4...h3 5.Rxh3 Nxf4 6.Bxf4 Qxf4 7.Rf3 Qg5 8.Rg3+-

Having a sound extra pawn, White went on to win.

White aims to restrict the black knight by g2-g4, and for this idea to work he must first swap a few pieces.

The key move, which leaves the black knight badly placed for the rest of the game.

With the devastating threat of Nf6+.

White soon won.

Preparing 2...Rf4 in order to stop the enemy plan of Re3-f3.

After the successful restriction Black can get on with his own play.

Thanks to his strong passed pawn and the weakness on d4, Black is clearly better despite being the exchange down. The game continued: