- When scouting with your probe, check your opponent's gas timing. If he takes it before expanding (10/10 or 14/14) then build a pylon and two gates to wall your main. Build your second nexus quickly if he doesn't commit too much and then push out with your sentries, zealots and mothership core once the wall of your natural is finished.

- If he expands at a regular timing, a stalker/mothership core pressure can protect you against every single kind of agression. Make sure to change your rally point when you are producing Sentries.

- The composition and the size of your wall depends on the map. Ideally, you should avoid to expose your tech buildings.

- Use your chronoboosts solely for Probe production until you saturate both your bases. Then use the chrono on the forge, blink upgrade or on your gateways if the Zerg is aggressive.

- Once your third base is done, send a hallucination to scout your opponent's strategy. If he is already producing an army, adopt a defensive stance. If he is making drones, play aggressively and, in case of overextension use recall with your mothership core.

- After 10 minutes 30, send hallucinations two by two if you want to anticipate your ennemy's composition and have the possibility to adapt. Send them continuously : whenever your hallucinations die, create new ones. Take the information permanently and adapt accordingly.