Quote:
Originally Posted by MIB211
Interesting discussion on AIEV here.
A couple thoughts I had:
1. By eliminating one (but not all) forms of variance, a correctly calculated AIEV number should always be a better indicator of your performance than actual results. Obviously not perfect as there are other forms of variance (being on the right side of coolers, getting strong hands, flopping sets, etc.), but should be better.
2. Unfortunately, Mike can't calculate true AIEV because he doesn't always see the other player's hand. That means that while he's eliminating one form of variance, he's potentially introducing bias into his calculation, most likely by persistently underestimating the equity of hands he doesn't see. For instance, when Mike gets it in on a draw, he also gets to see that he has some runner-runner outs that give him an extra 5% equity, and that he'll rightfully credit himself with. However, when his opponent bricks and doesn't show, Mike doesn't know his opponent's exact hand and has to estimate it. As a human being, he's probably underestimating his opponent's equity here, ignoring runner-runner draws, assuming that V has a draw, rather than a combo draw, etc. So, it's likely that his AIEV number is skewed in his favor, and it's possible that this bias overcomes the impact of reducing variance and makes the AIEV number a worse calculation of results, rather than better.
Mike - Say you get it in with 9h7h on a T97ss flop. Turn and river are 2d and 3c, and you win. How much equity do you credit yourself with here?
That's a valid argument but Ive addressed it before. The number of times I see the other guys exact cards is very high. I will estimate its 80% of the time.
If he wins, he has to show
If he shoves and I call his all in he has to show (like the 22 vs 85s hand I just posted)
Lots of people show when they dont have to especially if they get outdrawn, they had an overpair (lower than mine), set over set, pair and draw hands, straight flush draws...ect. They love to show their cards to show people they had a real hand.
So like I said, I estimate that I see their exact cards 80% of the time. Sometimes they say "I missed" when theres a FD on the flop and they muck. Sometimes they say "I knew you had me outkicked" on a Axx flop.
Those hands I can easily estimate the number of outs that they had. Now as you said, they could have a back door FD as well, so I always round up in their favor.
If I had AcQc and got all in on a As8d5h flop and he say "damn, you outkicked me!"...I give him credit for AJ which is about 14% equity. If he had AdJd he had about 18% so I give him 16%. Im only estimating equity 20-25% of the time since i know his cards the other times so I really doubt its going to throw off my calculations that far. Sometimes I give him a bit too much equity and sometimes I give him a bit too little.
In your example, a lot depends on the action. Did he raise preflop? Was it limped? That will narrow down his range considerably and give me a good idea what he had. If hes a TAG and he raised preflop and was willing to get all in on this flop he probably either had an overpair, or something like AsQs.
KsKh has 32% equity (I gave him backdoor FD)
AsQs has 35% equity.
So if he is a TAG and was the preflop raiser, I give him 33-34% equity. I always round to the nearest $5 anyway so I think its close enough.
A LAG could have T8s or QJs...something like that. 49% or 35%. I would probably give him 40%.
I understand your point that my math can never be perfect but I think its pretty close over all. I mean unless the 20-25% of the times I dont see villain cards, I underestimate his equity every time and never overestimate it, its going to even out over time anyway.
Maybe Ill keep track of the next 100 all ins to see how many times I see the cards and which ones I have to estimate equity.