Primera Nacional · Sunday, 29 March 2026. Final score 1–1 (half-time 1–1). Rebuilt from the season as it stood that morning, our rating would have been 33% 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 | 33% | 67% | Under |
| Over 3.5 goals | 14% | 86% | no pick |
| Both teams to score | 41% | 59% | No |
The result model puts Deportivo Madryn at 48%, the draw at 30% and San Martin Tucuman at 22%, from expected goals of 1.25 and 0.74.
The league sets the starting point. Primera Nacional has produced over 2.5 goals in 27% of its matches, and that is where a team with no record of its own would sit.
Each side's own record. Deportivo Madryn have 2 in 5 this season (1 of 2 at home), San Martin Tucuman 1 in 5 (0 of 2 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 30% and 26%.
Last season still counts, briefly. With 5 and 5 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 30% and 25%.
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 28%.
Head to head. These sides have met 2 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 29%.
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 32%, from expected goals of 1.25 for Deportivo Madryn and 0.74 for San Martin Tucuman. Folding in 30% of that view gives 30%.
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 33%.
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 |
|---|---|---|---|---|
| Deportivo Madryn | 5 | 40% | 0% | 40% |
| San Martin Tucuman | 5 | 20% | 20% | 40% |
More: Deportivo Madryn season stats · San Martin Tucuman season stats · Primera Nacional table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.