It’s closing day of the Gulfstream Park spring-summer meeting, which means a mandatory payout in the Rainbow 6. The $745,397 carryover will attract a multi-million dollar pool and create overlay payoffs for those lucky enough to take down the 20-cent base wager.

Selections provided by the 1/ST INDEX measure each contender against the 10 leading factors for each race. The 1/ST BET app looks at 52 handicapping factors and more than 200,000 past races to determine its AI selections. You can use the automated handicapping factors, or create your own factor filters to incorporate angles you prefer.

Race 7 (3:22PM ET) // claiming // 5 furlongs (turf)

7 – Fort King (29% W)
6 – I’m Cardinal (14% W)
4 – Mar Vista Miguel (13% W)
1 – Earth (6% W)

Notable: At 7-2 in the morning line, Fort King is a much stronger selection by the 1/ST INDEX than the price indicates, 15 points higher than any other runner. These connections (Jaramillo/Baxter) are superb in local turf sprints.

Race 8 (3:55PM ET) // claiming // 7 furlongs

7 – Witch Hunter (30% W)
3 – Panarea (16% W)
2 – Chez Paree (12% W)
5 – Bibiana (10% W)

Notable: Panarea is a strong 8-5 morning line favorite, but 12-1 Witch Hunter gives a price alternative for those not convinced. And it’s a stark choice by the 1/ST INDEX by 14 points.

Race 9 (4:27PM ET) // allowance // 1 mile (turf)

7 – Aerodynamic (30% W)
2 – Dynatown (13% W)
3 – Centsless Drama (13% W)
15 – Free to Fly (8% W)
1 – Bajan Girl (7% W)

Notable: The top pick offers a nice 6-1 price and 17-point spread to the 9-5 morning line favorite Dynatown. That’s the largest spread for a top pick in the Rainbow 6 today.

Race 10 (4:59PM ET) // allowance // 6 furlongs

6 – Frosted Grace (31% W)
4 – Yodel E.A. Who (21% W)
3 – Royal Squeeze (14% W)
7 – Travy Boy (14% W)

Notable: Morning line favorite Frosted Grace is a pretty solid choice, and in a field of 7 this could be a place to narrow the ticket. The 31% rating is tied for highest in the sequence of any top choice.

Race 11 (5:29PM ET) // allowance // 1 mile (turf)

3 – Lovely Luvy (31% W)
6 – Great Sister Diane (15% W)
7 – Remarkable Soul (15% W)
8 – Bienville Street (9% W)

Notable: Rarely to you get 6-1 on the Zayas-Joseph tandem, so top choice Lovely Luvy likely drops in price. The 16-point spread is second-largest in the Rainbow 6 sequence today. The 31% rating is tied for highest in the sequence of any top choice.

Race 12 (5:59PM ET) // claiming // 5 furlongs turf

7 – Gran Diamond (27% W)
13 – Two Cents Worth (13% W)
3 – More Diamonds (12% W)
1 – Lecomcita (6% W)
14 – Dinner at Five (6% W)
16 – Reiterate (6% W)

Notable: Large field turf sprints can be scrambles, so this isn’t a bad place to consider some depth. However, Gran Diamond offers a 5-1 morning line proposition for top connections in Jaramillo and Barboza.