A Quinella consists of nominating two (or more) runners to place first and second in any order. You can select as many runners as you want and make it a boxed Quinella, or also pick a standout for first or second position.
Quinella:
Quinella bets require the selections to finish in 1st and 2nd place, in any order, to be successful.
Boxed Quinella:
Boxed Quinella bets require any of the selections to finish in 1st and 2nd place, in any order, to be successful.
If a selected runner is declared a "non-runner" or scratched after the wager is confirmed, wagers will be refunded on every combination which includes the scratched runner and the combination stands and the wager re-calculated without the scratched runner.