To me one of the defining characteristics of a great green is that there are not only multiple challenging possible pin positions, there is also at least one pin position that is something special. Many of the older courses have those special challenges, but do not have multiple viable pin positions (17 and 18 at TOC and 14 and 17 at Pebble Beach come immediately to mind). Many modern courses seem to have cottoned on to the concept of multiple positions, but not necessarily been able to create those truly special challenges (I must admit, in mitigation, that these sorts of special positions, on complex greens, do not always reveal themselves easily. Perhaps some of the newer course I have played have such positions--I just have not yet found them).
I am not, BTW, talking about the "greens within greens" concept. That, which is epitomised to me, at least, by the 1st at NGLA, is a more simplistic concept--building quadrants sharply separated by manufactured features. What I have in mind, rather, in the 4th at Dornoch which has at least 5 separate pinning areas, which flow into each other seamlessly and are interconnected in terms of play, and which has at least 2 realy special positions, mid left and center long which only the two finest of shots will ever getr one near and only the finest putting will allow one a par, much less a birdie.
Any thoughts?