1...Qa7? 2.Nxd5+-
1...Rc6 2.Qxb6 Rxb7 3.Na4+/-

White soon won more material, and the game.

Forcing a winning pawn ending.

White resigned

Initiating an exchange combination that will help in realizing the extra pawn.

Unfortunately for Black, he cannot even save the b4-pawn.

With an easy win.

Inviting a queen exchange, after which the bishop pair would become even more significant.

1...Qe4? 2.e6! fxe6 3.Re1 with a strong attack.
1...Qf5 2.Re1 Nc7 3.Bb1 Qd7 4.Bd6 lets White keep the advantage.

In the absence of queens it becomes easier for White to advance his kingside majority.