Lev Alburt puzzle

Taken from his book, Chess Strategy for the Tournament player.

Caption: How can White win a piece?
White to move.

I see an exchange sequence where white would trade a queen and knight for black's queen, bishop and rook. Is that what you are looking for?

Originally posted by mwmiller
I see an exchange sequence where white would trade a queen and knight for black's queen, bishop and rook. Is that what you are looking for?

Qxd7+ Qxd7
Nxd7 Kxd7
0-0-0+ Ke8
Kxb2

White: 0-0-0

Picks up the rook.

Originally posted by reyotch
Qxd7+ Qxd7
Nxd7 Kxd7
0-0-0+ Ke8
Kxb2

Originally posted by kmchess
White: 0-0-0

Picks up the rook.

I don't see it, what is it?

Originally posted by exigentsky
I don't see it, what is it?

QxA7

There is an unprotected pawn there.

1. Nxd7 qxd7
2. qxd7 kxd7
3. 0-0-0+

winning the rook

Originally posted by Walshie
QxA7

There is an unprotected pawn there.

Originally posted by HomerJSimpson
1. Nxd7 qxd7
2. qxd7 kxd7
3. 0-0-0+

winning the rook

Originally posted by RahimK
Are you sure? Really sure?

Ok, I officially give up, I just don;t see it, especially since the Nxd7 line does not win a piece.