Primera Nacional · Sunday, 19 April 2026. Final score 0–0 (half-time 0–0). 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 | 10% | 90% | no pick |
| Both teams to score | 39% | 61% | No |
The result model puts CA Estudiantes at 52%, the draw at 30% and Chaco For Ever at 18%, from expected goals of 1.27 and 0.63.
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. CA Estudiantes have 2 in 8 this season (0 of 3 at home), Chaco For Ever 3 in 8 (1 of 4 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 27% and 30%.
Last season still counts, briefly. With 8 and 8 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 25% and 28%.
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 27%.
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 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 30%, from expected goals of 1.27 for CA Estudiantes and 0.63 for Chaco For Ever. Folding in 30% of that view gives 29%.
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 |
|---|---|---|---|---|
| CA Estudiantes | 8 | 25% | 0% | 0% |
| Chaco For Ever | 8 | 38% | 25% | 50% |
More: CA Estudiantes season stats · Chaco For Ever season stats · Primera Nacional table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.