This is a very old aggressive build which can be used in all matchups. This build utilizes very quick warp gate technology combined with 4 early gateways off one base in order to attack with a large number of units early on and sustain the attack using a proxy pylon warping units near your opponent's base.
9 - Pylon
11- Gateway
14 - Gas
14 - Pylon
15 - Cybernetics core
Scout with the probe that builds the cybernetics core.Check for proxy pylons and then the position of your opponent's base and what build they are going
16 - Zealot
20 - Warp Gate research
Constantly chrono boost your warp gate research till it is completed
20 - Stalker
23 - 4
Gateways
At this point you want to constantly push out units, warp in as many stalkers as you can until you run out of gas and only make zealots when you are low on gas. Chrono boost your warp gates when you have a chance for faster warp ins and do not miss any warp ins. Put pylons in and around your opponent's base for warp in reinforcements.
