Utilizing Range Advantages

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Utilizing Range Advantages

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Sam Greenwood

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Utilizing Range Advantages

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Sam Greenwood

POSTED Nov 09, 2013

Sam outlines how the strength of your range versus your opponent's range can help you put pressure on your opponents.

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BCRUNGOOD 11 years, 4 months ago

You had your pre-flop defending range up in Poker Odds Oracle.  How do you go about constructing your defending range against both tight and wide ranges when antes are in play getting 4.4:1 usually?

yoren 11 years, 4 months ago

I have us gaining about 4bbs in EV by turning our hand into a bluff under reasonable assumptions.

Assuming if we check, and he never bluffs us off our hand, our EV of checking is 22% (see 45:36) of the 100k in the middle, or 22k.

If we 3/4 pot, and he calls only with straights+ which he has 33% of the time (slightly more b/c we block the non-straight portion of his river range, see 42:42), our EV is 0.67*100 - 0.33(75) = 42.3k

Seem right?

Sam Greenwood 11 years, 4 months ago

Yoren, that seems right. It's possible he'll call w/ a set, it's also possible river checks through and we win or he bluffs off a better hand, but given your parameters I think that's a good estimate. Also note that we can win more w/ our straights and flushes this way.

Daz 11 years, 4 months ago

When a good player does raise in a spot where he is meant to have few combos, is it always to induce, begin a leveling war? what are some of the thought processes going on here?

I'm thinking of Phil ivey's hand 99 versus Jason Mercier's A4s when Jason squeezes then cbet/shoves over Ivey's rather large flop raise. (High Stakes Poker) Video of the hand below:

 http://www.youtube.com/watch?v=9KOnekXukWE 

Phil Galfond used the same knowledge to shove over Phil Laak's raise in a later season of High Stakes with a low pair.  


Juan Copani 11 years, 4 months ago

I really enjoy this kind of analysis. It´s intresting that theoretically we need a MDF for the cases when we check the river and he bets. But can we forget about MDF if we constructed a leading range basing our decision in opponents never bluffing the river ?? Would be such a desaster xF close to 90% on the river for example  ?? To call with TT we need opponent going crazy with hands like ATo, which it´s so difficult to happend in practice. 


Sam Greenwood 11 years, 4 months ago

BCRUNGOOD,

Creating a defense range here is really tough. We are getting a good enough price that every hand has enough raw preflop equity to call, but obviously we can't realize 100% of our equity. It should be a function of your raw preflop equity, which is a function of villain's opening range and a function of how much of your equity you think you can realize, which depends on your ability to play postflop and your opponents ability to play postflop.

 Versus a very loose passive player who you can realize a lot of preflop equity vs. a hand like k7o could be a defend and is probably a better defend than 54s. Versus someone good who might barrel more often you might want to defend a hand like 68s that can make two pair plus more often than k7o. My defense range in the video is a quick estimate and is mainly used to illustrate the fact that my great pot odds give me a weaker preflop range than the villian.

Sam Greenwood 11 years, 4 months ago

juan,

That's what's so difficult about constructing a range here. We want to be able to bluff, vbet and still not be susceptible to getting bluffed ourselves. I think in practice UTG doesn't bluff enough here and  don't vbet AA/KK. When they bluff they tend to bet smaller which makes calling with a hand like TT a little more attractive and maybe the best adjustment to make vs. people's actual tendencies.

In theory you should construct two robust strategies, but that the problem is as you add more straights your checking range, you need to take away more bluff leads, which adds more hands to our c/f range, which makes us want to add more straights and so forth. Another thing to consider when constructing our leading range is it's not as simple as making him indifferent between calling with bluffcatchers because he might not always have a bluffcatcher strong enough to call with. 

Quadchrazs 10 years, 4 months ago

Great video. Do you assume the EV of checking = always losing with the weaker parts of your range?

Sam Greenwood 10 years, 4 months ago

I made this video, awhile ago, so i'm not positive, but I think one of the constraints I made was my opponent would bluff hands w/ zero showdown and maybe bluff some of his weakest made hands. So checking gives us 0% of the pot or close to it.

Flight_Risk 4 years, 11 months ago

I'm still playing at the micros and I've been having a really hard time trying range my opponents during my hand reviews. This video is helping me a lot. I know it's a bit older but just seeing how someone else does it is great. Especially when it's The Great Sam Greenwood!

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