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Erik J. Barzeski

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Re: Common Knowledge Golf Strategy
« Reply #25 on: March 09, 2023, 09:55:17 PM »
the study also noted don't play on bermuda during late afternoons...
Grain doesn't affect break much. It affects speed, for sure: uphill into-the-grain putts play slower on super grainy greens than they would without grain, and downhill with-the-grain putts play faster. Grain itself does not affect break much at all. Something like 1/2" over 20' or so. Mark Sweeney could tell you the actual number, but I remember it being nearly negligible.
Erik J. Barzeski @iacas
Author, Lowest Score Wins, Instructor/Coach, and Lifetime Student of the Game.

I ignore Rob, Tim, and Garland.

Niall C

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Re: Common Knowledge Golf Strategy
« Reply #26 on: March 10, 2023, 10:43:32 AM »
I could be mistaken but I thought the USGA commissioned a study which indicated that the grain of the grass did not affect putts.


If they did they should get their money back. I know Erik is peddling the line that grain doesn't affect the break and instead affects the speed but the two go hand in hand. That's why when you pick a line you should do so knowing how hard you're going to hit it.


A pal of mine once played in a pro-am with Sandy Lyle and asked Sandy to read a 3 foot putt for him. Sandy suggested just inside the right edge. My friend aimed just inside the right edge and missed two inches to the left causing Sandy to apologise profusely saying he forgot that amateurs generally don't rap their putts as hard as the pro's.


Niall

Max Prokopy

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Re: Common Knowledge Golf Strategy
« Reply #27 on: March 10, 2023, 10:53:53 AM »
the study also noted don't play on bermuda during late afternoons...
Grain doesn't affect break much. It affects speed, for sure: uphill into-the-grain putts play slower on super grainy greens than they would without grain, and downhill with-the-grain putts play faster. Grain itself does not affect break much at all. Something like 1/2" over 20' or so. Mark Sweeney could tell you the actual number, but I remember it being nearly negligible.


Erik, thank you for this clarification.  Mark would indeed be the go-to.

Tom_Doak

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Re: Common Knowledge Golf Strategy
« Reply #28 on: March 10, 2023, 11:38:24 AM »
FWIW, I used to be very good at reading greens, and I never really factored in grain at all.


It was certainly more of a factor on older warm-season turf, but I didn't play that many rounds on such greens, and most of those courses didn't have very interesting greens to start with.

Stewart Abramson

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Re: Common Knowledge Golf Strategy
« Reply #29 on: March 10, 2023, 05:03:00 PM »
I'm going to gadfly a few of the things that have come up here... in no particular order...


 it took me more than two decades - from teen youth to my 30s - to understand and bring together the correct, particular visualization that a particular golfer needs. That starts/started from my internal process for any putt on any course which was/has been to read the putt from the cup backwards...eg. "how is the flat entry spot on the cup situated, in relation to the general slopes feeding towards it?"...once I see that, where it goes in perfectly straight, then I just build the "putt" backwards to the player...eg...how does it get to this spot...back to this spot...back to the player...?  The only thing I think I ever was really doing for a player on green reading is matching that path/arc (of spots, from cup back to player) to a mind meld of what the speed ought to be. 


How do you do that; translate the subtleties that you know from 5000 samples into a speed for today's player X?  For a tradesmen like me, it IS the practical magic and only green reading property worth anything...and so when I would read a putt for you, I might have indeed pointed to some spot, short, long or near the cup, but I would've told you what description of foot-speed it should've have been..."it should be slowing down to a foot here...almost out of gas here... it's got to have enough to beat this hill and 5 more feet...you've got to have the courage to roll it firmly up here, so it can swoop down to a place where it can go in..."



That sort of caddy helps me make more putts, but when on my own, I agree with Bob Rotella, that process is making putting way too complicated

Jeff_Brauer

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Re: Common Knowledge Golf Strategy
« Reply #30 on: March 10, 2023, 05:16:58 PM »
I could be mistaken but I thought the USGA commissioned a study which indicated that the grain of the grass did not affect putts.


If they did they should get their money back. I know Erik is peddling the line that grain doesn't affect the break and instead affects the speed but the two go hand in hand. That's why when you pick a line you should do so knowing how hard you're going to hit it.


A pal of mine once played in a pro-am with Sandy Lyle and asked Sandy to read a 3 foot putt for him. Sandy suggested just inside the right edge. My friend aimed just inside the right edge and missed two inches to the left causing Sandy to apologise profusely saying he forgot that amateurs generally don't rap their putts as hard as the pro's.


Niall


I'm surprised Sandy took the blame, LOL.  I have played in pro-ams and on occasion, the pro reading the putt had it half backwards, i.e., breaking right when I read left.  I shoot it off to the idea that they really didn't care all that much, even if maybe my putt might affect their comparably meager pro am day payout.  I did see a few really grind with their ams on a later hole when they realized the putt was really necessary for team score and payout.
Jeff Brauer, ASGCA Director of Outreach

Mike_Young

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Re: Common Knowledge Golf Strategy
« Reply #31 on: March 10, 2023, 10:48:32 PM »
the study also noted don't play on bermuda during late afternoons...
Grain doesn't affect break much. It affects speed, for sure: uphill into-the-grain putts play slower on super grainy greens than they would without grain, and downhill with-the-grain putts play faster. Grain itself does not affect break much at all. Something like 1/2" over 20' or so. Mark Sweeney could tell you the actual number, but I remember it being nearly negligible.
Grain does affect break on Bermuda greens...
"just standing on a corner in Winslow Arizona"

Erik J. Barzeski

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Re: Common Knowledge Golf Strategy
« Reply #32 on: March 10, 2023, 10:58:49 PM »

If they did they should get their money back. I know Erik is peddling the line that grain doesn't affect the break and instead affects the speed but the two go hand in hand. That's why when you pick a line you should do so knowing how hard you're going to hit it.
On a cross-grain putt… the effects on speed are basically nil, and that's the direction where people assume that the grain has the most effect. It's also, as I said before, quite small.


FWIW, I used to be very good at reading greens, and I never really factored in grain at all.
It's even less of a factor as green speeds get higher.


Grain does affect break on Bermuda greens...
No, it doesn't much at all.
Erik J. Barzeski @iacas
Author, Lowest Score Wins, Instructor/Coach, and Lifetime Student of the Game.

I ignore Rob, Tim, and Garland.

Tommy Williamsen

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Re: Common Knowledge Golf Strategy
« Reply #33 on: March 11, 2023, 02:36:46 PM »
I'm going to gadfly a few of the things that have come up here... in no particular order...


When a caddie points to a spot on the green and tells me to aim there, it only helps marginally. I have to see the putt curve in my head. So aiming at a spot isn't that helpful.

Last thing TW, how about putts that aren't read to a spot outside the hole, but are nuances (verbal, pointed or both) of something aimed to one small edge of the cup...like "inside right"..."right/left of center"... "right edge"?  Are such indications also of little use to you...or is it just the bigger breakers you're referencing?


Pointing to a spot on a five-footer is fine. It isn't helpful for me on a 10 footer or more.
Where there is no love, put love; there you will find love.
St. John of the Cross

"Deep within your soul-space is a magnificent cathedral where you are sweet beyond telling." Rumi

Tom_Doak

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Re: Common Knowledge Golf Strategy
« Reply #34 on: March 12, 2023, 11:12:25 AM »
I'm very likely to miss the green entirely from 70 yards, which I won't do as often from 100.

Tom, do you think this preference ever shows up in your designs? Maybe that explains the lack of 70-yard par 3's on your courses.  ;D  But really, do you think you have a tendency to make sure there's always a layup spot at 100 yards while being less concerned about what happens from 50-70, or something like that?


Well, maybe?  But you're assuming I would make it easier for myself.


When I worked on the Stadium course at PGA West for Mr. Dye, we purposely tried to take away the 100-yard layup on short par-4's and par-5's by doing things in that zone that made the players uncomfortable.  We would put a cross bunker there, or make the fairway stop at 120 and pick up again at 80, or make it lower so that the green was semi-blind, to try and take away their comfort zone.


Now that the preferred strategy is to get as close to the green as possible, I favor bunkers 20 to 60 yards short of the green, since numerous Tour players have told me, "We are no better at that shot than you are."  Of course, a Tour pro will rarely miss in that zone . . . if they're not sure they are getting over everything, it's one of the rare times you will see them lay up so they don't leave themselves the 50-yard bunker shot.  But the thought is there, anyway.


I've only been thinking about that for the past five years, though, so I don't know that you would find it in the majority of my work.  My fundamental thought on holes of that length is to reward players for a straight shot, even if they can't quite get to the green, but punish the guy who could have reached it and misses badly off line.  Generally, you do that with a long and narrow green, and you'll see a lot of those on my par-5's.

Jeff Fortson

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Re: Common Knowledge Golf Strategy
« Reply #35 on: March 12, 2023, 11:32:58 AM »
I want to reiterate what Erik and Matt have shared above.  If you're truly averaging lower scores from 100 yards than something shorter than 100 yards, you are in a very, very small sliver of outliers. 
#nowhitebelt

Tom_Doak

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Re: Common Knowledge Golf Strategy
« Reply #36 on: March 12, 2023, 01:04:56 PM »
I want to reiterate what Erik and Matt have shared above.  If you're truly averaging lower scores from 100 yards than something shorter than 100 yards, you are in a very, very small sliver of outliers.


Jeff:


ON AVERAGE, you are certainly right.  On average, the closer you are, the better you'll do.


But in practice, do you not think that most golfers have some particular yardage that they struggle from, from a confidence perspective?  Hell, even Tour pros do:  they are much more dialed in than we are, but they seem to be better when they have a "perfect yardage" for their approach [say 136 for their nine iron] than when they are three yards short of it.


For those of us who are not that good, the confidence gaps are probably a little wider.

Ben Sims

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Re: Common Knowledge Golf Strategy
« Reply #37 on: March 12, 2023, 01:25:58 PM »
I'm very likely to miss the green entirely from 70 yards, which I won't do as often from 100.

Tom, do you think this preference ever shows up in your designs? Maybe that explains the lack of 70-yard par 3's on your courses.  ;D  But really, do you think you have a tendency to make sure there's always a layup spot at 100 yards while being less concerned about what happens from 50-70, or something like that?



Now that the preferred strategy is to get as close to the green as possible, I favor bunkers 20 to 60 yards short of the green, since numerous Tour players have told me, "We are no better at that shot than you are."  Of course, a Tour pro will rarely miss in that zone . . . if they're not sure they are getting over everything, it's one of the rare times you will see them lay up so they don't leave themselves the 50-yard bunker shot.  But the thought is there, anyway.


I've only been thinking about that for the past five years, though, so I don't know that you would find it in the majority of my work.  My fundamental thought on holes of that length is to reward players for a straight shot, even if they can't quite get to the green, but punish the guy who could have reached it and misses badly off line.  Generally, you do that with a long and narrow green, and you'll see a lot of those on my par-5's.


At CommonGround there are a number of hazards affecting “layup” shots. They aren’t universally the same in scope, affect, or position. There are mounds and bunkers, centerline and cross. And they vary from 40-ish yards all the way to 120 yards (the bunker on 13)  from the green. If you and the guys had a plan or pattern for what kinds of shot or what kind of player to focus on in challenging the layups at CG, I can’t find one.

Jeff Fortson

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Re: Common Knowledge Golf Strategy
« Reply #38 on: March 12, 2023, 02:53:06 PM »
I want to reiterate what Erik and Matt have shared above.  If you're truly averaging lower scores from 100 yards than something shorter than 100 yards, you are in a very, very small sliver of outliers.


But in practice, do you not think that most golfers have some particular yardage that they struggle from, from a confidence perspective?  Hell, even Tour pros do:  they are much more dialed in than we are, but they seem to be better when they have a "perfect yardage" for their approach [say 136 for their nine iron] than when they are three yards short of it.



Tom,

That's a good question. Personally, I don't have a yardage I think of as "bad" or something I struggle from more than other yardages (especially sub 120y).  Obviously when a yardage is in the gaps between clubs, it can create confusion and require a deeper skill set to be proficient.  I'm sure there is some data out there available to support what Erik is saying in regards to most amateur golfers.  I can't provide it but I'm guessing it exists. 


At the higher end competitive level it is pretty well understood now that the closer you are to the hole, the better (with obvious exceptions). I would imagine that applies to all golfers, as you said, "ON AVERAGE".  I can certainly understand the feeling of comfortability for individual players at different yardages.  I would be curious to see stats that show "most golfers" score lower from longer distances than yardages they "struggle" from. I'm sure there would be anecdotal examples but I'd guess they are in a small group of outliers as I said above.  I could certainly be wrong as I am basing this off what I have learned from the data guys in golf.
#nowhitebelt

Erik J. Barzeski

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Re: Common Knowledge Golf Strategy
« Reply #39 on: March 12, 2023, 05:31:42 PM »
But in practice, do you not think that most golfers have some particular yardage that they struggle from, from a confidence perspective?
So… even though we can all name some exceptions, oftentimes even if you think YOU are an exception, you're really not if you actually track your rounds and shots and so on. People seemingly forget the bad shots they hit from 100 yards and remember the bad ones they hit from 70 (because they think they're uncomfortable from that range), or whatever. But most people still hold closer to the "closer = closer" rule than even they think.

Anyway… I tried to find amateurs in one of the databases who have a lot of shots from 100 to 50 yards in the fairway (because you don't want to count a player who has a bunch of shots from 95-100, then a gap from 95-75 with only like three shots total — you want a large enough sample size), and was able to find fourteen golfers pretty quickly ranging from a +1 to a 13. My criteria was basically no gaps of more than 3 yards without 3+ shots from any of the in-between yardages (i.e. 10 shots from 78, 1 from 79, 1 from 80, 2 from 81, 1 from 82, then 10 from 83… would fail). Many had 5-10+ shots from 44+ of the 51 yardages.

All but one exhibited a pretty smooth line for the proximity. One player didn't… he had a jump in his proximity around 65 yards. When I looked at his data and almost all of his shots were on a hole with water short and left, so he often hit it long/right. It was about a 310-yard hole, so he laid up near the end of the fairway and so I think (he's a low handicapper, though not the +1) he was intentionally playing away from the hole.

It's only 14 golfers, so I'm not saying it doesn't exist (and never would, as exceptions exist in almost anything)… but, generally, no.

What Tom said is true, of course, that players feel better about "157" if that's a great yardage for them, than "160." But those gaps don't matter quite as much to amateurs… or perhaps they still do, but if 95 is a great yardage for them, a 90-yard shot might play 95 if it's into a little wind or slightly uphill or something. So as a one-off, you'll hear from Tour players that the calculated yardage wasn't a great fit for them… but we don't know that about amateurs when they're playing.


Edit: minimal smoothing to the lines, because for example a yardage where the player hit one bad shot out of three can cause a "bump" in that yardage, but if the yardage one yard short and one yard long of it doesn't have that one truly bad shot… it's still a pretty smooth progression. But, yes, there was some smoothing. Otherwise, you'd have little jumps all over the place until the player hit many, many, many shots from literally every yardage.
« Last Edit: March 12, 2023, 05:33:55 PM by Erik J. Barzeski »
Erik J. Barzeski @iacas
Author, Lowest Score Wins, Instructor/Coach, and Lifetime Student of the Game.

I ignore Rob, Tim, and Garland.

Mike Wagner

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Re: Common Knowledge Golf Strategy
« Reply #40 on: March 13, 2023, 10:09:38 AM »

If they did they should get their money back. I know Erik is peddling the line that grain doesn't affect the break and instead affects the speed but the two go hand in hand. That's why when you pick a line you should do so knowing how hard you're going to hit it.
On a cross-grain putt… the effects on speed are basically nil, and that's the direction where people assume that the grain has the most effect. It's also, as I said before, quite small.


FWIW, I used to be very good at reading greens, and I never really factored in grain at all.
It's even less of a factor as green speeds get higher.


Grain does affect break on Bermuda greens...
No, it doesn't much at all.


Erik, how about older Bermuda greens? How about the affect during the last couple first vs the first couple feet?

Erik J. Barzeski

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Re: Common Knowledge Golf Strategy
« Reply #41 on: March 13, 2023, 02:12:46 PM »
Erik, how about older Bermuda greens? How about the affect during the last couple first vs the first couple feet?
Nope. Tested repeatedly by Mark Sweeney on the super-grainy greens at Kapalua/Sony. Very little (nearly negligible) effect on break.
Erik J. Barzeski @iacas
Author, Lowest Score Wins, Instructor/Coach, and Lifetime Student of the Game.

I ignore Rob, Tim, and Garland.

Mike Wagner

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Re: Common Knowledge Golf Strategy
« Reply #42 on: March 13, 2023, 03:00:33 PM »
Erik, how about older Bermuda greens? How about the affect during the last couple first vs the first couple feet?
Nope. Tested repeatedly by Mark Sweeney on the super-grainy greens at Kapalua/Sony. Very little (nearly negligible) effect on break.


Haven't looked into him enough, but I wouldn't interpret this interview as negligible.


https://www.youtube.com/watch?v=libuU2OFbRg&t=548s

A.G._Crockett

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Re: Common Knowledge Golf Strategy
« Reply #43 on: March 13, 2023, 03:36:08 PM »
I play lots of local and state senior tournaments in NC, and now it’s mostly, of course on Bermuda greens.  While grain varies a bit from course to course, the impact of grain on the BREAK of a putt is generally overrated, while the impact of grain on the SPEED of a putt is at least sometime underrated.  Downhill/down grain is a big deal, as is uphill and into the grain, and when you see a really terrible putt on Bermuda greens, it’s ALWAYS one of those two situations, usually downhill down grain.


Grain on Bermuda greens just won’t overcome slope and change or cancel break, though we love to tell ourselves that. Putts on Bermuda greens that don’t go in and break with the grain to the low side weren’t going in anyway because the speed wasn’t right.  Grain is a much better excuse for a bad putt than operator error. 


There IS an issue with Bermuda greens, though, which is grain changes along the line of a putt that change the speed once or more during the roll.  You could see this very clearly on the aerial views at Sawgrass, and it makes for tough putting.


One personal note: I had the same caddie all three days on a trip to Streamsong, and he was excellent, including at reading putts.  He never said the word “grain” in 54 holes, and neither did the other three caddies that we played with.  It doesn’t mean he wasn’t factoring it in, but I don’t think it was much.


I think Mark Sweeney has said that all the stuff about putts breaking to the mountain or the pond or the clubhouse or whatever is BS; there’s gravity, and nothing else matters much, including grain.
"Golf...is usually played with the outward appearance of great dignity.  It is, nevertheless, a game of considerable passion, either of the explosive type, or that which burns inwardly and sears the soul."      Bobby Jones

A.G._Crockett

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Re: Common Knowledge Golf Strategy
« Reply #44 on: March 13, 2023, 03:54:47 PM »
Yeah, but that was also sort of an admission that he didn't have that great of a short game and didn't have confidence it would improve that much.  And a realization that sometimes the way to improve is by strengthening your strengths, not eliminating your weaknesses.


Also, a couple of years after that, Jack went to Phil Rodgers to work on his short game, and won a couple more majors.  I wonder if he hit more greens in regulation?
Agree with your first statement and would add to your second the reason Jack won the U.S. Open and PGA Championship in 1980 was due to the time and work he put in with Phil Rodgers on his short game. I don't think he wins either without that, as his confidence hit a low point in 1979.


I don’t dispute that Nicklaus, as ANY golfer would, benefited from his work with Rodgers and a better wedge and short game.


But if you say that he wouldn’t have won without that, it’s a BIG statement, given that we’re talking about a guy who had already won 15 majors at that point. At least to me, even if Nicklaus said that it was the work with Rodgers, it may be that the real impact was rededicating himself to practicing.


I think I’d have to see some stats about those two tournaments before I’d fully buy into the idea that Nicklaus won in a way other that what he was best at his whole career; being really long off the tee, and hitting it close on his approach shots.  At the Open, he shot 63 the first day, 68 the last day, and set a tournament scoring record.  I suspect most of that was more of the same Nicklaus formula, rather than scrambling.  I’m willing to be wrong, but I’ll have to see it.
"Golf...is usually played with the outward appearance of great dignity.  It is, nevertheless, a game of considerable passion, either of the explosive type, or that which burns inwardly and sears the soul."      Bobby Jones

Erik J. Barzeski

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Re: Common Knowledge Golf Strategy
« Reply #45 on: March 13, 2023, 05:02:55 PM »
Haven't looked into him enough, but I wouldn't interpret this interview as negligible.
He is talking about wind at first. He says about grain "It's usually not the impact people think it is. The primary difference is the uphill/downhill stimp is very different. At Kapalua the uphill would feel like a 9, and the downhill would feel like a 12."

This is what I have been saying this whole time. Across the grain, there's like 1/2" of difference on a 20-footer due to grain. The situations where the grain is the opposite direction of the break that he talks about are pretty rare. We talked about it at an AimPoint gathering one time at Kiawah Island.
Erik J. Barzeski @iacas
Author, Lowest Score Wins, Instructor/Coach, and Lifetime Student of the Game.

I ignore Rob, Tim, and Garland.

Mike Wagner

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Re: Common Knowledge Golf Strategy
« Reply #46 on: March 13, 2023, 06:46:42 PM »
Haven't looked into him enough, but I wouldn't interpret this interview as negligible.
He is talking about wind at first. He says about grain "It's usually not the impact people think it is. The primary difference is the uphill/downhill stimp is very different. At Kapalua the uphill would feel like a 9, and the downhill would feel like a 12."

This is what I have been saying this whole time. Across the grain, there's like 1/2" of difference on a 20-footer due to grain. The situations where the grain is the opposite direction of the break that he talks about are pretty rare. We talked about it at an AimPoint gathering one time at Kiawah Island.


What's the static speed in determining? a 20 footer has speed to pass the hole say 3 feet every time? Grain is going to affect the putt more as it loses speed, no? For a numbers guy to call a 1/2 inch negligible is kind of surprising. I won't put words in your mouth, but that's surprising to hear that 12% of the hole doesn't mean all that much in making your point.

Erik J. Barzeski

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Re: Common Knowledge Golf Strategy
« Reply #47 on: March 13, 2023, 06:54:02 PM »
What's the static speed in determining?
I'm not sure what you're asking.

a 20 footer has speed to pass the hole say 3 feet every time?
AimPoint typically likes to see a putt go about 18" past the hole. I'm also not sure why this is a question, or what you're asking here, either.

Grain is going to affect the putt more as it loses speed, no?
Why does it matter how much a putt breaks in the part of the putt that should be past the hole? It either went in at that point or already missed.

For a numbers guy to call a 1/2 inch negligible is kind of surprising. I won't put words in your mouth, but that's surprising to hear that 12% of the hole doesn't mean all that much in making your point.
On a putt that breaks 3'… it's < 1.4%. On a 20' putt, a half an inch is also… 0.119°. It's a very small amount.
« Last Edit: March 13, 2023, 07:01:57 PM by Erik J. Barzeski »
Erik J. Barzeski @iacas
Author, Lowest Score Wins, Instructor/Coach, and Lifetime Student of the Game.

I ignore Rob, Tim, and Garland.

Peter Flory

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Re: Common Knowledge Golf Strategy
« Reply #48 on: March 13, 2023, 07:10:05 PM »
Regarding the yardage question, I think that it may have some differences regionally. 


In the Midwest, the closer I am to the green, the better I'm going to do.  Getting clean contact isn't an issue at all.  It's like hitting off of a mat.


But if you put me at LACC or Memorial Park, I would struggle a lot with shots in the 30-70 yard range out of the fairway.  Maybe I'd get used to it if I played there all the time, but for a visitor, it's tough.  I'd be seeking to have a shot with a full swing instead of a partial one in those conditions. 

Tom_Doak

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Re: Common Knowledge Golf Strategy
« Reply #49 on: March 13, 2023, 07:11:22 PM »
"At Kapalua the uphill would feel like a 9, and the downhill would feel like a 12."



When the Plantation Course at Kapalua opened I asked Peter Jacobsen what he thought of it, and he said it was hard to tell because the downhill putts were about a 10, and the uphill putts were about a 5.  I'm sure he was exaggerating a little bit, but he thought the difference was huge.  Of course, that is more about the slope than about the grain.  TOUR pros are no longer used to having to hit putts on severely uphill greens.

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