It’s not all purgatory. Many of Shinnecock’s greens are downright friendly with raised edges that funnel shots toward the center of the putting surface. Most however are shaped to repel shots away from the flagstick and in some cases off the green entirely. Be advised: every green features serious undulation. A few are so sloped that it’s impossible to imagine the ball stopping on its own.
Bunkers left and right of the green are there to punish inaccuracy; heaven help the player who finds the sand on the right — he’ll face a huge change in elevation to a green running straight downhill from his line of flight. As I said Shinnecock is beauty and beast.
If you currently don’t use a preview stroke try it — and give it a least a month. Always make your preview strokes while focusing on your aim line and visualizing the putt’s roll from start to finish.