Threatening to take the Knight which is pinned to the White Queen. If white takes the bishop the same finale as the previous note still works.

White can't resist but from now I felt this was a forced mate.

The knight was under threat and could move as it is no longer pinned but this would allow the Black Queen to h4 to deliver mate down the h file. White takes the g pawn but just ends up with more of his pieces attacked.

Maintaining control of the h file and attacking the bishop as well as the knight.

White decides to save the knight in the hope that if Rxg7 he might have a breathing space to escape the mate.

Black threatens mate. Mate wins the game.

To give the king an escape square on f2.

This takes away the f2 square. There is no defence to Qh1 mate so White resigns. A well known attacking motif arising from an unusual opening.