# \$Ev

• Bronze
Joined: 30.08.2009
Hy all,

I have a problem when I want to calculate my \$EV.
I don't really know how to calculate the percentage of 1st, 2nd, 3rd position according to my stack.

• 8 replies
• Bronze
Joined: 04.12.2009

ICM Article
• Bronze
Joined: 30.08.2009
Yes I have.
I have found this: "So if Klaus has 3000 chips in a 10+1\$ SnG and takes places 1/2/3 with probabilities 15/17/20%"

But how can I get these probabilities?

e.g. If I have 4500 when we are 6 in the sng. (All chips are 15000)
What are my probabilities for 1/2/3?
• Bronze
Joined: 08.11.2008
i'd say that depends on your ROI
• Bronze
Joined: 04.12.2009
In the example given all opponents skill levels are presumed to be equal

so in a 10-man SNG tournament with 1500 starting chips and your stack is 4500 then your % of coming first is presumed at 4500/15000 (your stack/total chips) = 30%

To work out the other positions you need the sizes of the other stacks
• Bronze
Joined: 04.12.2009
If you want to see how it is actually worked out I did you an example using 3 players left with stack sizes 10k / 3k / 2k. You basically need to work out every possible outcome and then add the %'s up for each position

1ST - 10k - 66.7% 2ND - 3k - 60.0% - 66.7*60.0=40.0%
1ST - 10k - 66.7% 2ND - 2k - 40.0% - 66.7*40.0=26.7%

1ST - 3k - 20.0% 2ND - 10k - 83.3% - 20.0*83.3=16.7%
1ST - 3k - 20.0% 2ND - 2k - 16.7% - 20.0*16.7= 3.3%

1ST - 2k - 13.3% 2ND - 10k - 76.9% - 13.3*76.9=10.2%
1ST - 2k - 13.3% 2ND - 3k - 23.1% - 13.3*23.1= 3.1%

so 10k has 66.7% / 26.9% / 6.4%
and 3k has 20.0% / 43.1% / 36.9%
and 2k has 13.3% / 30.0% / 56.7%
• Bronze
Joined: 19.04.2008
There's an article about the ICM in the strategy section with examplary calculations

edit: but really don't calculate this yourself, there's software for those kind of things
• Bronze
Joined: 24.05.2008
It's often good to go through the calculations a few times now and then just to see that you know what you're actually doing and using all the time. I often find that increased understanding leads to better use of the tools.
• Bronze
Joined: 04.12.2009
Originally posted by z4tz
It's often good to go through the calculations a few times now and then just to see that you know what you're actually doing and using all the time. I often find that increased understanding leads to better use of the tools.
Agreed. It's all very well using fancy software to do these things for you, but on the occasions when you're playing live or using a new setup where these calculations aren't available to you it's good to know the theory behind the numbers