Overview of Equity Models in SitNGo Wizard 2

Date: 2014-07-29
Author: Jason Glatzer

As we reported, SitNGo Wizard 2 recently added a new equity model, the Ben Roberts model.  With this model, there are now three to choose from: chip count, ICM, and Ben Roberts.  All three models will give you different advice on how you played a sit and go, especially in the later stages of the game where it is mostly push or fold scenarios.  The models can also be utilized for the later stages of multi-table tournaments.
The chip count model is the most basic and the least accurate of the three for deep stage final table play since it does not take into amount of equity each chip is worth at that stage of the tournament.  Instead, the analysis is purely done based off chip count.
The chip count model is not without merits, however.  If the game is push or fold in the middle of a tournament, ICM may not yet be important.  Therefore, the chip count model is the best since it is your job to make the best moves to accumulate chips since you are not yet worried about payouts.
Until recently, the ICM equity model has been the go-to model when analyzing your late game play in a tournament or any push-fold situation in a single-table sit and go.  This model calculates the expected value of what your expected payout would be on your future chip stack whether you decide to push or fold.
Basically, hands that might be correct shoves in the chip equity model might be correct folds in the ICM equity model since in some cases losing chips might be more valuable than gaining chips.  The opposite may hold true too, especially if you are the chip leader.
Until recently, there was only the Mason-Harville ICM equity model, which has pretty much the standard that most sit and go players swear by.  This doesn't necessarily mean it is the best model; it just means it is the most popular.
There are other ICM equity models that have been developed over time, including one by Ben Roberts.  I am not enough of a statistics expert to know whether this model is more accurate than the Mason-Harville model, but do believe it is positive that another model has been introduced, giving SitNGo Wizard 2 aficionados a different way to analyze their game.
Roberts said of his model, "I present a new algorithm to approximate ICM equities, which through testing has consistently proven to be more accurate than the Malmuth-Harville algorithm, as well as being computationally inexpensive.”
Roberts went on to state his model calculates calculations quicker in larger sized player pools: "Furthermore, my new algorithm can be adapted to perform a quick approximation of equities in large player pools, which the MH algorithm cannot do in reasonable time."
Just about any online poker player would need an ICM calculator to figure out whether a move they made was +EV in the later stages of the tournament.  Very few people can understand how to make these calculations without an ICM calculator handy.  And now SitNGo Wizard has more than one ICM equity model to choose from for calculating equity when ICM is a determining factor to help players analyze whether a certain hand in a certain position with certain effective blinds is a shove or a fold during late game shorter stack play.

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