The thread about Pine Valley's 18th green and previous threads got me to thinking how internal features influence play.
I'm not talking about tiers/plateaus, but a singular internal feature such as a mound or spine/ridge.
I immediately thought of the spine/ridge in the back half of the 12th green at NGLA and how dramatically it affects approaches, recoveries and putting.
The 12th green is elevated above the fronting fairway, however, the land leading to the upslope, is sloped downward.
The first third of the green continues to slope upward from the fronting fairway until it flattens out.
About halfway, maybe 60 % back in the upper portion of the green is a spine/ridge that runs, directionally, from 9 o'clock to 3 o'clock.
While the mound/spine/ridge isn't dramatically high, it's influence is tremendous.
It dramatically impacts approaches, recoveries and putts, especially ones that have to traverse it from other than a 90 degree angle.
The problem it presents becomes exponentially more pronounced when the hole is cut behind the mound/spine/ridge for a variety of reasons.
First and foremost, if a ball goes long, the recovery is incredibly difficult.
Being in the back bunker may be an advantage.
However, if the hole is cut in front of the mound/spine/ridge recovery from over the green gets exponentially more difficult.
The dilema faced is similar to the dilema created when the hole is cut behind the mound/spine/ridge when the approach is short and short and to the flanks of the green. So, approaches hit to the appropriate side of the mound/spine/ridge are greatly rewarded.
Approaches and recoveries hit to the opposite side of the mound/spine/ridge are faced with a very difficult putt, especially when the putt has to ride the mound/spine/ridge as opposed to traversing it at a 90 degree angle. It's not unusual, that putts trying to traverse the mound/spine/ridge don't have the right speed or angle come back to the same side as the golfer started, leaving him that diabolical putt...... again.
While the hole location behind the feature is probably the most challenging, hole locations in front of the feature are no bargain because the front 3rd of the green is sloped and balls hit into that slope usually roll back off the green onto the fronting fairway.
Balls hit long face enormous challenges.
So, here's a relatively small feature that has a dramatic influence on the play of a hole.
CBM's/SR's/CB's horseshoe or thumbprint mound/spine/ridge have similar effects because the back of those greens typically have a sharp falloff, but, the fronts don't have the relatively steep slope, making shots on the green, but short of the horseshoe feature a little less challenging.
Mountain Ridge has mounds/spine/ridges, but they typically run from the perimeter of the green toward the center of the green.
The feature I'm referencing is detached from the perimeter, and more of a center feature.
I'm trying to recall other greens with this feature.
The 9th at GCGC has the feature, but not enough room behind it to cut a cup.
I believe the back of that green may be extended to create function of the mound/spine/ridge that runs across the green.
Preakness Hills has the same feature as GCGC, but, at the front of the green, and again, there isn't enough of the green in front of the mound/spine/ridge to accomodate viable hole locations.
What other greens have this IDENTICAL feature ?
Hidden Creek has a large mound which functions in a similar fashion.
Since they seem to function so well, on the approach, recovery and putting, Why haven't more of them be crafted, especially in modern greens ?