Course rating. Slope rating. You’ll see both numbers posted on the scorecard of the course you’re playing. Here's what they actually mean.

One of the best-designed greens at the Ocean Course belongs to the long par-4 6th hole. It exemplifies the contouring, day-to-day variety, and playability that are the hallmarks of Dye’s greens.

A U.S. Open course is tough by any measure. The measure the United States Golf Association uses is the course and slope rating system, which assigns two different numbers meaning two different things.