LizAig
Active member
As the title says we have two players high off 24 HI. They both have been given a CH of 24 but one has 95% PH of 23 and one of 22.
Why would two players off the exact same HI and CH have different PH?
- Thread starter LizAig
- Start date
D-S
Well-known member
Are their exact HIs 24.0?
LizAig
Active member
Yes - I’ve checked on WHSplatform and both are 24.0
The bizarre thing is now I’ve looked other players also have the wrong 95%. I don’t see how rounding can be having an affect but could it be? I thought CH was a full number but is it a % behind the scenes?
25.2 CH 25 PH 23 - should be 24 (exact is 23.75)
14 CH 13 PH 13 - should be 12 (exact 12.35)
42.9 CH 43 PH 40 - should be 41 (exact 40.85)
13.9 CH 13 PH 13 - should be 12.3 (12.35 exact
rulefan
Tour Winner
What is the exact CR, Par and Slope?
LizAig
Active member
D-S
Well-known member
If they are both 24.0 there is no way it is a rounding issue as the calculation is the same for both assuming they are both playing from the same tee sets on the same course. And are the same gender.
LizAig
Active member
That’s my thinking too but I’m beginning to doubt myself _ especially as I emailed Club V1 to query it and they haven’t got back to me!
louise_a
Money List Winner
CH is an exact number to several decimal places if there is another percentage to be taken off.
rulefan
Tour Winner
Did they both use the same method to enter the competition and their scores? eg HDID PSI, simple cards or the EG app .
A thought. Was one a comp entry and the other general play?
LizAig
Active member
No - they are both playing in the same comp and knowing them I’m pretty sure both booked in using their phones. Scores aren’t entered yet as the comp is tomorrow.
LizAig
Active member
So the 4 extra PHs (not the identical ones that started my question) are likely to be different because the CH is likely to be xx.xxx
louise_a
Money List Winner
I have checked the examples you gave and the calculated playing handicaps were correct, so yes the CHs are xx.xxx which is the reason for the differences.
Alan Clifford
Well-known member
I can guess at this one. Although their handicap indexes are both 24.0, this is a statistic calculated by avereraging 8 numbers and then rounding to 1 decimal place. They may be doing the averaging on the fly. I came across an anomoly like this in South Africa and they told me that they hold differentials in their database to (if I remember correctly) to 6 decimal places. But even just averaging the eight 1 decimal point differentials and then multiplying the unrounded average by .95 and then rounding the results to integers could produce the anomally.
Alan Clifford
Well-known member
If you post both players' best 8 differential, we could do a machine precision calculation to check that bit of it at least.
LizAig
Active member
Steve’s 8 score differentials are 26.5, 20.5, 24.5, 26.5, 21.5, 26.5, 19.5 and 26.5
Cliff’s are 26.5, 21.5, 26.5, 19.5, 25.5, 20.5, 28.4 and 26.5
Voyager EMH
Slipper Wearing Plucker of Pheasants
Steve 24.0 HI
Cliff 24.4 HI
Is this correct?
If so - should explain it all.
Cliff 24.4 HI
Is this correct?
If so - should explain it all.
D-S
Well-known member
Oh, that's ruined the mystery of it all!
LizAig
Active member
Update!
After speaking to our regional handicap advisor and to Club V1 it turns out that Club V1 isn’t always computing the correct PH until the player signs in….so although the system recognised that a players HI has changed it isn’t updating the PH - when one player signed in it still said his PH was 23 but the label that came out said 22! Our regional advisors club doesn’t use Club V1 so she spoke to another EG rep who does use that system and they had exactly the same issue - 24 of their players, off the same HI, had different PHs.
The advice was to send an email to members letting them know their PH may not be correct on the online booking sheet but should be on the label (should!).
After speaking to our regional handicap advisor and to Club V1 it turns out that Club V1 isn’t always computing the correct PH until the player signs in….so although the system recognised that a players HI has changed it isn’t updating the PH - when one player signed in it still said his PH was 23 but the label that came out said 22! Our regional advisors club doesn’t use Club V1 so she spoke to another EG rep who does use that system and they had exactly the same issue - 24 of their players, off the same HI, had different PHs.
The advice was to send an email to members letting them know their PH may not be correct on the online booking sheet but should be on the label (should!).
Alan Clifford
Well-known member
tobybarker
Active member
this is why sign-in for all comps (or indeed any event) is a good idea....it forces ClubV1 to go and get the latest HCPs for a player. We had the situation where a visitor, who played last year's seniors open, came again this year but the system hadn't ever been prompted to update the guy's hcp....he'd changed index significantly in the meantime.
Just why it cant do that for you is beyond me.....but then, I was only a programmer for 20 years before finding a better profession
Just why it cant do that for you is beyond me.....but then, I was only a programmer for 20 years before finding a better profession
