"Dvoretsky" refers to the (rightly) famous trainer and author, Mark Dvoretsky, and the adjectival phrase "Dvoretsky-simple" refers to something that's presented as a sort of warm-up exercise in his books or articles, but would be considered a real workout in almost any other publication. For example, take the following position:
This is the very first exercise in the book
Secrets of Endgame Technique (co-authored with Artur Yusupov ["Jussupow" for those who want to look him up in ChessBases databases]), recently reissued in a corrected and expanded edition by Edition Olms in their "Progress in Chess" series. If you're over 2000 and have a work ethic, get the book!
Anyway, back to the problem: it's White to move and win, and if you can solve this quickly you should definitely give yourself a pat on the back. If you can't, don't feel bad - but keep trying. It took me quite a while to get it, but when I finally did, the satisfaction of doing so made it worthwhile. The answer will be posted by Thursday.