Survivor 51 · premieres September 23

Back the castaways you think go deep, change your mind whenever you want, and watch the league's picks move every week.

• Bet on who goes far. Every week you back a winner, three finalists and a jury. Those bets pay out only if those castaways actually get there.
• Early bets are worth more. A bet placed while twenty castaways are still in is worth more than the same bet at final five — it was a harder call, so it pays better.
• Changing your mind is free. There is no penalty for switching. You keep every bet you have already placed on the old pick, and start placing them on the new one.
• A few guesses each episode. Call the vote-out, name who said the quote of the week, and answer whatever the commissioner cooks up.