White to move! How should white proceed?
Yes, the main line is 1. B:g4 B:g4 2. N:c6 B:d1 3. N:d8 and since b7 is no longer protected and the Bd1 can't move to do so, Black must play 3...R(either):d8 4. R(either):d1.
My shot is for 1Bxg4 Bxg4, Dd2... my idea is play in black squares with future f4->f5. But it's hard to see a final.
I am terrible at openings, but even I can see that 1.Bxg4 Bxg4 2.Nxc6 wins a piece. The illusion is strong, though, that everything is balanced in this position- white breaks the illusion by removing the double threat on his knight by the capture at g6.