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Home Forum General AKo, 77 and standard deviation

AKo, 77 and standard deviation

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10:10 am
September 11, 2009


Sean

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AKo has 65.320% showdown equity against one random hand according to PokerStove.

77 has 66.236% showdown equity against one random hand according to PokerStove.

Most poker advice suggests re-raising with AKo, yet not with a pair of sevens even though the sevens have higher showdown equity against a random hand. Am I correct in thinking this is due to the AKo having a smaller standard deviation in all possible preflop matchups as compared to that of the pocket sevens?

Is standard deviation of starting hands something worth knowing? If so, does anyone know of a less tedious way of getting them for each hand rather than doing 1,225 PokerStove simulations for each hand?

5:53 pm
September 12, 2009


theta

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I suspect this is not because of SD concerns, but because you are not going to be playing the hand against a "random" hand. If you raise with 7s, the hands that call are not any 2, but more hands call that have you in bad shape then hands that do not have you in bad shape. A hand that has already raised is better than most hands in the total range.

With AK, if you raise, and you are called, there are 2 hands that have you in bad shape (AA, KK), and the rest of the hands are a coin flip or worse. This positions AK to be in better shape against those who call.

7:47 am
September 13, 2009


Sunny Mehta

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Post edited 2:48 pm – September 13, 2009 by Sunny Mehta

as theta alluded to, your equity against a random hand is irrelevant if your opponent's range is not “a random hand”. (will your opponent really be playing hands like 73o and 92s?) all that matters is your equity against your opponent's range.  take pokerstove and re-run your calculations, but this time instead of doing it against a random hand, first formulate a range of hands for your opponent (for whatever scenario you're trying to figure out) and then run the calculations against that range.

for example, let's say you're trying to suss out cutoff versus blind situations. you think your opponent opens about 30 percent from the cutoff. we'll say his range is something like:

22+,A2s+,K9s+,Q9s+,J9s+,T9s,98s,87s,A2o+,KTo+,QTo+,JTo

with pocket sevens you have about 55 percent equity against that range, with AK you have about 64 percent.

9:22 am
September 13, 2009


Sean

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I appreciate the feedback, guys. What I was really trying to ask in my original post is why is AKo considered a stronger hand preflop than a pair of sevens?

After running many, many PokerStove calculations, the standard deviation of AKo matchups is indeed smaller than that of pocket sevens. This explains why AKo is a stronger hand preflop than sevens.

Now if I just knew how to write code to automate this tedious process. Laugh

8:00 am
September 14, 2009


Rocketfingers

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Sean said:

I appreciate the feedback, guys. What I was really trying to ask in my original post is why is AKo considered a stronger hand preflop than a pair of sevens?

After running many, many PokerStove calculations, the standard deviation of AKo matchups is indeed smaller than that of pocket sevens. This explains why AKo is a stronger hand preflop than sevens.

Now if I just knew how to write code to automate this tedious process. Laugh

Not only your equity matters, but can you change this advantage to money? Like you open for 6$ on BTN 1/2 game and tight BB calls and the flop comes AT6, than you can hardly make any money here because you either ahead and your opponent will fold to a bet or he is ahead and you are drawing to two outs. Now say somebody goes all1 you are last to act he showes his AK than you have to call with 77 and you will show up a prety good profit here because there is no post flop play. In a 20BB max game 77 would play much better because there isn't much post flop pay so you can push wit 77 and hope they call wit AK AQ. AK plays a lot better post flop even if you miss the flop completely you will usualy have 6 out when you are behind so you can bluff a lot more compared to 77.
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