Predictions / Football / Iceland. 1. Deild / Grotta vs Njardvik

Prediction Audit: Grotta vs Njardvik Prediction, Odds & AI Betting Tips

Aug 13, 2026 - 19:15
1 1.20
4 1.40
xG Accuracy: 46%

AI correctly predicted the Njardvik win.

The match finished 1–4, 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 Over 2.5 (5 goals) ✖ Incorrect
  • Both Teams To Score BTTS Yes Yes ✔ Correct
  • 1X2 Njardvik Njardvik ✔ Correct
  • Correct Score Insights 1-1, 0-1, 1-0, 1-2, 2-1 1-4 ✖ Incorrect

Model vs Closing Market

Moderate Disagreement

The closing market prices Njardvik higher than the statistical model.

Largest probability gap: Njardvik -8.2 pp

Outcome Model Closing Market Difference Signal
Grotta 30.6% 27.9% +2.7 pp Aligned
Draw 29.5% 24.0% +5.5 pp Model Higher
Njardvik 39.9% 48.1% -8.2 pp Market Higher

The closing market estimates Njardvik's win probability at 48.1%, compared with the model's estimate of 39.9%, a difference of 8.2 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 model's directional lean matched the result (Njardvik win 1–4).

Market Assessment

The market and model broadly agree on Njardvik. The remaining divergence may reflect differences in team-strength assumptions rather than a directional disagreement.

  • Monitor line movement before kickoff — not a betting recommendation.

Post Match Insights

What worked

  • Expected goals projected a high-scoring match (ΣxG 2.60) — 5 goals materialised
  • Both Teams To Score (Yes) matched the full-time result

What failed

  • Over / Under 2.5: model leaned Under 2.5; match finished Over 2.5 (5 goals)
  • Exact score: outside the model's top score bins

Market lesson

Large model–market gaps do not automatically mean the market is right. Here the closing market priced Njardvik higher (48.1% vs model 39.9%, 8.2 pp), but the model's lean was validated (Njardvik win 1–4).

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Prediction Timeline

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

  1. Aug 13, 2026 · 19:14 UTC Forecast generated
    • Model 1X2 · Grotta 30.6% · Draw 29.5% · Njardvik 40.0%
    • xG · Grotta 1.20 — Njardvik 1.40
  2. Aug 13, 2026 · 18:44 UTC Opening odds snapshot PRE30
    • 1X2 odds · Grotta 3.33 · Draw 3.87 · Njardvik 1.93
    • Implied 1X2 · Grotta 27.9% · Draw 24.0% · Njardvik 48.1%
    • Bookmaker · Pinnacle
  3. Aug 13, 2026 · 19:14 UTC Closing snapshot recorded PRE1
    • 1X2 odds · Grotta 3.33 · Draw 3.87 · Njardvik 1.93
    • Implied 1X2 · Grotta 27.9% · Draw 24.0% · Njardvik 48.1%
    • Bookmaker · Pinnacle
  4. Aug 13, 2026 · 19:15 UTC Kickoff
  5. FT Full-time result Njardvik win · 1–4
  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: Observe
Historical Decision No Primary Bet
Outcome Validated
Pre-match metrics (historical context)
Prediction Reliability 75/100 · High
  • Validation: Pass
Evidence ★★★★★
  • No strong statistical edge
  • Direction agrees with model lean
  • Validation passed
Pricing proximity (inverse gap) 59/100
Betting Confidence 78/100

Validation Report

Immutable Snapshot

Prediction Time: Aug 07, 2026 · 01:56 UTC Snapshot ID: dp-3153819

Closing Odds 1.93
AI Fair Odds —
CLV Pending
Final Result Njardvik win · Grotta 1–4 Njardvik
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

Pre-match snapshot for this fixture.

  • League: 1. Deild
  • Fixture: Grotta vs Njardvik
  • Kickoff: 2026-08-13 19:15:00
  • 1X2 (model): Home 30.6% · Draw 29.5% · Away 40.0%
  • xG (showing): Grotta 1.2 — Njardvik 1.4 (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 54.3% · No 45.7%) Value lean (pricing): O/U 2.5 Under 2.5; BTTS Yes
  • BTTS (model): Yes 54.3% · No 45.7%
  • Correct score (top bin): 1-1 (12.5%)

When book depth is thin or odds are missing, EV may be unavailable even though the model still prefers one side on totals or BTTS — wait for cleaner prices or skip.

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

Historical Recommendation

Historical Decision: No Primary Bet

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 29, 2026 (UTC)

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Back to Predictions
1. Deild 1. Deild — Standings
# TEAM MP W D L PTS
1 Afturelding 22 14 3 5 45
2 Throttur Reykjavik 22 13 4 5 43
3 Fylkir 22 13 1 8 40
4 HK Kopavogur 22 12 2 8 38
5 Njardvik 22 12 2 8 38
6 Leiknir R. 22 8 4 10 28
7 IR Reykjavik 22 8 4 10 28
8 Grotta 22 8 3 11 27
9 Vestri 22 8 3 11 27
10 Völsungur 22 7 5 10 26
11 Grindavik 22 5 10 7 25
12 Ægir 22 2 3 17 9
# TEAM MP GS GC +/- PTS
1 Afturelding 22 65 33 +32 45
2 HK Kopavogur 22 52 40 +12 38
3 Throttur Reykjavik 22 50 25 +25 43
4 Fylkir 22 49 36 +13 40
5 IR Reykjavik 22 40 46 -6 28
6 Njardvik 22 38 29 +9 38
7 Grotta 22 36 43 -7 27
8 Leiknir R. 22 34 33 +1 28
9 Völsungur 22 32 44 -12 26
10 Vestri 22 30 43 -13 27
11 Grindavik 22 25 35 -10 25
12 Ægir 22 25 69 -44 9