Preparing a king march to the queenside.

1...0-0?! 2.Bh6 Rfc8 3.Qc1! White obtains attacking chances

Preparing an invasion on the queenside.

Black "copied" the opponent's bishop manoeuvre, and with good reason. Now the a2-pawn is in danger.

With a decisive grip on the queenside.

Preparing a "brave king" manoeuvre.

Thus White covers the sensitive f1-square and threatens mate himself.

The king escapes and White wins.

Correctly estimating that White's attack can be parried by a "brave king" manoeuvre.