Predictions / Football / Japan. J-League Cup / Montedio Yamagata vs Yokohama F. Marinos

Prediction Audit: Montedio Yamagata vs Yokohama F. Marinos Prediction, Odds & AI Betting Tips

Montedio Yamagata Montedio Yamagata
Sep 29, 2026 - 10:00
1 1.31
2 1.29
xG Accuracy: 76%
Yokohama F. Marinos Yokohama F. Marinos

The model missed the final outcome (Yokohama F. Marinos win 1–2).

The model had projected Montedio Yamagata at 35.6%, but the full-time result went the other way.

Tracked markets vs full-time result

Prediction grade F

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

  • Market Prediction Result Outcome
  • Over / Under 2.5 Under 2.5 Over 2.5 (3 goals) ✖ Incorrect
  • Both Teams To Score BTTS Yes Yes ✔ Correct
  • 1X2 Montedio Yamagata Yokohama F. Marinos ✖ Incorrect
  • Correct Score Insights 1-1, 1-0, 0-1, 2-1, 1-2 1-2 ✔ Correct

Model vs Closing Market

Strong Disagreement

The closing market prices Yokohama F. Marinos higher than the statistical model.

Largest probability gap: Yokohama F. Marinos -21.8 pp

Outcome Model Closing Market Difference Signal
Montedio Yamagata 35.6% 19.4% +16.2 pp Model Edge
Draw 29.6% 24.0% +5.6 pp Model Higher
Yokohama F. Marinos 34.7% 56.5% -21.8 pp Market Higher

The closing market estimates Yokohama F. Marinos's win probability at 56.5%, compared with the model's estimate of 34.7%, a difference of 21.8 percentage points. This highlights a disagreement between the model and market consensus, without 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 result was Yokohama F. Marinos win 1–2.

Post Match Insights

What worked

  • Expected goals projected a high-scoring match (ΣxG 2.60) — 3 goals materialised
  • Both Teams To Score (Yes) matched the full-time result
  • Exact score 1–2 fell within the model's highlighted bins

What failed

  • Over / Under 2.5: model leaned Under 2.5; match finished Over 2.5 (3 goals)
  • 1X2: model leaned Montedio Yamagata; match finished Yokohama F. Marinos

Market lesson

The closing market differed from the model on Montedio Yamagata by 21.8 percentage points (57.4% vs model 35.6%) — in this case the market view proved closer.

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Prediction Timeline

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

  1. Sep 29, 2026 · 10:01 UTC Forecast generated
    • Model 1X2 · Montedio Yamagata 35.6% · Draw 29.7% · Yokohama F. Marinos 34.7%
    • xG · Montedio Yamagata 1.31 — Yokohama F. Marinos 1.29
  2. Sep 29, 2026 · 09:31 UTC Opening odds snapshot PRE30
    • 1X2 odds · Montedio Yamagata 4.77 · Draw 3.86 · Yokohama F. Marinos 1.64
    • Implied 1X2 · Montedio Yamagata 19.4% · Draw 24.0% · Yokohama F. Marinos 56.5%
    • Bookmaker · Pinnacle
  3. Sep 29, 2026 · 10:01 UTC Closing snapshot recorded PRE1
    • 1X2 odds · Montedio Yamagata 4.77 · Draw 3.86 · Yokohama F. Marinos 1.64
    • Implied 1X2 · Montedio Yamagata 19.4% · Draw 24.0% · Yokohama F. Marinos 56.5%
    • Bookmaker · Pinnacle
  4. Sep 29, 2026 · 10:00 UTC Kickoff
  5. FT Full-time result Yokohama F. Marinos win · 1–2
  6. FT Prediction missed 1X2 lean did not match full-time result
  7. Archived Prediction review

Historical Snapshot

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

Historical verdict: Cautious / Wait

Historical label: Originally displayed as "Wait for validation".

Historical Decision Wait
Outcome Missed
Pre-match metrics (historical context)
Prediction Reliability 52/100 · Moderate
  • Validation: Warning
  • Large market gap (22 pp)
Evidence ★★★★★
  • No strong statistical edge
  • Pricing remains divergent
  • Validation warning
Pricing proximity (inverse gap) 0/100
Monitoring Confidence 14/100

Validation Report

Immutable Snapshot

Prediction Time: Sep 23, 2026 · 01:58 UTC Snapshot ID: dp-10418240

Closing Odds 1.64
AI Fair Odds —
CLV Pending
Final Result Yokohama F. Marinos win · Montedio Yamagata 1–2 Yokohama F. Marinos
Prediction ✖ Missed
Decision Grade F

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: J-League Cup
  • Fixture: Montedio Yamagata vs Yokohama F. Marinos
  • Kickoff: 2026-09-29 10:00:00
  • 1X2 (model): Home 35.6% · Draw 29.7% · Away 34.7%
  • xG (showing): Montedio Yamagata 1.31 — Yokohama F. Marinos 1.29 (total xG ≈ 2.6)
  • Best +EV line (same label as hero card when Primary thresholds are not met): Under 2.5 goals
  • Model: 51.8% · Implied: 45.8% · Probability edge: +6.0 pts · Est. EV: +8.8%
  • BTTS (model): Yes 54.5% · No 45.5%
  • Correct score (top bin): 1-1 (12.6%)

Use the cards for tiering; this text only restates the same inputs in narrative form.

Early match state can move realised goals away from pre-kick projections.

Historical Recommendation

Historical Decision: Wait

Outcome: Missed — Pre-match 1X2 lean did not match 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

October 01, 2026 (UTC)

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