Predictions / Football / Chile. Primera B / San Marcos de Arica vs Rangers de Talca

Prediction Audit: San Marcos de Arica vs Rangers de Talca Prediction, Odds & AI Betting Tips

San Marcos de Arica San Marcos de Arica
Aug 22, 2026 - 00:30
1 1.34
2 1.26
xG Accuracy: 74%
Rangers de Talca Rangers de Talca

The model missed the final outcome (Rangers de Talca win 1–2).

The model had projected San Marcos de Arica at 37.1%, 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 San Marcos de Arica Rangers de Talca ✖ Incorrect
  • Correct Score Insights 1-1, 1-0, 0-1, 2-1, 1-2 1-2 ✔ Correct

Model vs Closing Market

Strong Disagreement

The model rates Rangers de Talca considerably stronger than the closing betting market.

Largest probability gap: Rangers de Talca +10.2 pp

Outcome Model Closing Market Difference Signal
San Marcos de Arica 37.1% 47.0% -10.0 pp Market Higher
Draw 29.6% 29.9% -0.2 pp Aligned
Rangers de Talca 33.3% 23.1% +10.2 pp Model Edge

The statistical model estimates Rangers de Talca's win probability at 33.3%, compared with the closing market's implied probability of 23.1%, a difference of 10.2 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 result was Rangers de Talca win 1–2.

Market Assessment

The statistical fair estimate is materially higher than the market on Rangers de Talca.

  • 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

  • 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 San Marcos de Arica; match finished Rangers de Talca

Market lesson

The closing market differed from the model on San Marcos de Arica by 10.2 percentage points (26.9% vs model 37.1%) — 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. Aug 22, 2026 · 00:29 UTC Forecast generated
    • Model 1X2 · San Marcos de Arica 37.0% · Draw 29.6% · Rangers de Talca 33.4%
    • xG · San Marcos de Arica 1.34 — Rangers de Talca 1.26
  2. Aug 21, 2026 · 23:59 UTC Opening odds snapshot PRE30
    • 1X2 odds · San Marcos de Arica 1.90 · Draw 2.99 · Rangers de Talca 3.87
    • Implied 1X2 · San Marcos de Arica 47.0% · Draw 29.9% · Rangers de Talca 23.1%
    • Bookmaker · Pinnacle
  3. Aug 22, 2026 · 00:29 UTC Closing snapshot recorded PRE1
    • 1X2 odds · San Marcos de Arica 1.90 · Draw 2.99 · Rangers de Talca 3.87
    • Implied 1X2 · San Marcos de Arica 47.0% · Draw 29.9% · Rangers de Talca 23.1%
    • Bookmaker · Pinnacle
  4. Aug 22, 2026 · 00:30 UTC Kickoff
  5. FT Full-time result Rangers de Talca 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: Monitor
Historical Decision Monitor
Outcome Missed
Pre-match metrics (historical context)
Prediction Reliability 58/100 · Moderate
  • Validation: Warning
  • Large market gap (10 pp)
Evidence ★★★★★
  • Statistical edge detected
  • Market has already priced much of the edge
  • Validation warning
Pricing proximity (inverse gap) 48/100
Betting Confidence 46/100

Validation Report

Immutable Snapshot

Prediction Time: Aug 16, 2026 · 00:51 UTC Snapshot ID: dp-4209119

Closing Odds 3.87
AI Fair Odds —
CLV Pending
Final Result Rangers de Talca win · San Marcos de Arica 1–2 Rangers de Talca
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

Quick read on how the model reads this matchup.

  • League: Primera B
  • Fixture: San Marcos de Arica vs Rangers de Talca
  • Kickoff: 2026-08-22 00:30:00
  • 1X2 (model): Home 37.0% · Draw 29.6% · Away 33.4%
  • xG (showing): San Marcos de Arica 1.34 — Rangers de Talca 1.26 (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%)

Saying “no value” on a snapshot is a feature, not a bug: it protects readers from forcing a play when the edge is not there.

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

Historical Recommendation

Historical Decision: Monitor

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

September 29, 2026 (UTC)

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Primera B Primera B — Standings
# TEAM MP W D L PTS
1 Santiago Wanderers 24 12 8 4 44
2 Cobreloa 24 11 9 4 42
3 San Luis 24 11 8 5 41
4 Magallanes 25 11 7 7 40
5 Antofagasta 25 10 8 7 38
6 Recoleta 25 10 8 7 38
7 San Marcos de Arica 25 9 9 7 36
8 Union Espanola 25 10 6 9 36
9 D. Puerto Montt 25 10 4 11 34
10 Deportes Temuco 25 8 8 9 32
11 Deportes Copiapo 24 8 7 9 31
12 Deportes Iquique 25 6 10 9 28
13 Curico Unido 25 6 9 10 27
14 Deportes Santa Cruz 25 4 10 11 22
15 Union San Felipe 23 5 7 11 22
16 Rangers de Talca 25 4 6 15 18
# TEAM MP GS GC +/- PTS
1 Antofagasta 25 42 26 +16 38
2 Cobreloa 24 42 27 +15 42
3 Magallanes 25 41 38 +3 40
4 Santiago Wanderers 24 40 25 +15 44
5 Deportes Temuco 25 40 35 +5 32
6 San Luis 24 38 29 +9 41
7 Recoleta 25 36 33 +3 38
8 Deportes Iquique 25 33 30 +3 28
9 Deportes Copiapo 24 33 38 -5 31
10 Union Espanola 25 32 32 0 36
11 San Marcos de Arica 25 31 23 +8 36
12 D. Puerto Montt 25 26 31 -5 34
13 Deportes Santa Cruz 25 26 38 -12 22
14 Rangers de Talca 25 23 40 -17 18
15 Curico Unido 25 22 38 -16 27
16 Union San Felipe 23 15 37 -22 22
Primera B Chile. Primera B Predictions