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November 15, 2013

Wagering practice – figuring out a two-day final

Since we’re in tournament mode, let’s turn our sights to next week’s two-game final match.

This scenario comes from the 2008 College Championship. The yellow scores are the totals from Game 1, which will be added to the totals from the present game. What should each player wager?

Thanks to wjmorris3 for pointing out that players keep whatever they win, subject to a minimum. The guarantees here were $100k for the champion, $50k for second, and $25k for third.

2008 Jeopardy! College Championship finals Slide01

If you’re unsure how to approach this, fear not – I’ll explain it to you soon!

(Thanks to the J! Archive)

Answers to the previous scenario:

This situation comes from the third semifinal of the 2004 Tournament of Champions. What shall each player do? It’s trickier than it looks – and I’ll break my thinking into two sections.

(click to view as a slideshow)

Now, we turn it up a bit to look at some advanced thinking – “poker” if you will.

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  1. wjmorris3 permalink

    A reminder that must be put in – on a two day final, if the contestants score higher than the stated prize, they keep the overage.

    Okay, first off, I have Joey needing to bet 16,401 in order to hold off Danielle as Danielle would have 56000 if she doubled up.

    He misses on this wager, and he’s down to $23,199 – which means Danielle could in theory bet everything and still finish ahead if they both got it wrong. But Danielle shouldn’t bet any more than $10,201. In fact, I would bet exactly $10,201 on it in an attempt to maximize winnings – that year, second place paid $50,000, so anything bet over $7,000 is money bet at no risk (!)

    Andrew, unfortunately, is playing for second place here if bets are rational. But he needs to get it right in order to have any hope at second place, so he might as well bet it all. Again, maximizing winnings is the key here – third place paid $25,000 anyways so anything bet over $2,602 is potentially found money.

    • Good point! I’ve added that info to the post.

      Your recommended wager for Danielle could run into some HUGE problems. I’ll explain next week, but if you’re chomping at the bit, check out the actual wagers in the link above.

      • wjmorris3 permalink

        I see 10201 as the maximum wager that still guarantees second place. Andrew gets to $32,798 at the most and Danielle would finish at $32,799 if wrong.

      • wjmorris3 permalink

        And now I see the huge problems. Maybe a bet of 0 is in order for Danielle, to force Joey to get it right to win.

  2. Kelly permalink

    @wjmorris3 – The situation you found is possible in multi-day wagering but not in single-day matches because a smaller first-day total and a larger second-day one (Joey here) can give you the ability to cover and win if right despite not being cumulatively to that point in the lead, while a player with a large first-day total and a smaller second-day one (Danielle here) has the ability to wager to win on a double-stumper while still forcing the opponent to have to wager and get Final right to be able to win at all (in other words, unlike in a one-day match, a player in Joey’s position cannot make a small/unsafe wager and guarantee a win on a double stumper as an alternative to covering if he’s uncomfortable with the category).

    • Kelly permalink

      Oops – should have been posted under the appropriate comment.

    • Yes, the score from game 1 can add some interesting kinks. For example: Joey is in the lead in this individual game, but if both he and Danielle wager zero, Danielle will win. And this situation is rather tame.

      • Kelly permalink

        If my math is correct this kind of scenario will occur whenever the contestant with the higher cumulative total (in this game Danielle) and the highest maximum possible total (in this game Joey) at the end are not the same. In such a case the player in the latter position really has no option but to make the cover bet, while whoever is in the former position should limit his/her wager to stay above the opponent’s cumulative total and force him/her to be right to have any chance at winning (unless a larger bet is needed to cover the third player, which wasn’t the case in the example game).

  3. Andy S permalink

    Andrew: 10398
    Danielle: 10201
    Joey: 16401

What do you think?