The knight and bishop are unstably placed, and understanding this allowed Black to find a long queen move:

White must lose a piece.

White gets some compensation for the piece in the form of control of the open files, an advantage in development, and the fact that Black has not castled. Even so, the compensation is insufficient and Black won.

White carelessly played:

The continuation 17.d5 Ne5 18.dxe6 Bxe6 19.Nf4 promised approximate equality.

It turns out that after 19.Rxa4, there follows the double attack 19...Qb5 20.Rb4 Qxe2 21.Bxb7 Rad8 – White’s position is worse, because of the weakness of his pawns and the activity of the black pieces. The attack on the f2-pawn will be very unpleasant.

This is also a double attack, but without consequences for Black – White has a bishop hanging.

Transferring the bishop to its strongest square on b6.

White resigned.

With his last move, White withdrew his knight from d4, counting on driving the enemy rook back into its own camp. But he missed a blow, which became possible as a result of the lack of coordination between the white pieces: