Now the knight isn't just blocking the d-pawn, it also attacks the weaknesses on c4 and e4.

Instead of grabbing the exchange, Black launches a counterattack.

10.gxf4 Qh4+ and the bishop is soon captured with check.

Winning a piece, and soon the game.

Heading for c4-e3-d5 in order to exploit the key square d5.

1...Nd5? 2.Nxd5 exd5 would be a strategical error, since the d5-square could no longer be used by the pieces.

Now that ...d6-d5 can no longer be arranged, it is difficult for Black to find an active plan.

There is no hurry to occupy d5. Geller first reinforces his queenside.

Thanks to his great knight, White has a clear advantage.