Website:https://holdemranges.com/omaha.html
Pricing: 50 €
Contacts: support@holdemranges.com

oRanges Omaha Calculator
is a hand range, equity calculation tool which was developed to help Omaha poker players better to understand how frequently range hits specific hands and allows you to calculate the probability of starting hand range to fit a given board, conveniently show opponents ranges and build your own ranges to significantly increase your skill ...

A user-friendly interface will help you to understand the structure of players' ranges and calculate equity. Equity is calculated both using the Monte Carlo method and by brute force complete enumaration at the user's choice.

There are built-in expression parsers to help you create and filter input ranges, as well as create custom statistics based on the default statistics. There is an ability to enable or disable hands that fall within certain statistics to fully analyze the narrowing of ranges by street and much more.

Good job!

I like the User Statistics and a decent set of default statistics.

I compared the full enumeration mode with propoker exhaustive mode.
It's amazing, but it looks like you have several thousand times faster!!!

Are you going to add Omaha Lo options to the program?

Thanks for the feedback.

I did not compare the calculation time with propoker.
Perhaps this is because direct enumeration is used in propoker, but I developed my own algorithm.
I will check it out.

I will most likely add Omaha Low option in future releases.

License can be deactivated, in case I need to format or move to another PC?

Sure. Just write email to support. I am trying to deactivate it as soon as possible.

Hello Peleg,

How did you determine the rankings for "Distinct Rank"? I noticed that AATT double suited is rank 1/16432, while AAKK double suited is rank 6/16432, even though equity for AAKK is higher.

Thanks,
zbad

Hello zbad,

The rank is determined by descending equity value against 100% range, i.e.
AcAdTcTd vs 100% approximately 71.54 - rank 1 - distinct rank 1
AcAdJcJd vs 100% approximately 71.02 - rank 7 - distinct rank 2
AcAdQcQd vs 100% approximately 70.92 - rank 13 - distinct rank 3
AcAd5c5d vs 100% approximately 70.82 - rank 19 - distinct rank 4
AcAd9c9d vs 100% approximately 71.71 - rank 25 - distinct rank 5
AcAdKcKd vs 100% approximately 70.67 - rank 31 - distinct rank 6

Due to the so-called suit isomorphism preflop, hands receiving rank from 1 to 6 from the group [AT][AT] have the same equity against 100% . The order in the group is set according to the suits order cdhs.

There are a total of 4 card hands of 270,725, and hands taking into account suit isomorphism a total of 16,432.
All hands from a unique group have the same distinct rank, which is simply increased by 1.
The lower the Distinct Rank, the greater the equity against the 100% range.

I see thanks for the explanation. One thing still isn't clear to me. Intuitively, it would seem that [AK][AK] would have a higher equity against a random hand than [AT][AT]. But when we run the equity we see that is not true (71.54% vs 70.67%). Is there any way to make sense of this in words? Beyond just performing the calculation to prove this is the case?

Thanks.

Obviously, this is a consequence of the fact that high ranking cards in an 4 cards Omaha hand contribute less to equity than in Hold'em.

Given the structure of the Omaha game, a significant contribution to equity comes from hands that have the potential to make a straight.
For example:
[AK][AK] hands will make a straight to the river in cases AKQJT and A2345. 2 cases.
[AT][AT] hands will make a straight to the river in cases AKQJT, KQJT9, QJT98, JT987, T9876, A2345. 6 cases!

The probability [AT][AT] hands will make a straight is much higher than [AK][AK] hands.

If you specify [AT][AT] and [AK][AK] in the program, we get the following result:



As you can see, values for oesd, gutshot, backdoor sd on the flop are higher [AT][AT] .

For [AK][AK], how does A2345 make a straight? You have to use two cards out of the 4 in your hand, do you not?
Same with [AT][AT]. How is KQJT9, QJT98, JT987, T9876, A2345 a straight? In these examples you are only using an A or a T by themselves. Do you not have to use two cards?

Of course, only 2 cards are used in Omaha.

The examples that I provided concerned only hold'em, but they can, it seems to me, provide an explanation why [AT][AT] has more equity against 100% than [AK][AK].

I'm guessing that higher ranked [AK][AK] cards will probably have higher equity than [AT][AT] in most cases.

Apparently, there is a group of hands in 100% range that contribute more to equity for [AT][AT], i.e. hands when [AK][AK] loses, not wins.

[AK][AK] hands leave significantly more hands with T in 100% range.
I suppose that hands with T, such as KT**, QT**, JT**, T9** etc, which have strong straight potential, provide exactly the equity contribution that makes [AT][AT] better than [AK][AK].

This is just a guess. I don't have an exact answer to this question.
It is necessary to make a research what combinations hands [AT][AT] and [AK][AK] win and lose on river against 100% and make a comparison.
Maybe I'll do this and post the result.

Yes, that seems to be the explanation that makes sense to me as well.

With [AK][AK], you unblock all T’s in your opponents range. Your opponent has more Ts, and and therefore has more two card combinations with a T in them that makes a straight, ie. KT making KQJT9, QT making KQJT9 but also QJT98, etc.

Yes it would be interesting to see the result, but I suspect that the number of straight combinations will be identical since both hands can only make a straight of AKQJT.

Will you have multiway calculations? not just heads up?

Yes, most likely in the next release.

Thanks. When is it planned?

I hope to release in January. May be on the next week, not sure though.

A new version of the application is available for download:
oRanges Omaha Calculator 1.0.0.7

* General performance improvements
* Import/Export ranges (including Monker Solver format)
* Multiway Equity Calculator
* Multiway Next Card Equity Tool
* Some minor improvements and bug fixes

Hey, thanks for the update.

Any plans to add 3-way range vs range?

There are no such plans for the near future.

Calculating a 3-way even in regular hold'em is a heavy loaded task. The algorithms I'm using in Omaha at the moment are not fast enough for this task.

what are the advantages of your software over pro pokertools?

— In-depth Range Exploration, Range analysis, Range building.

— Built-in user statistics expression parser to create custom statistics based on the default statistics.

— Range filtering by range pattern and by predefined and custom statistics.

— Fast Equity calculation by complete enumaration (very fast on the turn and river)

— Import/Export ranges in text format. Monker Solver format is recognized


In simple words, this program is something like flopzilla for 4-card Omaha.

A new version of the application is available for download:
oRanges Omaha Calculator 1.0.0.8


* Transition to 64bit application
* General performance improvements
* Statistics in Multiway Equity Calculator
* Some minor improvements and bug fixes

is it possible to implement plomastermind syntax in your software? should be super easy, i would buy it if you do, thank you

I'll think about what can be done, but I'm not sure that it will be possible to completely repeat the PPT syntax.

Its not about repeating the ppt syntax, is about been able to write the syntax in a more intuitive way. Let me know if you want i can contact you via email and share my thoughts