A few posts ago, I presented the concluding moves of a recent pawn ending, challenging the reader to find the mistakes - if any. When I first saw this ending, I understood everything just about immediately; not because I'm so bright or because of my new but sadly unofficial
IM title, but because I've had almost exactly the same ending! So if you want a (
big) hint, have a look
here.
Jonathan (Also not an IM) O'Connor
Steve Bennett (not an IM, not an M, and just barely a P - but I'm working on it)
I think this is the RT that Dvoretsky talks about on page 57.
I don't think that's the only interesting aspect of the position(s), but it is a big part of the story, and a useful concept to incorporate into one's endgame toolkit.