John-Z's Overlay · Trifecta ATM

Wed, Apr 29

Race 4

Md 50000

Post: 2:16 · 1.06m · Turf · $67K purse · 15 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

15 runners

Hot pace

6 early types pressing for the lead — expect a fast pace, favors closers (P/S).

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

Projected speed

4 of 15 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.

3-horse box on posts 6, 4, 10

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

Cost

$6.00

6 combos

Hit prob

0.8%

simulated

Typical payout if hit

$120.91

mean $122.61

Expected ROI

-83.5%

net $-5.01

  • · Most-likely-to-cash structure: 3-horse box on posts [6, 4, 10] — hits 0.8% of simulated runs
  • · At $6 stake, a typical cash pays ≈ $121 (mean $123; 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

B Contenders

4, 10, 7

C Value-edge longshots

11, 3

Other ticket structures (5)
Ticket Cost Hit prob Typical payout ROI
1×3×3 key (top pick) $6.00 0.8% $78.29 -85%
A key, B in 2nd, A+B+C in 3rd $12.00 1.4% $101.87 -78%
1×4×4 key (top pick) $12.00 1.4% $101.87 -78%
2×4×4 part wheel $12.00 1.5% $84.63 -85%
1×5×5 key (top pick) $20.00 2.2% $101.87 -83%

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: 37% · Top 4 cover 1.11 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
6AEABBI FEDE3.0-12.9-179.513%36%-28%
4BEPTURBO LAUNCH4.0-13.5-172.99%26%-25%
10BPFLY GUY MICK12-112-174.68%25%+5%
7BEPFERAL6.0-17.7-172.18%23%-13%
11CSHOLYROOD30-142-172.47%21%+12%
8PNEWMAN4.5-16.1-172.67%21%-26%
15EPTHE FED'S PLOT12-114-169.66%18%·-1%
12PBEARISTER15-121-171.46%18%·+2%
3CMUSH CAREY30-140-170.86%18%+10%
5EPUNDERAPPRECIATED8.0-114-170.16%18%-11%
9NYTTIME STORY30-144-170.86%18%+9%
1TRAVERSE CITY10-110-166.15%17%-7%
2EPOWER OF WILL15-120-169.85%16%·+0%
13UR BENJA15-136-168.24%13%·-3%
14SAMBERSSOHN30-151-163.94%12%·+4%

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 4 · Wed, Apr 29 · 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.