This is a good defensive protoss opener build which allows for three early stalkers to hunt for offensive pylons and deny scouting while gathering scouting information of your own. Though weak to aggressive 4-gate style builds it is very flexible and allows for many different builds to follow.
9 – Pylon
Chrono Boost probes twice
12 – Gateway
14 – Assimilator
15 – Pylon
17 – Cybernetics Core
19 – Gateway
20 – Assimilator
20 – Stalker
22 – Warp Gate
Chrono Boost warp gate research twice
23 – Pylon
25 – Stalker x2
Send stalkers to scout, sniping probe and stopping pylons
Following this you may want to add one or two additional gateways, twilight council for blink or a robotics facility. You will eventually want to get your second up, depending on the timing of your opponent's natural nexus you may want to get aggressive or build a natural of your own.
