K League 1 · Wednesday, 13 May 2026. Final score 2–1 (half-time 2–0). Rebuilt from the season as it stood that morning, our rating would have been 44% 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 | 44% | 56% | Under |
| Over 3.5 goals | 23% | 77% | no pick |
| Both teams to score | 51% | 49% | Yes |
The result model puts Ulsan Hyundai FC at 36%, the draw at 30% and Jeju United FC at 34%, from expected goals of 1.09 and 1.07.
The league sets the starting point. K League 1 has produced over 2.5 goals in 46% of its matches, and that is where a team with no record of its own would sit.
Each side's own record. Ulsan Hyundai FC have 7 in 13 this season (4 of 7 at home), Jeju United FC 3 in 13 (1 of 6 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 49% and 38%.
Last season still counts, briefly. With 13 and 13 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 44% and 42%.
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 43%.
Head to head. These sides have met 10 times in three years, producing over 2.5 goals in 50%. 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 44%.
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 37%, from expected goals of 1.09 for Ulsan Hyundai FC and 1.07 for Jeju United FC. Folding in 30% of that view gives 42%.
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 44%.
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 |
|---|---|---|---|---|
| Ulsan Hyundai FC | 13 | 54% | 31% | 62% |
| Jeju United FC | 13 | 23% | 0% | 38% |
More: Ulsan Hyundai FC season stats · Jeju United FC season stats · K League 1 table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.