The 20-cent Rainbow 6 gross jackpot pool will be guaranteed at $550,000 Friday at Gulfstream Park.
First-race post time is set for 12:25 p.m. (ET).
The popular multi-race wager has gone unsolved for the 19 racing days following an Aug. 13 mandatory payout.
The Rainbow 6 jackpot is paid out when there is a single unique ticket sold with all six winners. On days when there is no unique ticket, 70 percent of that day’s pool goes back to those bettors holding tickets with the most winners, while 30 percent is carried over to the jackpot pool.