The d-pawn is now a giant and so White has a decisive advantage.

Supported by the tactical line 1...Neg4 2.hxg4? Nxe4! , followed by a mortal ...Qh4+, Black takes his knight to the ideal e3-square.

The departure of White's bishop has left him vulnerable on the dark squares.

Increasing the pressure on the c-file.

Black has a clear initiative.

By means of a minor tactical resource, Black manages to improve his badly placed knight.

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.