Analyzing Shirov’s games – Find the sacrifices

Alexei Shirov has always been known for sharp and creative play. While preparing my April Tactics Ebook, I came across this interesting game of his, where Black had to make a couple of precise decisions:

Grachev – Shirov, 2014, analysis position 1
 Black to move. How can he win the queen on a spot?

Grachev – Shirov, 2014, analysis position 2
Black to move. How can he regain the piece and obtain better position?

For the full analysis, see my April Tactics book, or you can just view the game here.