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San Carlos vs CS Cartagines Prediction - Monday, 21 September 2026

Competition: Costa Rican Primera División

Date: Monday, 21 September 2026

Kickoff Time: 09:00 (GMT+8)

Last Updated: 2026-09-21T14:03:29.166Z

AI Match Analysis Summary

Score8 AI predicts CS Cartagines Win (2) for this Costa Rican Primera División clash between San Carlos and CS Cartagines on Monday, 21 September 2026. Our ensemble machine learning model assigns a 33% probability to a home win, 27% to a draw, and 40% to an away victory. The expected goals model forecasts 1.3 xG for San Carlos and 1.5 xG for CS Cartagines, totaling 2.8 expected goals. Confidence level: Low. Analysis based on recent form, historical head-to-head data, team strength ratings, and real-time odds from major bookmakers.

Score8 AI Pre-Match Prediction

Predicted Match Result (1X2)

AI Prediction: CS Cartagines Win (2)

Confidence Level: Low

1X2 Win Probabilities

Home Win (1) - San Carlos: 33%
Draw (X): 27%
Away Win (2) - CS Cartagines: 40%

Expected Goals (xG)

San Carlos: 1.30 xG

CS Cartagines: 1.46 xG

Total Expected Goals: 2.76

Model Last Updated: 2026-09-19T22:04:41.940Z

AI Prematch Analysis — Pre-Lineup

CS Cartagines, the table's outright leader (rank 1, 18 points from 8 played, 6W 0D 2L, 18 scored) is favored over mid-table San Carlos (rank 5, 12 points from 8, 4W 0D 4L, 7 scored) with an away win probability of 40.2% against 33.2% for the home side and 26.6% for the draw. The market's main handicap sits flat at 0 despite that gap, and with an expected goals total of 2.76 and over 2.5 goals priced at 52.1%, the goals markets — particularly first-half and match totals — carry the most actionable signal in this report.

San Carlos' home advantage is being priced conservatively. Their 12 points from 4 wins and 4 losses, with only 7 goals scored across 8 matches, sits well below Cartagines' output of 18 goals in the same span, and the model's lambda split of 1.303 for the hosts against 1.456 for the visitors reflects that gap directly. Yet the handicap line still opens at 0 rather than favoring the away side outright, which is consistent with San Carlos' recent WWLWW form and the fact that Cartagines arrive off a loss that snapped a four-match winning run — recency cuts slightly against the table gap suggesting an unqualified away lean. Both defenses have conceded exactly 9 goals through 8 rounds, which is why both teams to score sits at 56.4% and the top scorelines (1-1 at 12.6%, 1-2 at 8.8%, 0-1 at 8.6%, 2-1 at 7.8%) cluster around tight, low-margin outcomes rather than a one-sided scoreline despite the attacking gap implied by the goals-for totals. With 9 bookmakers quoting and a market margin of 6.5%, pricing here is reasonably tight, and the edge distribution across all 462 quotes examined confirms that: only 89 show positive edge against 373 negative, with the best sitting at 7.2% and the worst at -15.1%. Because a positive edge on one side of any given line is mechanically offset by a larger negative edge on the other (the bookmaker's margin has to come from somewhere), the positive readings identified here — clustered in the first-half and full-match over markets, such as the 1H Over 1 line priced at 47.6% against a modelled 54.9% (7.2% edge) and the full-match Over 2 line priced at 62.5% against a modelled 69.2% (6.7% edge) — should be read as isolated market inefficiencies rather than a broad mispricing of the fixture. One caveat that shapes how much weight to put on the above: neither side's lineup had been confirmed as of this report, so any absences — particularly among Cartagines' attacking players given how concentrated their goal output has been — are not reflected in the lambda estimates or the scoreline probabilities.

Home Win: 33.2%, Draw: 26.6%, Away Win: 40.2%

Expected Goals: 2.8 (Home xG: 1.30, Away xG: 1.46)

Most Likely Score: 1-1

Over 2.5: 52.1%, BTTS: 56.5%

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