John-Z's Overlay · Trifecta ATM

Fri, May 1

Race 1

Md Sp Wt

Post: 12:30 · 1.06m · Dirt · $120K purse · 7 runners · LIVE Trifecta math uses live odds for 7 of 7 runners

New — Ask Claude Opus about this race Why a horse rates the way it does, what the trifecta ticket means, where the public might be wrong.

Pace shape

7 runners

Contested pace

2 early types — pace should be honest but not crazy. No strong style bias.

2 E — pure early 2 P — presser 1 S — closer 2 Unclassified

Projected speed

2 of 7 runners have no BRIS run-style code (often first-time starters); narrative may understate the true pace.

Trifecta shape

Competitive

Model has no clear edge — every ticket structure is steeply negative-EV. Skip, or treat as an entertainment bet and size accordingly.

3-horse box on posts 1, 7, 5

The model's most-likely-to-cash structure (informational — not a bet recommendation).

Cost

$6.00

6 combos

Hit prob

8.5%

simulated

Typical payout if hit

$17.24

mean $25.65

Expected ROI

-63.7%

net $-3.82

  • · Most-likely-to-cash structure: 3-horse box on posts [1, 7, 5] — hits 8.5% of simulated runs
  • · At $6 stake, a typical cash pays ≈ $17 (mean $26; trifecta payoffs are heavy-tailed). Estimated from the public pool, validated against archive payoffs.
  • · Multiple legitimate contenders — model is less concentrated.

A Top picks

1

B Contenders

7, 5, 6

C Value-edge longshots

4, 2

Other ticket structures (5)
Ticket Cost Hit prob Typical payout ROI
1×3×3 key (top pick) $6.00 8.3% $15.51 -77%
A key, B in 2nd, A+B+C in 3rd $12.00 14.0% $17.24 -71%
2×4×4 part wheel $12.00 13.9% $17.24 -72%
1×4×4 key (top pick) $12.00 14.7% $17.24 -79%
1×5×5 key (top pick) $20.00 22.2% $17.24 -72%

Hit prob is the model's per-race PL distribution. "Typical payout" is the median cash, weighted by the public pool's odds (not the model's own picks) and calibrated to actual historical trifecta payoffs — so it reflects what the tote really pays, not the model's disagreement. Walk-forward backtests show pari-mutuel takeout (~16-26%) is too steep to consistently clear at this data scale — these are tipsheet outputs, not bet recommendations.

Top-4 ITM concentration: 67% · Top 4 cover 2.02 of the 3.00 expected ITM finishers

Field

Click any horse name for the per-horse breakdown (last-10-races chart, SHAP feature contributions, full PP table).

PP Horse ML Pred Close Live Pred Fig Win ITM% Edge
1AEPHANTOM BLUE0.8-10.5-10.6-185.329%71%-29%
7BPEPISIST4.0-14.7-1·4.5-178.516%49%·+3%
5BEMASS8.0-19.1-1·7.0-176.114%45%+13%
6BSOARING HIGH3.5-13.6-16.0-173.911%37%·+1%
3PSISTER JEAN12-120-16.0-175.811%36%·-1%
4CSHAYWINII20-142-128-173.210%33%+24%
2CBUTTERFLY JASMINE15-122-1·15-170.88%29%+13%

Sort the table by clicking column headers. Edge = our predicted ITM% minus the public-implied ITM% (live odds when present, ML otherwise); green ▲ ≥ +5pp, red ▼ ≤ −5pp. Live column: ↓ green = ≥25% shorter than ML (money horse); ↑ red = ≥25% longer (drifting). See How to Use for the math.

Ask Claude Opus

Questions about the model's predictions for Race 1 · Fri, May 1 · Churchill Downs. Powered by Claude Opus 4.7.

Ask anything about the field, the trifecta ticket, or why the model rates a horse the way it does.

Limited to 30 questions per day per visitor. Answers are model-generated and may be incorrect — not betting advice.