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How does the 9-hole 2024 WHS update affect scores?


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In 2024, playing two 9-hole rounds will be scored as playing two 18-hole rounds, but I'm not exactly sure how this will be calculated.  I searched threads but couldn't find a specific answer to my question. 

 

Currently, if I play a 9 hole round, it is saved and then combined with my next 9 hole round. As most of my rounds are 9 holes, it works well, as long as I play another 9-hole round in the future. I understand that many people don't play 9, however. 

 

For example, last Friday I played 9 and shot 36 on a 73.9/139 front 9. On Sunday, I played the same 9 and shot a 39. My combined 18-hole differential was 0.8. 

 

What would this look like in 2024?  

 

 

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Some discussion here:

 

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Erik J. Barzeski | Erie, PA

GEARS • GCQuad/FlightScope • #FeelAintReal

I like the truth and facts. I don't deal in magic grits: 22.

 

"Golf is the only game in which a precise knowledge of the rules can earn one a reputation for bad sportsmanship." — Pat Campbell

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3 minutes ago, rogolf said:

 

Ah, thanks. I went to the WHS site but they didn't have the specific breakdown. Somehwere I read that the 2nd prorated 9 hole score wouldn't be a straight calculation but some sort of adjusted number. This doesn't seem to be true however. 

 

In my case, my 9-hole differential would be 1.5; that means that I would be expected to shoot roughly a 39/78 at my cap. Again, 73.9/139 slope/rating. So shooting a 36 would give me an 18-hole score of 75 and a roughly 0.9 differential. Shooting a 39 would give me a 78 and roughly 3.3 differential. Does that sound about right?  

 

I see my overall cap coming down a bit as a result. I shoot a lot of even to +3 scores on that front 9 but rarely put together a good back to back 9 holes; it's a tough track with a lot of good shots required to be close to par. Plus, it's self-reinforcing. Shoot a couple of good 9-hole scores (let's say par-36) and post a couple of 0.9s: your cap comes down and the expected differential also drops, so your cap will drop a bit more aggressively on your next low scores. 

 

Interesting. 

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42 minutes ago, RoyalMustang said:

 

Ah, thanks. I went to the WHS site but they didn't have the specific breakdown. Somehwere I read that the 2nd prorated 9 hole score wouldn't be a straight calculation but some sort of adjusted number. This doesn't seem to be true however. 

 

In my case, my 9-hole differential would be 1.5; that means that I would be expected to shoot roughly a 39/78 at my cap. Again, 73.9/139 slope/rating. So shooting a 36 would give me an 18-hole score of 75 and a roughly 0.9 differential. Shooting a 39 would give me a 78 and roughly 3.3 differential. Does that sound about right?  

 

I see my overall cap coming down a bit as a result. I shoot a lot of even to +3 scores on that front 9 but rarely put together a good back to back 9 holes; it's a tough track with a lot of good shots required to be close to par. Plus, it's self-reinforcing. Shoot a couple of good 9-hole scores (let's say par-36) and post a couple of 0.9s: your cap comes down and the expected differential also drops, so your cap will drop a bit more aggressively on your next low scores. 

 

Interesting. 

I don't pretend to understand exactly how it works or what the results might be!

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4 minutes ago, rogolf said:

I don't pretend to understand exactly how it works or what the results might be!

I'm not sure either, but in the example the "expected differential" which was added to the actual diff. from the 9-hole score worked out to equate to an 18-hole diff equal to the players Handicap Index + 3.  This number, something like 3 over par net for 18 holes, is fairly close to a typical average score.

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Since the beginning of WHS I have lost track completely how to calculate my net score. I have no clue whatsoever what that "differential" is. But I do know that we here in Finland have so far such a system in WHS that the 2nd 9 holes (which is not played) will be dealt with as 8 holes of net pars and 1 hole of net bogey. From what I have heard (not yet confirmed) we would change to 9 holes ot net parsa, which is what we used to have before WHS. That is what I understand your WHS is also saying. The expected "differential" is 9 net pars.

 

Maybe someone can either confirm my brain work or correct it.

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39 minutes ago, Mr. Bean said:

Since the beginning of WHS I have lost track completely how to calculate my net score. I have no clue whatsoever what that "differential" is. But I do know that we here in Finland have so far such a system in WHS that the 2nd 9 holes (which is not played) will be dealt with as 8 holes of net pars and 1 hole of net bogey. From what I have heard (not yet confirmed) we would change to 9 holes ot net parsa, which is what we used to have before WHS. That is what I understand your WHS is also saying. The expected "differential" is 9 net pars.

 

Maybe someone can either confirm my brain work or correct it.

In CONGU we are currently the same as Finland and the rest of Europe. We will also change to the new formula which I understand the RoW will also. (This may or may not include Australia - currently Oz are quite different).

 

But the key change In the link rogolf gave is "+ Expected 9-hole Score Differential"

I understand this is calculated either based on all players with that Index (14.0 in the example) or individually for each player. Probably the former.

 

IMO it will be similar to and as mysterious as the PCC.

 

Edited by Newby
re Oz
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3 hours ago, Newby said:

 

 

IMO it will be similar to and as mysterious as the PCC.

 


That is exactly what it looks like from their example. The player had a 7.2 differential for 9 holes as a 14.0 index.(they didn’t give his CH for the day) Then his total differential for the “round” was 15.7. So they added 8.5 differential to his actual differential. 
 

Where’d the 8.5 come from? Don’t ask, don’t tell. 🙂

 

 

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37 minutes ago, Augster said:

Where’d the 8.5 come from? Don’t ask, don’t tell. 🙂

 

Uhhhmmmmm… maybe:

 

6 hours ago, davep043 said:

This number, something like 3 over par net for 18 holes, is fairly close to a typical average score.

Erik J. Barzeski | Erie, PA

GEARS • GCQuad/FlightScope • #FeelAintReal

I like the truth and facts. I don't deal in magic grits: 22.

 

"Golf is the only game in which a precise knowledge of the rules can earn one a reputation for bad sportsmanship." — Pat Campbell

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17 hours ago, Mr. Bean said:

Since the beginning of WHS I have lost track completely how to calculate my net score. I have no clue whatsoever what that "differential" is. But I do know that we here in Finland have so far such a system in WHS that the 2nd 9 holes (which is not played) will be dealt with as 8 holes of net pars and 1 hole of net bogey. From what I have heard (not yet confirmed) we would change to 9 holes ot net parsa, which is what we used to have before WHS. That is what I understand your WHS is also saying. The expected "differential" is 9 net pars.

 

Maybe someone can either confirm my brain work or correct it.

Your current system, using what I'd describe as (net par plus one) to fill in the unplayed 9-holes, seems logical, analogous to an 18-hole score of +2 net.  That's reasonably close to an typical player's average net score.  In the USGA's example, the 18-hole equivalent to the "expected 9-hole differential" is about +3 net, also reasonably close to a typical player's net score.  My interpretation only, the "expected differential" will be something close to an average differential, and might vary a bit based on handicap level.  Lower handicaps tend to have smaller dispersion, so their "expected differential" might be closer to their Handicap Index than that of a higher handicapper.

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5 hours ago, davep043 said:

Your current system, using what I'd describe as (net par plus one) to fill in the unplayed 9-holes, seems logical, analogous to an 18-hole score of +2 net.  That's reasonably close to an typical player's average net score.  In the USGA's example, the 18-hole equivalent to the "expected 9-hole differential" is about +3 net, also reasonably close to a typical player's net score.  My interpretation only, the "expected differential" will be something close to an average differential, and might vary a bit based on handicap level.  Lower handicaps tend to have smaller dispersion, so their "expected differential" might be closer to their Handicap Index than that of a higher handicapper.

 

I wonder if "they" can make this system even more complicated as it is now...

 

Oh my, it used to be so easy and simple, but then came the computer 🤥

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1 hour ago, Mr. Bean said:

I wonder if "they" can make this system even more complicated as it is now...

 

Oh my, it used to be so easy and simple, but then came the computer 🤥

 

It's not that complicated. When you're done with a round, you post your score. If it's nine holes, you put in nine holes. If it's 10-17, you put them in hole by hole.

 

The complicated parts are all hidden: you don't have to calculate the PCC yourself, the "other 9 differential" yourself, etc.

Erik J. Barzeski | Erie, PA

GEARS • GCQuad/FlightScope • #FeelAintReal

I like the truth and facts. I don't deal in magic grits: 22.

 

"Golf is the only game in which a precise knowledge of the rules can earn one a reputation for bad sportsmanship." — Pat Campbell

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Here is an 'interesting' question (for those inclined to view such things as interesting). Assume that on January 1, 2024 you play 9 holes and post that on Ghin. Further assume that on Dec. 31, 2023 you had 9 holes posted but sitting there waiting to be paired with a different 9 holes. 

 

So the question is will Ghin (after you post your 9 hole score on 1/1/2024) just throw away your 9 hole score from 2023 or will it use that score in turning your 9 holes played on Jan. 1, 2024 into an 18 hole score? I am guessing that the old score will be thrown away, but ...

 

dave

 

ps. I guess that there is a third option where both of those 9 holes are (independently) converted to 18 holes. 

Edited by DaveLeeNC
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I always hated having 9 holes hanging around on my scoring record for long periods of time.  Near the end of the active season I had one and made a point of playing another 9 even though it was too cold and windy just so it wouldn’t be there next year.  If the +3 net is the approximate way it will be done that is a score I have many times for the my front nine.

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My home course is 9 holes, another place I play semi regularly is 9 holes. Im very happy about this. 

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Woods: TaylorMade RBZ Tour Spoon, TaylorMade RBZ 5 Wood

Long Irons: Ping Zings 2 Iron, 3 Iron 

Hybrid: Nike Slingshot 5 (26 degrees)

Iron Sets Cleveland Blacks 2012 5 To 9 or Wilson Staff Goosenecks 1988 4 to PW Or Hogan Redline's 1988 4 to E (no 7)

Wedges: Almost always  Mizuno T22 (45/05) ,1969 Fluid Feel PW (52 degrees)  , 80s Wilson BeCu (54 degrees),  60s Wilson Sandy Andy

Sometimes: 60s Ben Hogan Sure Out , 69 Wilson Staff Fluid Feel 8 Iron at PW length , 1958 Reissue Wilson Staff SW (55) , Ping Eye 2 Green Dot W (50)

Putter: Odyssey White Hot XG Marxman Blade or various older Ping blades. 

 

 

 

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2 hours ago, iacas said:

 

It's not that complicated. When you're done with a round, you post your score. If it's nine holes, you put in nine holes. If it's 10-17, you put them in hole by hole.

 

The complicated parts are all hidden: you don't have to calculate the PCC yourself, the "other 9 differential" yourself, etc.

 

Yeah, and when you are in a competition you ask for the referee to tell you where to drop. Not complicated.

 

I am simply trying to understand how this works, but I already got a message from our national association saying "it is a black box"...

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17 hours ago, Mr. Bean said:

 

Yeah, and when you are in a competition you ask for the referee to tell you where to drop. Not complicated.

 

I am simply trying to understand how this works, but I already got a message from our national association saying "it is a black box"...

It's only the + Expected 9-hole Score Differential that's in the box. 🤔

Edited by Newby
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