Predictions / Football / Brazil. Copa Rio / Sampaio Corrêa RJ vs São Gonçalo EC RJ

Prediction Audit: Sampaio Corrêa RJ vs São Gonçalo EC RJ Prediction, Odds & AI Betting Tips

Sampaio Corrêa RJ Sampaio Corrêa RJ
Aug 12, 2026 - 17:45
1 1.32
0 1.28
xG Accuracy: 64%
São Gonçalo EC RJ São Gonçalo EC RJ

AI correctly predicted the Sampaio Corrêa RJ win.

The match finished 1–0, validating the model's directional assessment.

Tracked markets vs full-time result

Prediction grade B-

Each row compares the pre-match model lean to the full-time result.

  • Market Prediction Result Outcome
  • Over / Under 2.5 Under 2.5 Under 2.5 (1 goals) ✔ Correct
  • Both Teams To Score BTTS Yes No ✖ Incorrect
  • 1X2 Sampaio Corrêa RJ Sampaio Corrêa RJ ✔ Correct
  • Correct Score Insights 1-1, 1-0, 0-1, 2-1, 1-2 1-0 ✔ Correct

Model vs Closing Market

Strong Disagreement

The model rates São Gonçalo EC RJ considerably stronger than the closing betting market.

Largest probability gap: São Gonçalo EC RJ +17.1 pp

Outcome Model Closing Market Difference Signal
Sampaio Corrêa RJ 36.1% 52.9% -16.8 pp Market Higher
Draw 29.6% 30.0% -0.3 pp Aligned
São Gonçalo EC RJ 34.2% 17.1% +17.1 pp Model Edge

The statistical model estimates São Gonçalo EC RJ's win probability at 34.2%, compared with the closing market's implied probability of 17.1%, a difference of 17.1 percentage points. This highlights a substantial disagreement between the model's assessment and the market consensus, rather than indicating which view is ultimately correct.

Model probabilities are generated from the statistical xG model using a Poisson distribution. Closing market probabilities are derived from consensus closing 1X2 odds after margin removal. Values represent implied probabilities rather than betting recommendations. Closing snapshot: PRE1.

After full time, the model's directional lean matched the result (Sampaio Corrêa RJ win 1–0).

Market Assessment

The statistical fair estimate is materially higher than the market on São Gonçalo EC RJ.

  • The model may see a slower-scoring or closer matchup than the market.
  • Monitor line movement before kickoff — not a betting recommendation.

Post Match Insights

What worked

  • Under 2.5 goals aligned with the xG profile
  • Exact score 1–0 fell within the model's highlighted bins

What failed

  • Both Teams To Score: model leaned BTTS Yes; match finished BTTS No

Market lesson

Large model–market gaps do not automatically mean the market is right. Here the closing market priced Sampaio Corrêa RJ more conservatively (19.0% vs model 36.1%, 17.1 pp), but the model's lean was validated (Sampaio Corrêa RJ win 1–0).

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Prediction Timeline

How this prediction moved from forecast to full-time review.

  1. Aug 12, 2026 · 17:44 UTC Forecast generated
    • Model 1X2 · Sampaio Corrêa RJ 36.1% · Draw 29.7% · São Gonçalo EC RJ 34.2%
    • xG · Sampaio Corrêa RJ 1.32 — São Gonçalo EC RJ 1.28
  2. Aug 12, 2026 · 17:14 UTC Opening odds snapshot PRE30
    • 1X2 odds · Sampaio Corrêa RJ 1.64 · Draw 2.89 · São Gonçalo EC RJ 5.06
    • Implied 1X2 · Sampaio Corrêa RJ 52.9% · Draw 30.0% · São Gonçalo EC RJ 17.1%
    • Bookmaker · Pinnacle
  3. Aug 12, 2026 · 17:44 UTC Closing snapshot recorded PRE1
    • 1X2 odds · Sampaio Corrêa RJ 1.64 · Draw 2.89 · São Gonçalo EC RJ 5.06
    • Implied 1X2 · Sampaio Corrêa RJ 52.9% · Draw 30.0% · São Gonçalo EC RJ 17.1%
    • Bookmaker · Pinnacle
  4. Aug 12, 2026 · 17:45 UTC Kickoff
  5. FT Full-time result Sampaio Corrêa RJ win · 1–0
  6. FT Prediction validated Directional lean matched full-time result
  7. Archived Prediction review

Historical Snapshot

Frozen at kickoff — the model output as it stood before the match started.

Historical verdict: Monitor
Historical Decision Monitor
Outcome Validated
Pre-match metrics (historical context)
Prediction Reliability 54/100 · Moderate
  • Validation: Warning
  • Large market gap (17 pp)
Evidence ★★★★★
  • Statistical edge detected
  • Pricing remains divergent
  • Validation warning
Pricing proximity (inverse gap) 14/100
Betting Confidence 43/100

Validation Report

Immutable Snapshot

Prediction Time: Aug 06, 2026 · 01:28 UTC Snapshot ID: dp-3094391

Closing Odds 5.06
AI Fair Odds —
CLV Pending
Final Result Sampaio Corrêa RJ win · Sampaio Corrêa RJ 1–0 São Gonçalo EC RJ
Prediction ✔ Correct
Decision Grade B-

Model Performance

This prediction contributes to:

  • Primary Bets ROI (180d): -100.0%

Review FAQ

How accurate was the prediction?
This page grades directional markets (1X2, Over/Under 2.5, BTTS) against the full-time result. The prediction grade reflects how many of those tracked markets matched reality.
What does xG Accuracy measure?
xG Accuracy compares the model's pre-match expected-goals profile to the actual scoreline — not whether every market hit. A strong directional review can coexist with a moderate xG accuracy score.
Why wasn't the exact score predicted?
Correct-score outcomes are low-probability tails even when the model reads the match profile well. We highlight top score bins for context; missing the exact line does not invalidate a directional review.
Does this improve the AI record?
Each finished match is logged in our validation pipeline. Aggregated hit rates and CLV studies are published separately — this page is the per-match audit trail.

Predictions are for informational purposes only. Always gamble responsibly and within your limits. Past performance does not guarantee future results.

AI match briefing

AI Match Summary

Below is a compact, numbers-first snapshot aligned with the same engine as the cards above.

  • League: Copa Rio
  • Fixture: Sampaio Corrêa RJ vs São Gonçalo EC RJ
  • Kickoff: 2026-08-12 17:45:00
  • 1X2 (model): Home 36.1% · Draw 29.7% · Away 34.2%
  • xG (showing): Sampaio Corrêa RJ 1.32 — São Gonçalo EC RJ 1.28 (total xG ≈ 2.6)
  • Value headline: None — no positive EV on tracked lines at current best prices (same as the decision block: no default bet).
  • Structural leans (not bets): Structural lean (model): O/U 2.5 Under 2.5 (Under 2.5 51.8% · Over 2.5 48.2%); BTTS Yes (Yes 54.5% · No 45.5%) Value lean (pricing): O/U 2.5 Under 2.5; BTTS Yes
  • BTTS (model): Yes 54.5% · No 45.5%
  • Correct score (top bin): 1-1 (12.5%)

The decision block shows no default Primary: Primary needs consensus EV ≥ +5.0% plus strength/reliability/calibration gates. A separate Lean/tracked gate is +2.0% (selective only). Lean labels are directional only — not bankroll-sized recommendations.

Prefer skipping to over-staking when the engine is honest about missing edge.

Historical Recommendation

Historical Decision: Monitor

Outcome: Validated — Pre-match lean validated against the full-time result.

Risk Factors Considered Before Kickoff

  • Price movement: implied probabilities and EV move with odds.
  • Sample / data gaps: low-information leagues widen forecast bands.
  • In-play state: goals and red cards are not modelled here.
  • Scoreline variance: the most likely scoreline is still usually a low absolute probability outcome (often well below 20%).

Last Updated

September 27, 2026 (UTC)

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