Promotion League · Saturday, 8 August 2026. Final score 1–2 (half-time 1–1). Before kick-off we rated it 67% over 2.5 goals — the match finished with 3, 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 | 67% | 33% | Over |
| Over 3.5 goals | 50% | 50% | Over |
| Both teams to score | 69% | 31% | Yes |
The result model puts Basel II at 51%, the draw at 21% and Grand-Saconnex at 28%, from expected goals of 2.12 and 1.54.
The league sets the starting point. Promotion League has produced over 2.5 goals in 69% of its matches, and that is where a team with no record of its own would sit.
Each side's own record. Basel II have 1 in 1 this season, Grand-Saconnex 1 in 1. Those records are pulled toward the league rate with the weight of about 32 matches — enough that two or three unusual games cannot swing a rating — giving 70% and 70%.
Last season still counts, briefly. With 1 and 1 games played this season, last season's rates are still blended in and fade out entirely by game 14 — the point at which our testing showed they stop adding accuracy. That moves the two figures to 65% and 73%.
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 69%.
Head to head. These sides have met 4 times in three years, producing over 2.5 goals in 25%. That nudges the number 10% of the way toward the head-to-head pattern — deliberately small, because fixtures change more than reputations do — landing on 65%.
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 71%, from expected goals of 2.12 for Basel II and 1.54 for Grand-Saconnex. Folding in 30% of that view gives 67%.
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 |
|---|---|---|---|---|
| Basel II | 1 | 100% | 100% | 100% |
| Grand-Saconnex | 1 | 100% | 100% | 0% |
More: Basel II season stats · Grand-Saconnex season stats · Promotion League table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.