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95 - 2 x GIR Spreadsheet

iacas

By iacas,
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iacas

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6 minutes ago, Missouri Swede said:

Yeah,  but I didn't know if I needed to adjust anything in entering my rounds, like add 1 to my score to make it equivalent to a par 72 course.

I’m not worried about it. I doubt it’s going to be that accurate where a strike matters.

Erik J. Barzeski — ⛳ I knock a ball. It goes in a gopher hole. 🏌🏼‍♂️
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billchao
billchao

I’m atypical? I’m shocked 😜

Bob M
Bob M

I just checked 5 rounds (one was two 9s combined) and my predicted (using this formula) versus actual was within a stroke except for one round for which the formula predicted an 83 versus the 89 that

iacas
iacas

In Lowest Score Wins we cited a commonly used formula that illustrates the importance of GIR. We've found it to generally be pretty accurate if you're a fairly "average" golfer who can shoot anywhere

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iacas

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I sorted the date column again, and added my 74 with 12 GIR and 29 putts.

The formula is off by 3, but is off by 5 if I would have taken 31 putts.

Erik J. Barzeski — ⛳ I knock a ball. It goes in a gopher hole. 🏌🏼‍♂️
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TourSpoon Super Member

TourSpoon

13 hours ago, iacas said:

The formula is off by 3, but is off by 5 if I would have taken 31 putts.

The data is pretty interesting so far....

I think I get the 31 putts (over and under is the variance) as being an optimal predictor of score given the number of greens hit. Please elaborate on the significance of 31. Thanks!  

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ChetlovesMer Incredible Member

ChetlovesMer

I just threw yesterday's round in there. Too many penalty shots yesterday. Otherwise it would have been pretty close. 

My bag is an ever-changing combination of clubs. 

A mix I am forever tinkering with. 

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iacas

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Posted my round of 75 with 32 putts and 11 GIR today. I didn't try to make too many putts, but it was still okay.

Erik J. Barzeski — ⛳ I knock a ball. It goes in a gopher hole. 🏌🏼‍♂️
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phillyk Super Member

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On 5/18/2023 at 4:38 PM, iacas said:

I didn't try to make too many putts…

What’s that mean? You sandbagging? 😉

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iacas

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1 minute ago, phillyk said:

What’s that mean? You sandbagging? 😉

Sure. 🤣

Erik J. Barzeski — ⛳ I knock a ball. It goes in a gopher hole. 🏌🏼‍♂️
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Darkfrog Super Member

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Added my round from this morning. Shot 80, 6 x GIR, 1 penalty, 29 putts.

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TourSpoon Super Member

TourSpoon

This morning I shot 75 with 10 greens, 29 putts, and 2 penalty strokes. The formula nailed it. @iacas what is the significance of 31  putts in the spreadsheet? 

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billchao Incredible Member

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I keep adding my rounds to the spreadsheet but I don't know if I'll ever play to the formula.

Bill

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WillieT Great Member

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Only 2nd full round in the past few weeks.  The prediction was pretty spot on, had a horrible day of putting - been averaging around 30 putts, Friday was 41.  

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2 hours ago, billchao said:

I keep adding my rounds to the spreadsheet but I don't know if I'll ever play to the formula.

We'll be able to do some analysis later on. My early hunch is that your putting plus your penalties play a big role.

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Erik J. Barzeski — ⛳ I knock a ball. It goes in a gopher hole. 🏌🏼‍♂️
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Darkfrog Super Member

Darkfrog

Added today’s round. Shot 83 with 5 GIR, 0 penalties, and 33 putts. Off the top of my head I missed three putts inside 4 feet. 

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boogielicious Incredible Member

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I added my 86 with 1 GIR and 30 putts yesterday. I had a bunch of one putts.

Scott

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  • 2 weeks later...
ssbn611 Established Member

ssbn611

Added a score from 5/27. Shot 88 and prediction is 85. This is a par 71 course.

Jeff

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TourSpoon Super Member

TourSpoon

(edited)

I put in 4 more scores today. All within 1 or 2 of predictions. Erik @iacas can you explain the significance of the 31 putts column? 

Edited by TourSpoon
Clarification

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22 minutes ago, TourSpoon said:

I put in 4 more scores today. All within 1 or 2 of predictions. Erik @iacas can you explain the significance of the 31 putts column? 

No. It's just my best guess at maybe an adjustment. If you have 42 putts, the 95-2xGIR isn't going to work, of course.

Erik J. Barzeski — ⛳ I knock a ball. It goes in a gopher hole. 🏌🏼‍♂️
Director of Instruction Golf Evolution • Owner, The Sand Trap .com • Author, Lowest Score Wins
Golf Digest "Best Young Teachers in America" 2016-17 & "Best in State" 2017-20 • WNY Section PGA Teacher of the Year 2019 :edel: :true_linkswear:

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TourSpoon Super Member

TourSpoon

18 minutes ago, iacas said:

No. It's just my best guess at maybe an adjustment.

Its pretty interesting as an adjustment factor and has hit a few times. I know that my averages over a few years of stat keeping is between 30.5 and 31.5. You are definitely on to something. 

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