sawtooth
Tour Winner
Following on from Duncan's post ...
There is only one NPR. You just have to work out the nearest point, not nearer the hole, where both the ball and your stance are clear of the obstruction. For a ball in a given location on a path, it is quite possible that someone who plays standing close to the ball might have NPR on one side of the path and someone else who stands a long way from ball has NPR on the other.
Can there not be 2 NPR's (a tie) if the ball is positioned such a way on a path that NPR is the same distance whether you take your stance left or right of the path?
Assuming player has a choice of sides in that case?