1.c4!
Clearing the long diagonal for the bishop, where there is no black counterpart.

In order to soften up Black's kingside.

Heading for b3 to harass the a5-bishop.

White has a clear advantage.

1...Bf8!
Black prepares 2...Bh6 to improve the passive bishop.

The game continued 2.Nc1? Bh6 3.Nd3 Qc3 4.Rde2 Bd2 and White resigned.

Black keeps the initiative.

Preparing 2 Bd4 in order to seize the long diagonal.

2.Bd4?? Qxd4! 3.Qxd4 Ne2+-+

Planning to attack on the kingside.