Just returned from playing Pinehurst. It gets better every time.
I can't think of any other course that intentionally uses multiple types of sand in their bunkers. I thought I remembered this being a complaint expressed by some the players during the 1999 US Open. I agree with the notion that a bunker should be a hazard. I just can't think of another world class course with such unpredictable bunkers. Some are sugar white sand, and others are a more gray brown. The sand depth is also quite unpredictable. As if recovering to those greens isn't challenging enough!
What is the reasoning for this?
Do they plan on leaving them as they are for the next US Open?