63%.
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 |
|---|---|---|---|---|
| IBV Vestmannaeyjar | 23 | 61% | 43% | 70% |
| Valur Reykjavik | 23 | 74% | 57% | 74% |
More: IBV Vestmannaeyjar season stats · Valur Reykjavik season stats · Urvalsdeild table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.