John-Z's Overlay · Trifecta ATM

Mon, May 25

Race 9

Md Sp Wt

Post: 4:55 · 1.06m · Turf · $120K purse · 16 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

16 runners

Contested pace

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

2 E — pure early 1 EP — early/presser 4 P — presser 6 S — closer 3 Unclassified

Projected speed

3 of 16 runners have no BRIS run-style code (often first-time starters); narrative may understate the true pace.

Trifecta shape

Wide open

Lottery shape — low hit rates, larger payouts when they cash. Entertainment-only; the model is not confident in any structure.

1×3×3 key (top pick) on posts 6, 8, 10, 12

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

Cost

$6.00

6 combos

Hit prob

0.6%

simulated

Typical payout if hit

$151.05

mean $172.06

Expected ROI

-82.0%

net $-4.92

  • · Most-likely-to-cash structure: 1×3×3 key (top pick) on posts [6, 8, 10, 12] — hits 0.6% of simulated runs
  • · At $6 stake, a typical cash pays ≈ $151 (mean $172; trifecta payoffs are heavy-tailed). Estimated from the public pool, validated against archive payoffs.
  • · Wide-open shape — anyone could hit; longshots have room.

A Top picks

6, 8

B Contenders

10, 12, 13

C Value-edge longshots

Other ticket structures (5)
Ticket Cost Hit prob Typical payout ROI
3-horse box $6.00 0.7% $127.32 -85%
1×4×4 key (top pick) $12.00 1.1% $169.34 -79%
2×4×4 part wheel $12.00 1.3% $147.80 -84%
1×5×5 key (top pick) $20.00 1.8% $249.92 -74%
2×5×5 part wheel $24.00 2.3% $166.15 -81%

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: 35% · Top 4 cover 1.05 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 Pred Fig Win ITM% Edge
6APLAHAINALUNA4.5-15.3-181.910%29%-18%
8APZIHNAL3.5-13.3-181.09%27%-30%
10BPVIVALDI6.0-16.0-177.48%25%-12%
12BEPPROVIDER6.0-17.3-178.38%25%-12%
13BPWAR AND MAJESTY8.0-111-177.98%23%-6%
11SMAXIMUS PRIME10-113-180.07%22%·-1%
5SABOUT FACE12-115-176.57%21%·+2%
15SDROP SHOT15-122-175.57%21%·+5%
4SYOUR WILDEST DREAM6.0-15.4-175.37%20%-16%
2ETIMAYYYY30-150-175.95%16%+8%
16SMOON CHANNEL12-116-172.35%16%·-4%
9SWRATHCHILD10-117-171.74%13%-10%
3DEERFIELD15-127-169.04%13%·-3%
7WILD CAT CURLIN30-147-169.34%11%·+3%
1SIYOUINCANADA15-126-168.13%10%-6%
14EPOWER OF WILL30-167-168.13%8%·+0%

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. See How to Use for the math.

Ask Claude Opus

Questions about the model's predictions for Race 9 · Mon, May 25 · 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.

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