Match predictor

Bayonne vs Black Lion

What the model says about this fixture, at either ground and at a neutral one, with the record behind it. Ratings as at 2026-08-24.

Who wins, and where it is played
Bayonne at home35-18 average
Bayonne 76.9%draw 2.5%20.6% Black Lion
Black Lion at home23-30 average
Black Lion 28.9%draw 2.5%68.6% Bayonne
Neutral ground32-21 average
Bayonne 73.1%draw 2.5%24.4% Black Lion

Each figure is 5,000 simulations of this fixture. The score is where those runs are centred, not a likely scoreline — a rugby result is spread far too widely for any single one to be likely.

How the runs finished

Winning margin across 5,000 simulations of this fixture. Bars right of the centre are Bayonne wins; the faded bars at each end hold everything beyond 75 points.

Margin percentiles

p10 Black Lion +2p25 Bayonne +1p50 Bayonne +11p75 Bayonne +24p90 Bayonne +38

Eight runs in ten finished between 2 Black Lion and 38 Bayonne, with the middle run at 11 Bayonne.

Those are gaps rather than scorelines. How much scoring the match produces is drawn separately — between 32 and 75 points in eight runs out of ten — so one bar covers many scores. The middle run above is 26-15 on a tight afternoon and 37-26 on an open one.

Why Bayonne are favoured

Starting from an even match and adding what the model reads, in percentage points of win probability. Positive favours Bayonne, negative favours Black Lion.

Even match50.0%
Rating gap+27.1 pp

Bayonne 1413, Black Lion 986 — 428 points, favouring Bayonne

Venue+5.8 pp

Bayonne are at home

Form and context-6.0 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.

Bayonne win76.9%

Head to head

Bayonne100Black Lion

1 meeting, 2025 to 2025 · Bayonne by 25.0 on average

DateMatchCompetitionVenue
2025-01-11Black Lion 1641 BayonneEuropean Challenge CupMikheil Meskhi Stadium

None of this feeds the forecast: both ratings already contain these results.

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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