2.axb4?! cxb4 3.Nb5 b3+ Black wins.

After an unusual manoeuvre the knight has become a great piece.

The only way of escaping from the pin.

Black has the initiative.

Preparing a little trick that will alter the position in Black's favour.

The unappealing 2.Bxd5 exd5 3.Ne2 was a lesser evil.

White couldn't avoid this scenario by 3.Qb1? due to Nxc3 4.bxc3 Ne2+ winning a pawn.

Recovering the piece with a clear positional plus.

With a double threat at e5 and a3.