PDA

View Full Version : Starting hand selection in LO8


RoundTower
12-07-2006, 09:11 PM
OK I wasn't going to start a thread on this topic, but this makes more sense to reply to what Buzz wrote in the "grade the December magazine" thread.

[ QUOTE ]
[ QUOTE ]
Obviously a fair bit of research has gone into this article.

[/ QUOTE ]Yes. [ QUOTE ]
But I'm suspicious of "point count systems", etc, as a way to govern your starting hand selection,

[/ QUOTE ]If anyone really wanted to use a "point count system," I'd advise them to use Hutchison's system.

I tried to come up with a nitty gritty way to quickly select hands with which one should probably be seeing the flop for the December issue. Seems to me where people who are new to limit-Omaha-8 stumble most is with regard to what starting hands to play.

What is presented in the article is a simple three step mechanism to quickly evaluate the playability of a starting hand.<ul type="square">
1. flush value
2. high combo value
3. low combo value
4. And then you also consider position.[/list]You're "suspicious"?

You can easily alleviate your suspicion by trying the system for yourself. See if it works for you or not.

Try this: Deal out nine or ten four card Omaha-8 hands and then quickly evaluate each as described in the article (without regard to position) for<ul type="square">1. flush value
2. high combo value
3. low combo value.[/list]About one out of every four hands, on the average, will add up to a total of five or more points. Put the hands the system considers "playable" to one side.

Then deal out a five card board and see which hands of the nine or ten dealt would end up as winners for high, low, or both (scoop).

Do this a hundred times, keeping track of how often the 5+ hands end up as winners in each category (high, low, scoop) and how often the other hands end up as winners in each category. That process should at least remove your suspicion and will not cost you any money in the bargain. You'll see for yourself whether the system is a good predictor of success or not.

But remember, if you decide to use the starting hand selection system in a real game, you still have to play good poker with regard to other decisions. I advise you (or anyone) to read or re-read Ray Zee's classic. Success playing the game involves much more than just good starting hand selection.

I remember the first time I sat down in a casino Omaha-8 ring game. I didn't know which starting hands to play and which ones to fold. As a result, I played too many hands and lost. It was obvious to me at the time that I was seeing the flop with more hands than my opponents but it was not clear which ones should be folded until I saw the flop.

[ QUOTE ]
and I don't think the article has much practical value.

[/ QUOTE ]That's ironic. I actually took your criticism from last month to heart and tried to write something for December that had very much practical value.

Buzz

[/ QUOTE ]

First I should note that I'm not an expert at all in this game, I rarely play it and haven't consistently beaten any level above 5-10 or so. So don't take anything I say as gospel.

The system has been developed by running simulations based largely on your hand's equity all in preflop. This would be great to answer the question "my opponents all move all in blind, what do I need to call?" but not so great to answer "three guys limp to me in the CO, what hands are profitable to limp?" which are the practical questions you have to answer.

To some extent you acknowledge this, but even based on what you wrote in this post (deal out a load of hands and see how often the high-scoring hands win). But more important is which hands win more money in game situations, I don't believe this is accurately modelled by all-in simulations.

Also, some of the point count scores seem arbitrary or just wrong. For example A/images/graemlins/heart.gif 4 /images/graemlins/spade.gif K /images/graemlins/heart.gif K /images/graemlins/diamond.gif outscores A/images/graemlins/heart.gif 2 /images/graemlins/heart.gif J /images/graemlins/heart.gif J /images/graemlins/spade.gif, I would normally prefer the latter.

Finally, just because I said I'm suspicious of point count systems in general doesn't mean they aren't useful. I'm also suspicious of HUDs, one-party government, and people who wear headphones at the table.

Buzz
12-08-2006, 11:04 AM
[ QUOTE ]
First I should note that I'm not an expert at all in this game, I rarely play it …

[/ QUOTE ]Round Tower - You’re actually the kind of person for whom I wrote the article.

[ QUOTE ]
The system has been developed by running simulations based largely on your hand's equity all in preflop.

[/ QUOTE ]It might seem that way to you because of the way I provided justification for my findings. However, your presumption is not true. I did use simulations of this type (and other types). But I also used calculations and reasoning. And I play the game against real opponents. Limit-Omaha-8 is the game I play when I sit down in a poker room.

[ QUOTE ]
This would be great to answer the question "my opponents all move all in blind, what do I need to call?" but not so great to answer "three guys limp to me in the CO, what hands are profitable to limp?" which are the practical questions you have to answer.

[/ QUOTE ] I “have to answer”?? /images/graemlins/tongue.gif

However, let me try to answer that question for you. In the absence of other knowledge about your opponents, and assuming you know how to play poker reasonably well, I think you probably can successfully play hands that total five points or more in a normal, full casino limit-Omaha-8 ring game. (That was the point of presenting the system and some of the rationale behind it).

[ QUOTE ]
But more important is which hands win more money in game situations,

[/ QUOTE ] Off the top of my head, I’d say hands you can bet that scoop have the best chance to win money.

[ QUOTE ]
I don't believe this is accurately modelled by all-in simulations.

[/ QUOTE ]Probably not.

[ QUOTE ]
Also, some of the point count scores seem arbitrary or just wrong. For example Ah 4s Kh Kd outscores Ah 2h Jh Jd,

[/ QUOTE ] The intent of the article is to identify playable hands. Which hand is the better of these two is moot, since the system identifies both hands as playable.

However, I think you are mistaken about which hand outscores the other. I have the former rated at seven points while I rate the latter as worth eight points.<ul type="square">Ah,4s,Kh,Kd:
1. flush = 2 (not 3, because you collect more when an opponent has a suited king, but here you have it yourself),
2. high combos = 3 (from 2 for king pair + 1 for AK combo)
3. low combos = 2 (for the A4 combo)
2+3+2=7[/list]<ul type="square">Ah2hJhJd:
1. flush = 2,
2. high combo = 2 (from 1 for jack pair + 1 for AJ combo)
3. low combo = 4 (for A2 combo)
2+2+4=8

My tally is:
7 points for Ah,4s,Kh,Kd and
8 points for Ah,2h,Jh,Jd.

See it?[/list]That you evidently made a mistake counting to seven or eight while going through the three simple steps bothers me. I tried to come up with a mechanism so simple that nobody could screw it up, and then you went and screwed it up.

Oh well. It’s not a big deal in one way because you’re right about the points being somewhat arbitrary and because you end up with enough points so that you should be playing both hands anyhow.

[ QUOTE ]
I would normally prefer the latter.

[/ QUOTE ]Me too. It’s worth more points.

However, which is preferred is moot because Hero almost surely should see the flop with both of those hands. Indeed, if Hero has trouble successfully playing either of these hands, then Hero is destined for a rocky ride playing Omaha-8. Neither hand is what I would consider a “premium” hand, but both are solid starting hands for anyone reasonably skilled in playing limit Omaha-8.

In terms of which wins more money, it’s hard to say. I think it depends more on interrelationships involved with your opponents than on the particular cards you hold.

As simulated in a non-folding simulation against eight random hands,
____________________high___low___scoop___total
Hero with Ah2hJhJd____265___923___888___2076
Hero with Ah4sKhKd___372___529___1000___1901

As simulated in a non-folding simulation against four random hands,
____________________high___low___scoop___total
Hero with Ah2hJhJd____377___1099___1519___2995
Hero with Ah4sKhKd___526___767___1812___3105

As simulated for C. Chan against eight tight opponents with random hands,
___________no call___high___low___scoop___net dollars
Hero with Ah2hJhJd____2534___556___683___1478___+$117K
Hero with Ah4sKhKd___2883___823___399___1554___+$106K

As simulated for C. Chan against four tight opponents with random hands,
___________no call___high___low___scoop___net dollars
Hero with Ah2hJhJd____4805___421___524___1167___+$101K
Hero with Ah4sKhKd___5180___603___311___1248___+$106K

As simulated with C. Chan against four loose opponents with random hands,
___________no call___high___low___scoop___net dollars
Hero with Ah2hJhJd____613___431___928___1725___+$217K
Hero with Ah4sKhKd___790___597___636___2125___+$219K

As simulated with Mz. Marple against the same four loose opponents with random hands,
___________no call___high___low___scoop___net dollars
Hero with Ah2hJhJd____483___411___938___1699___+$220K
Hero with Ah4sKhKd___712___577___631___2059___+$218K

O.K. That’s some dollar info from simulations for you. Maybe that will help you to see that the two hands are really pretty close in terms of earning potential. Those simulations are all just 10,000 run simulations. I could re-run them again as 100,000 run simulations or 1,000,000 run simulations, and the numbers would probably be a bit different. But I think the above should be enough for you to get the general idea. How much money Hero earns with a particular hand very much depends on how Hero’s opponents play.

I think a competent player should play both of these starting hands, against a full table or short handed, and against loose or tight opponents. A competent player should expect to make money with both hands (and probably with any hand worth five points or more) and in all the circumstances shown.

[ QUOTE ]
Finally, just because I said I'm suspicious of point count systems in general doesn't mean they aren't useful.

[/ QUOTE ]Yes. I know that. But I’d still like you to come to truly appreciate the simplicity and utility of the mechanism presented in the article for evaluating the playability of limit-Omaha-8 starting hands.

Buzz

Borknagar
12-08-2006, 12:02 PM
Buzz, I love your Omaha hi/lo articles, and hope you will continue writing more. That's all I wanted to say!

RoundTower
12-08-2006, 02:13 PM
[ QUOTE ]

However, I think you are mistaken about which hand outscores the other. I have the former rated at seven points while I rate the latter as worth eight points.<ul type="square">Ah,4s,Kh,Kd:
1. flush = 2 (not 3, because you collect more when an opponent has a suited king, but here you have it yourself),
2. high combos = 3 (from 2 for king pair + 1 for AK combo)
3. low combos = 2 (for the A4 combo)
2+3+2=7[/list]<ul type="square">Ah2hJhJd:
1. flush = 2,
2. high combo = 2 (from 1 for jack pair + 1 for AJ combo)
3. low combo = 4 (for A2 combo)
2+2+4=8

My tally is:
7 points for Ah,4s,Kh,Kd and
8 points for Ah,2h,Jh,Jd.

See it?[/list]That you evidently made a mistake counting to seven or eight while going through the three simple steps bothers me. I tried to come up with a mechanism so simple that nobody could screw it up, and then you went and screwed it up.

[/ QUOTE ]
OK - I had missed the bit about subtracting a point when you have AKs in your hand (it wasn't in your bullet points) and also I had given the second hand only 1 point for AJJ as per

[ QUOTE ]
"But if the hand has an ace with a high pair, for example AJJT, don’t add one point for AJ plus another for JJ."

[/ QUOTE ]

So maybe the system is trickier than you think. Anyway I was only trying to illustrate the point that having A4 instead of A2 subtracts 2 points from your hand value, yet 1 point is the difference due to having one extra flush blocker, or having QQ instead of KK. This seems counterintuitive, for example I much prefer A2xx to A3xx but I don't care much whether I have QQxx or KKxx other things being equal.

Also, I'm really not familiar with the Wilson software, so I can't assess how useful/realistic it is to simulate a hand with different characters and different opponents.

Buzz
12-09-2006, 01:39 AM
[ QUOTE ]
So maybe the system is trickier than you think.

[/ QUOTE ]RoundTower - Touche. Maybe it is. It was my goal to come up with a simple mechanism people could easily use to choose hands with which to at least generally see the flop. But in order to simplify the approximation process, I (knowingly) decreased the accuracy.

The system started out including fractional points. Then it used half points. And the early versions involved subtracting for middle cards in the hand. Thus it evolved into what finally got published.

As the system was developing, I’d go out and play it against real opponents, then go home and spend hours dealing out cards, running various simulations using different numbers of opponents and different Wilson opponent types, and thinking about how to better play and rate various hands. Poor Bryan (the editor)! I kept sending him updated versions as I honed the system for publication. It must have been a real pain in the neck (or elsewhere) for him.

[ QUOTE ]
Anyway I was only trying to illustrate the point that having A4 instead of A2 subtracts 2 points from your hand value,

[/ QUOTE ] You may be trying to make the article into something it never was intended to be. If so, the article probably doesn’t do that very well.

The intent never was to identify which starting hand of two starting hands is better than the other. The intent was merely to differentiate between hands that should probably be folded and hands that should probably be played on the first betting round.

[ QUOTE ]
yet 1 point is the difference due to having one extra flush blocker, or having QQ instead of KK.

[/ QUOTE ]The choices were somewhat arbitrary approximations. I’d tried to make the choices in such a way as to have Hero voluntarily playing between the top fourth and the top fifth (in terms of earning potential) of the hands dealt.

One point for QQ and two points for KK may make it seem as though KK is twice as valuable as QQ, and that clearly is not the case. We’re sacrificing some accuracy for simplicity.

Again with flushes, we’re sacrificing accuracy for simplicity. Comparing two cards in the flush suit to three, 3:2.25 would have been a more correct point ratio than 3:2. But 2.25 is not as simple as 2. Keeping accuracy and using whole numbers would put the correct ratio at 4:3 but making the nut flush draw worth 4 points when AA is only worth 3 points would be overemphasizing the importance of a nut flush draw before the flop.

In a way, I overemphasized flush possibilities anyway. Three points for the nut flush draw before the flop is probably too much in terms of how often a particular pre-flop flush draw turns into a winner on the river. And one point for baby flushes is probably too much. However, high flushes are the hands that often collect for you big time in a game. And back-door baby flushes have a way of turning what would otherwise be half of the pot into a scooper.

At any rate, money earning potential definitely was very much of a consideration in developing the system. I am confident that hands worth five points or more have, in general, a better earning potential than hands worth less than five points.

Exactly how much you average winning over the long term with any hand, I think, depends more on how your opponents play than on the potential of your starting hand. If that fact wasn’t already patently obvious to you, hopefully you are able to see from the simulation data presented in my last response to you that the money earning potential for a starting hand is very dependent on the nature of your opponents.

[ QUOTE ]
I much prefer A2xx to A3xx….

[/ QUOTE ]Good choice. Me too. There are not as many xx combos I’ll play with A3xx as with A2XX.

[ QUOTE ]
… but I don't care much whether I have QQxx or KKxx other things being equal.

[/ QUOTE ]Regular Texas hold ‘em players as a group may tend to over value a pair of queens in Omaha-8. Queens simply don’t stand up much on their own in Omaha-8. They need to improve, but they’re unlikely to do so. When you have a starting hand that contains a queen, you’ll only see a queen on the flop about one time out of eight. The other seven times out of eight you’ll have a couple of places in your hand taken up by the queens, thus decreasing the number of two card combinations that can find a match with the flop. That’s noted in the two-card combination article you didn’t think was practical last month.

[ QUOTE ]
Also, I'm really not familiar with the Wilson software, so I can't assess how useful/realistic it is to simulate a hand with different characters and different opponents.

[/ QUOTE ]Wilson provides about fifty different characters, all with different playing characteristics. Any of the characters could be modified in order to more closely match the playing characteristics of a particular real life opponent. I made one such modification, just to make sure I could do it, but the characteristics pre-programmed into the Wilson characters are probably more objective and realistic than I could come up with on my own. Some of them are quite tough to play against.

Buzz

Buzz
12-09-2006, 01:41 AM
Borknager - Thanks.

Buzz

bozzer
12-11-2006, 02:34 PM
Just wanted to say that as someone just taking first steps into O8, I loved the articles and am using the point system.

What adjustments should I make for PLO8? More points for made hands presumably, but any idea of the scaling?

Buzz
12-19-2006, 09:40 PM
[ QUOTE ]
Just wanted to say that as someone just taking first steps into O8, I loved the articles and am using the point system.

[/ QUOTE ]Bozzer - Thanks. I hope it works well for you. I think it will solve your starting hand problems.

[ QUOTE ]
What adjustments should I make for PLO8? More points for made hands presumably, but any idea of the scaling?

[/ QUOTE ]Sorry, I can't help you. From my perspective PLO8 is a completely different game from limit-O8.

Five point and better hands in the system I've presented represent roughly the top quarter of Omaha-8 starting hands. Assuming you play poker well, I think you usually can do fine in a typical B&amp;M limit ring game, perhaps with small adjustments as you become more familiar with the particular group of opponents you are facing.

But what hands to play and how best to play them in a pot limit Omaha-8 game depends very much on the particular group of opponents you are facing. At any rate, that's my take on it.

Buzz