middlegame study

Black to play; white to win.

The position is unusual. Therefore the solution has to fit the case.

Since I couldn’t find the win I checked with Stockfish6.0: (1….h5, 2. Nc5  Ke8, 3. Kd2  h4, 4. Ke3  h3, 5. Kf3  -black in zug.)

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