Calculating PFR by other values

[Sat01]

Hi all,

I'll try to be as clear as possible, although i don't speak eng very well.

Is it possible calculating the PFR stat based on the values reported in the "Popup Player Detail Window"?

For example, if i've PFR 13,6 and:

(Unopened, Limper(s), Raiser, 2+Raisers)
EP | 18 | - | - | - |
MP | 15 | 0 | 3 | - |
CO | 21 | 8 | 1 | 0 |
BU | 26 | 3 | 5 | 0 |
SB | 38 | 8 | 7 | 0 |
BB | - | 6 | 4 | 0 |

Based on values reported in this chart, how can i get 13,6?

I tried in this way:

average unopened PFR: 18 + 15 + 21 + 26 + 38 / 5 = 23,6
average limper(s) PFR: 8 + 3 + 8 + 6 / 5 = 5
average raiser PFR: 3 + 1 + 5 + 7 + 4 / 5 = 4
average 2+raiser PFR = 0

PFR = 23,6 + 5 + 4 + 0 / 4 = 8,15

The result i get is very different from the real... So, i think this isn't the exact formula or maybe this deviation is due an approximation error.

Any advice?

[Patvs]

PFR is based on how often you raise, out of all the opportunities you have to raise.


In the chart:
EP | 18 | - | - | - |
MP | 15 | 0 | 3 | - |
CO | 21 | 8 | 1 | 0 |
BU | 26 | 3 | 5 | 0 |
SB | 38 | 8 | 7 | 0 |
BB | - | 6 | 4 | 0 |
These are percentages how often you raise, but they're not based on the same sample size of hands.
As an example let's say you play 10 hands. You raise 5 of them. (so we already know your PFR will be 50%).
You raise 2x in early position (20%), 2x in middle position (20%), and 1x from the button (10%). You can now do:
20% + 20% + 10% = 50% (because they're all based on the same total of 10 hands played)

In your chart, the sample size of hands isn't automatically the same.
When a player 3bets allin with a big stack from the button, and you're still to act in the blinds, you don't have to opportunity to raise. As a result VPIP and PFR aren't even based on the same sample size anymore.



--


Nor can you do
PFR = 23,6 + 5 + 4 + 0 / 4 = 8,15

average unopened, average limper(s), average raiser, average 2+raiser are all based on different sample size of hands. You cannot add them up and divide by 4.

PFR in HoldemManager is calculated looking at how often you raise, out of all the opportunities you have to raise.

[Sat01]

Ok! Now everything is clearer. Thank you very much!

My question was related to the fact that PFR includes three types of raises: open raise + iso-raises + 3+bet.

Now, if i look the opponent’s pfr while playing, I’d like to find a way to understand the proportion (on average) of each of the three raises.
Basically, what are the percentages of OR/IR/3+B compared to the PFR? What are the approximate values?

For example: open raises range is probably 100%; raises on limpers may be top-30% of PFR and 3+bet may be the top-5% of PFR... So, if oppo has 10% as PFR, I know that his open range is 10%, his iso-raises range is 3% of PFR and his 3+bet range is 0,5% of PFR combos.

In my opinion, understanding this proportion would make PFR stat much more useful, but I cannot figure out how to calculate it.

[Patvs]

You can add: unopened preflop--> raise first to your HUD
(in HM2 it's called RFI: raise first in)
and add 3bet to your HUD.