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 Originally Posted by rdqlus
Anyways, the pot odds calculation to determine if you should call his $10 re-raise is as follows:
The money in the pot was $36 (or so) and you needed to call a $10 bet. That means that there is a $46 pot to be won. So, your pot odds percentage is 21.7% (10/46). You have 9 outs to complete your flush draw so that's about 17-18%. Which is less than your pot odds so you should fold. What makes it worse is that the board is paired ... so even if you do hit your flush you could be beaten by a full house anyways.
Hope that helps (some people use odds instead of percentages ... I was never very good at those so I stick with % - works for me)
mj
You do not count the $-amount you are about to call as already being in the pot when you calculate pot odds. You want to know what your possible pay off is relative to how much new money you need to immediately invest to possibly win the current pot size. It's all about risk versus reward. By analogy, when you make an investment in stocks, you don't consider how much you have to invest up-front to be part of your eventual profits. You initial investment is what you risk, and your profits are your rewards.
So, in this example, your pot odds are: 36:10 or 3.6:1
In other words, the pot is immediately paying you $3.6 for every $1 additional dollar you put at risk to win it.
In general,
immediate pot odds = current pot size/immediate call amount
Many players use the following formula to make immediate pot odds based decisions:
[pots odds]*[number of clean outs] = x
By immediate pot odds considerations alone, if x> [number of cards left in deck - # of clean outs] (where "cards left in deck" is 47 or 46 depending on which street you are on) you should call.
(to check the math yourself, set [pot odds = pot$/call$]*[# of clean outs] equal to [number of cards left in deck - # of clean outs] and you can prove to yourself that is defines the break even point defined by pot$/call$ = cards that help/cards that don't = outs/[# of un-seen cards - outs].
Technically, "# of cards left in deck" is a slightly deceiving phrase because some of those cards "in the deck" are actually already in the muck pile, in the burn pile, or in your remaining opponents hands, but because they are considered unknown you treat that them as "left in the deck" unless you know otherwise. A better phrase would be "# of unseen cards"
Note that the is an immediate pot odds calculation; it ignores the cost of possible future bets, as well as implied odds.
Note also, for good reasons (see post listed below for justifications), many players use 45 rather than 46 or 47 in the above calcs.
You should also be able to prove for yourself that another good, quick, at-the-table way to determine whether calling is immediately EV-neutral is the use the following formula:
[# of clean outs]*[pot odds + 1] = x
if x >= [# of unseen cards] that's good and you call, if x<[# of unseen cards] you either fold or start considering whether implied odds might help you to still call.
Again, I also need to stress that these are immediate pot odds calculations and do not necessarily apply straight-forwardly if you will have to call additional bets on later streets. You'll have to use effective pot odds for that, which requires making assumptions about future action in that hand.
Another minor point; we've ignored the rake in the above calcs. Unless of course, it has been max'ed already and taken out of the pot when you count immediate pot size, in which case, it has been completely accounted for.
I hope this helps!
See:
http://www.flopturnriver.com/phpBB2/...highlight=odds
for (another, since this one has become a little long too ) extensive thread about pot odd calcs.
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