FEN: 4K1k1/8/1p5p/1Pp3b1/8/1P3P2/P1B2P2/8 w - -
Source: Arasan 19.189 by Jon Dart
Best move: f4

This study won the 1st Prize in Šachová skladba (111/10628) 2011-04, f4 allows white to avoid a zugzwang position at the end of a very deep combination. Beautifully explained here.