Chess960: two move ideas no.11

The unusual idea here by black is that it is fine to drop not just one development tempo, but two! The ultimate reason why is that white's opening is active, but focused too greatly on the king-side wing where the advanced pawns are not restricting black. This allows black to recover the lost tempo.

SP463 white top play: trace back the moves and try to see black's ideas

Enjoy 960

Hint: black shuts down the long diagonal
black is free to play f5 because of gxf5...g6

black intends ...d5/Nd7/Nd6 plan