In this episode of Svitlana's Smart Moves, Svitlana Demchenko explores how to keep complete control of a position through the classic game Petrosian vs. Unzicker. She shows how Petrosian calmly neutralized every source of counterplay, dominated the open c-file and gradually improved his pieces before creating a second weakness on the kingside. A remarkable king walk from g1 all the way to b1 clears the way for a pawn storm and demonstrates how even the king can play an important role in a long term strategic plan. The lesson highlights prophylaxis, the principle of two weaknesses and the art of turning a small positional advantage into a winning attack.