Preflop frequencies

How often the solve actually opens, by seat

The common way to answer this is to average the opening-chart widths. That is wrong, and it is wrong in a predictable direction: you only open from the button on the hands where four seats folded in front of you. Reach-weighting fixes it, and the correction is exact.

17.2%of hands dealt are opened from UTG at 100bb
47.4%button open width when it is folded to the button
45.5%of hands actually reach the button unopened
14.0%floor on preflop raise frequency from opens alone

20bb

Opening frequency by seat at 20 big blinds, 6-max PLO
SeatOpens when first inReaches this seat unopenedOpens per hand dealt
UTG12.8%100.0%12.8%
HJ15.2%87.2%13.3%
CO19.1%73.9%14.1%
BTN26.2%59.8%15.7%
SB30.5%(+26.3% limp)44.1%13.5%
Per orbit--11.6%

30bb

Opening frequency by seat at 30 big blinds, 6-max PLO
SeatOpens when first inReaches this seat unopenedOpens per hand dealt
UTG13.8%100.0%13.8%
HJ16.4%86.2%14.2%
CO20.4%72.1%14.7%
BTN27.4%57.3%15.7%
SB28.0%(+26.7% limp)41.6%11.7%
Per orbit--11.7%

50bb

Opening frequency by seat at 50 big blinds, 6-max PLO
SeatOpens when first inReaches this seat unopenedOpens per hand dealt
UTG16.4%100.0%16.4%
HJ19.9%83.6%16.6%
CO25.1%66.9%16.8%
BTN35.3%50.1%17.7%
SB30.1%(+17.8% limp)32.4%9.8%
Per orbit--12.9%

100bb

Opening frequency by seat at 100 big blinds, 6-max PLO
SeatOpens when first inReaches this seat unopenedOpens per hand dealt
UTG17.2%100.0%17.2%
HJ21.9%82.8%18.1%
CO29.8%64.7%19.3%
BTN47.4%45.5%21.5%
SB31.9%(+10.9% limp)23.9%7.6%
Per orbit--14.0%

150bb

Opening frequency by seat at 150 big blinds, 6-max PLO
SeatOpens when first inReaches this seat unopenedOpens per hand dealt
UTG16.2%100.0%16.2%
HJ21.1%83.8%17.7%
CO30.0%66.1%19.8%
BTN51.8%46.3%24.0%
SB29.3%(+11.0% limp)22.3%6.5%
Per orbit--14.0%

How the reach column is computed

First in, a seat either opens or folds. So the chance the action arrives at a seat with nobody having entered is the product of one minus the opening width of every seat before it. At 100bb the button opens 47.4% of hands when it gets the chance, but it only gets the chance 45.5% of the time, so it opens 21.5% of all hands dealt. Averaging the widths would have told you 29.6%, which is not a frequency of anything.

What this is not

This counts open-raises. It is a floor on preflop raise frequency, not the whole of it - 3-bets, squeezes and raises over limpers all count as raises in a tracker and none of them are here. It also says nothing about VPIP, which needs the calling and defending trees. We have not aggregated those, and rather than estimate them we have left them out.

To put your own numbers beside the solve, the Hand Tracker shows your actual opens next to these same solves, seat by seat, with your sample count beside each one. The full ranges behind every width here are free in the solver, and the method is on methodology.

Questions

Why is this lower than the PFR my tracker shows?
Because this counts open-raises only. A tracker counts every preflop raise, which also includes 3-bets, squeezes and raises over limpers. Treat the number here as the floor that the opening ranges alone account for, not a target for your whole PFR.
Why not just average the opening ranges?
Because you only open from the button on hands where the four seats in front of you folded. Averaging the chart widths treats every seat as if it always gets to act first, which inflates the late seats. The reach column is the correction, and it is exact rather than estimated.
Does the big blind open?
No. If everyone folds to the big blind the hand is over - that is a walk, not an open. The big blind therefore contributes nothing to open frequency, which is why the orbit figure divides by six seats but sums over five.
Which solve are these from?
The 6-max PLO cash solves at 20, 30, 50, 100, 150 big blinds. Each depth is a separate solve with its own rake assumption, which is why the widths move with depth rather than scaling smoothly.