Help me understand my Score Differential!

[Mshcah]

I thought I understood how the Score Differential is calculated, but now I'm not so sure!. I have played several rounds on the same course, off the same tees, and each with the same PCC value. I expected identical Adjusted Gross Scores to produce identical Score Differentials. But not so according to the EG app. Not only do identical AGSs sometimes result in different SDs, but higher AGSs sometimes result in lower SDs. Please can someone explain what am missing?

 

[peld]

odd. ive got identical adjusted scores showing as the same differentials. definitely no adjustments ?

 

[nickjdavis]

can you provide a screenshot (with any personal details edited out) so we can see what you are seeing?

 

[rulefan]

I thought I understood how the Score Differential is calculated, but now I'm not so sure!. I have played several rounds on the same course, off the same tees, and each with the same PCC value. I expected identical Adjusted Gross Scores to produce identical Score Differentials. But not so according to the EG app. Not only do identical AGSs sometimes result in different SDs, but higher AGSs sometimes result in lower SDs. Please can someone explain what am missing?

When you say 'course' do you actually mean 'tees'?

 

[Mshcah]

I'm attaching a snip from a screen that shows just one minor example. All rounds played on the same course off yellow tees. In the most recent round the AGS is 93 and the SD i 25.0. In the last row the AGS is 95 and the SD is 24.9. All other details are the same.

 

[peld]

you have different adjusted gross scores.
Read this.....
http://golf.okrasa.eu/handicap-en/whs-en/score-differential/

 

[rulefan]

I'm attaching a snip from a screen that shows just one minor example. All rounds played on the same course off yellow tees. In the most recent round the AGS is 93 and the SD i 25.0. In the last row the AGS is 95 and the SD is 24.9. All other details are the same.

Have you checked on the WHS portal?

 

[Bdill93]

I'm attaching a snip from a screen that shows just one minor example. All rounds played on the same course off yellow tees. In the most recent round the AGS is 93 and the SD i 25.0. In the last row the AGS is 95 and the SD is 24.9. All other details are the same.

Have you had any high scores that have been adjusted to nett double bogey?

 

[Mshcah]

you have different adjusted gross scores.
Read this.....
http://golf.okrasa.eu/handicap-en/whs-en/score-differential/

Thanks for replying. Yes, the AGSs are different, 93 and 95. But the higher AGS gives rise to a lower SD. Shouldn't it be the reverse? The reference you have cited donesnt explain that to me

 

[rulefan]

you have different adjusted gross scores.
Read this.....
http://golf.okrasa.eu/handicap-en/whs-en/score-differential/

That calculator and the formula produces different SDs to the Snip.jpg in post #5

 

[YandaB]

That calculator and the formula produces different SDs to the Snip.jpg in post #5

Yes they are different by exactly 2. Could it be that there is an exceptional score adjustment which ran out on the last 93?

 

[Mshcah]

Have you had any high scores that have been adjusted to nett double bogey?

Have you had any high scores that have been adjusted to nett double bogey?

Yes, there was one nett double bogey adjustment in each round - which is reflected in the AGSs

 

[Mshcah]

you have different adjusted gross scores.
Read this.....
http://golf.okrasa.eu/handicap-en/whs-en/score-differential/

Thanks for replying. Yes, the AGSs are different, 93 and 95. But the higher AGS gives rise to a lower SD. Shouldn't it be the reverse? The reference you have cited doesnt seem to answer that question.

Have you checked on the WHS portal?

I have looked at CONGU WHS and other documents for an explanation but found nothing so far. I guess from all the comments that others have not experienced this apparent anomaly.

 

[peld]

i think you need to speak to your hcp secretary - there must be adjustments.
If i calculate them using the formula (Adj Score - rating) x (113/slope) then i get the following.

dont trust that there isnt a PCC just because it says zero!

 

[rulefan]

Have you had any high scores that have been adjusted to nett double bogey?

A score of 101 would suggest that is the case.

 

[Bdill93]

i think you need to speak to your hcp secretary - there must be adjustments.
If i calculate them using the formula (Adj Score - rating) x (113/slope) then i get the following.

dont trust that there isnt a PCC just because it says zero!

View attachment 38735

Have all 5 rounds been played recently? Any historic? - Just spitballing ideas here!

 

[Mshcah]

Yes they are different by exactly 2. Could it be that there is an exceptional score adjustment which ran out on the last 93?

TBH I'm not sure how to check that. But by definition I dont have many exceptional scores and there are other instances of this anomaly occurring. For example, I have two rounds with an AGS of 97. One gets an SD of 26.9 and the other 28.9. Again, on the same course, off yellow tees, with PCC=0. There were no exceptional scores in the weeks before either round.

 

[Mshcah]

Have all 5 rounds been played recently? Any historic? - Just spitballing ideas here!

Yes, all rounds in the snip played in the past one month.
The PCC value is what's on the EG database, so presumably that's been used in generation of the SD. But I will talk to the club rep!

 

[YandaB]

For it to be a -2 reduction you would have shot a round that is 10 better than HI but that will last for 20 rounds so will have dropped off your latest 20.

 

[wjemather]

I'm attaching a snip from a screen that shows just one minor example. All rounds played on the same course off yellow tees. In the most recent round the AGS is 93 and the SD i 25.0. In the last row the AGS is 95 and the SD is 24.9. All other details are the same.

Your adjusted gross of 82 would trigger an exceptional scoring reduction of 2, which has been applied to all the earlier differentials, hence the apparent discrepancy.