Match predictor

Castres Olympique v Ospreys

Set a scoreline and see where it sits among the 5,000 simulated runs behind this fixture. Ratings as at 2026-08-24.

Your scoreline
Castres Olympique
Ospreys

The steppers skip 1, 2 and 4. Points come in fives, threes and twos with a conversion needing a try in front of it, so no match has ever finished on any of them.

Where that lands
Ospreys by 75+levelCastres Olympique by 75+

14.1% of runs finished in this bin — Castres Olympique by 3 to 7.

49 points is around the 52nd percentile of the total — the middle run scored 48.

Those two figures are separate readings and are not multiplied together. The simulation draws the gap and the amount of scoring independently, so one bar of the histogram covers many scorelines and the payload holds nothing about which of them came up with which gap.

What the model says
Castres Olympique 58.4%Ospreys 39.1%average 2722

Your pick agrees with the model on the winner. Nothing here scores that. The model’s gap is an average over both winners and yours is one afternoon, so the two are different kinds of number rather than one being right. How the model works.

Why Castres Olympique are favoured

Starting from an even match and adding what the model reads, in percentage points of win probability. Positive favours Castres Olympique, negative favours Ospreys.

Even match50.0%
Rating gap+0.2 pp

Castres Olympique 1485, Ospreys 1470 — 15 points, favouring Castres Olympique

Venue+11.9 pp

Castres Olympique are at home

Form and context-3.7 pp

Recent results, head-to-head record and rest days, as the XGBoost heads weigh them. Deliberately capped, so it can nudge the rating but never overrule it.

Castres Olympique win58.4%
The fixture

Castres Olympique and Ospreys have no fixture on the published schedule, so there is no ground, no kick-off forecast and no team sheet to put beside this. The prediction itself does not need any of them.

1 meetings Castres Olympique 0, Ospreys 1. Last 2020: Ospreys 39–15 Castres Olympique.

None of this reaches the model. Weather is not a feature, team selection is not a feature and the record is already inside both ratings, so the probability above does not move because any of it changed.

Castres Olympique against Ospreys, as a shareable card

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Rugby Tournament Predictor — unofficial, and not affiliated with any union, club or competition. About and sourcesForecasts are probabilities, not predictions of one result.

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Castres Olympique 27–22 Ospreys | RTP