Frozen Pool Accuracy???

[blayze]

So I'm looking at Mike Green's PP time over the past few games, trying to determine if I should start him this next week, and came across some inconsistencies.

According to official box score:
http://www.nhl.com/gamecenter/en/boxscore?id=2015020354

Green had 3:21 of PP time, and Kronwall 4:52

According to frozenpool:
http://dobberhockey.com/frozenpool_l...ations&sent=go

Green had 22.5% (12.5% + 5% +5%) of PP time, and Kronwall had 77.5% (70% + 5% + 2.5%)


Those numbers don't marry up. If Frozenpool is correct, Green should have less than 1/3rd of Kronwall's PP time. Can anyone explain this?

[Wrist_Shot]

Eric will know more about this than me, but I'm pretty sure that those percentages relate just to the fraction of total PP ice time each of these players were on the ice, solo or with the other players listed.

So, 70% of Kronwall's total PP time on ice that game was spent solo, 5% was spent with Green, and 2.5% with Kindl.

[blayze]

Eric will know more about this than me, but I'm pretty sure that those percentages relate just to the fraction of total PP ice time each of these players were on the ice, solo or with the other players listed.

So, 70% of Kronwall's total PP time on ice that game was spent solo, 5% was spent with Green, and 2.5% with Kindl.

Yes, I know.

But if you look at the totals, frozenpool suggests Kronwall was on the ice for 77.5% of the PP time and Green 22.5% (in other words, Kronwall should be getting more than triple Green's PP time).

If you look at the actual PP time from NHL.com, it suggests the gap is much less.

[Wrist_Shot]

I see what you're saying. Looking at it again, this can't be showing what I thought above (percentage of player's PP ice-time with other players). The percentages total to 100, so it must be showing line combos for total team PP ice-time.

If this is the case then the numbers do not jibe with NHL numbers like you said.

[Invictus]

Also Kronwall is spelt Kronvall on Frozen Pool...

[blayze]

Also Kronwall is spelt Kronvall on Frozen Pool...

That must be how it's pronounced in Swedish... frozen pool adds the accent

[blayze]

Nobody knows the answer to it?

I've always kind of looked up these things on frozenpool, assumed it was right and made decisions based on that data, but this has me wondering now...

[newfcollins]

I'm going to simply the percentages a little bit for my answer.

Say Detroit gets just one PP, and doesn't score. Kronwall plays a 10 second shift by himself. Green plays a 1:50 minute shift by himself. According to the numbers though, they each played one shift, so it would be 50 per cent for each.

Note, I have no idea if this is true or not, but it might explain the reasoning.

[gfhyde]

I'm going to simply the percentages a little bit for my answer.

Say Detroit gets just one PP, and doesn't score. Kronwall plays a 10 second shift by himself. Green plays a 1:50 minute shift by himself. According to the numbers though, they each played one shift, so it would be 50 per cent for each.

Note, I have no idea if this is true or not, but it might explain the reasoning.

This is exactly what I think. It's not amount of powerplay time, it's frequency of line combinations.

[Mr. Guru]

If it's like suggested above I hope someone would come out with a percentage of powerplay time instead

[ericdaoust]

I probably won't have time to look into this until tomorrow but I believe it is per shift. If you want percentage of total PP time you should check out the player's profile page under Game Log.

Mike Green
Niklas Kronwall

[Dobbernomics]

The top of the line combinations page states that "numbers represent on-ice line occurrences". This would suggest that the percentages are based on number of shifts, rather than time on ice.

If you click on Mike Green's profile though, you can see that he is listed as roughly 40% of PPTOI (03:21) for Nov 29, which does reflect correctly what you also see on the NHL game report.

[Edit] (Sorry Eric, didn't see your reply before I posted...)

[ericdaoust]

The top of the line combinations page states that "numbers represent on-ice line occurrences". This would suggest that the percentages are based on number of shifts, rather than time on ice.

If you click on Mike Green's profile though, you can see that he is listed as roughly 40% of PPTOI (03:21) for Nov 29, which does reflect correctly what you also see on the NHL game report.

[Edit] (Sorry Eric, didn't see your reply before I posted...)

Thanks for point out the line at the top of the page. Case closed!

[blayze]

Thanks guys that clarifies a lot.

If it's based on per SHIFT, then the PP data is a lot less useful to me, since 10 seconds on on the back-end of a PP is weighted as heavily as a full 1:30 shift on the front end. The "shift" methodology works over the course of a full game since there's a large sample set, but in a typical game where a team gets 2-3 PPs then it can be misleading. I guess I'll just have to roll up my sleeves a little and check individual boxscores for actual PP TOI.