Now the black pawns acquire unexpected mobility.

Although after 4.exf5 Rxf5 Black maintains pressure – Gligoric.

A strong advance that will soften up the h1-a8 diagonal for the bishop.

At the precise moment to secure the control of the long diagonal.

The white king is starting to feel uneasy.

Black has a strong attack.

Preparing Nd3 and f2-f4 in order to attack Black's centre and, indirectly, his king.

4...Re8 5.f5 g5 6.Bf3! , intending 7 Bh5 – Geller.

The knight retreats so that the bishop on b2 enhances a future e4-e5 or f4-f5 advance.

Fighting for the d6-square.