Chess school: King march

I am starting a new series of strategical and tactical themes - Chess school. In the following example, black pieces are completely tied down to defense, but it seems white can not increase the pressure (or can he?). White puts his last piece (which usually sits in the corner until the endgame) into the attack, and this can be done due to the passiveness of black pieces and lack of counterplay. OK, enough clues, start solving :). After you are done, you can check the complete game below.