J2 League · Sunday, 11 October 2026. Final score 0–1 (half-time 0–1). Before kick-off we rated it 52% under 2.5 goals — the match finished with 1, 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 | 49% | 51% | Under |
| Over 3.5 goals | 28% | 72% | no pick |
| Both teams to score | 52% | 48% | no pick |
The result model puts Montedio Yamagata at 28%, the draw at 27% and Vegalta Sendai at 45%, from expected goals of 1.1 and 1.48.
The league sets the starting point. J2 League 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. Montedio Yamagata have 3 in 9 this season (1 of 5 at home), Vegalta Sendai 4 in 9 (2 of 5 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 43% and 46%.
Last season still counts, briefly. With 9 and 9 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 55% 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 48%.
Head to head. These sides have met 4 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 48%.
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 48%, from expected goals of 1.1 for Montedio Yamagata and 1.48 for Vegalta Sendai. Folding in 30% of that view gives 48%.
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 49%.
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 |
|---|---|---|---|---|
| Montedio Yamagata | 9 | 33% | 0% | 22% |
| Vegalta Sendai | 9 | 44% | 33% | 56% |
More: Montedio Yamagata season stats · Vegalta Sendai season stats · J2 League table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.