Calculation

Although this is a "what to play?"  problem, its also great to practice calculation, at least in my opinion.

I did not calculate correctly, at least on this move, but since my opponent mis-calculated two moves later, and with far worse consequences, I went on to win.

Black to play after 18...Ng6

Its also interesting to skip a couple of moves before this move, as that was probably more balanced and white's choice dis-advantaged him.

White to play after 17...Ng5