Turfway Park in northern Kentucky plans to debut a jackpot-style bet on Wednesday requiring the selection of the first eight finishers in order, with the entire pool only paid out when there is a single winning ticket. The bet, which is being called the Octafecta, will be offered on a single race every day, according to Turfway officials, and will have a $1 minimum. Takeout for the bet will be 22 percent, and 75 percent of the pool will be paid out when there are multiple winners, with 25 percent contributed to a rolling carryover. When there are no winners, 100 percent of the pool will go into the carryover. Under Kentucky regulations, racetracks cannot offer a bet in a race unless there are two additional finish positions beyond the selection criteria for the wager. For the Octafecta, that means that betting will be limited to races with at least 10 “unique” runners. The Octafecta is clearly the most ambitious jackpot-style bet to be offered in U.S. racing history. Most jackpot-style bets have been built around superfectas or wagers requiring the selection of the first five finishers in order, usually called the Super Hi-5. The $1 minimum will also require bettors to invest heavily in the wager in order to cover a high number of combinations. Turfway Park is owned by Churchill Downs Inc., which also owns Churchill in Louisville and Ellis Park in western Kentucky. The company also operates one of the leading account-wagering companies in the U.S. According to Chip Bach, the longtime general manager of Turfway, the Octafecta will get a trial run during the Turfway Park meet. For now, a mandatory payout is being planned for sometime late in Turfway’s meet, but CDI officials are also considering the possibility of having the bet carry over from Turfway Park’s winter-spring meet to Churchill’s spring-summer meet, and then perhaps to Ellis’s summer meet, Bach said.