The Four Gate is the bread and butter of the Protoss starter package, every Protoss should know and master this as it can be used in almost all scenarios and provides you with an easy tech path to whatever you need to counter your opponent. It is strong against nearly every opening expect perhaps 6 pool (depending on when you get your Zealot), and neutral against a mass Marine/Marauder build (you will stalemate and take it into later game).
by Alex - https://www.blizzardguides.com/
Why is there no SALT encoding or Overwolf build?
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The push: After your second warp in you should be at 42-45 supply (10-12 army units), take a probe with your army and start moving across the map. Create a proxy pylon near their base, if you are certain begin pushing before the pylon completes, if not, wait for wave 4 of units (wave 3 should have been created back at your base and should be moving to reinforce your army, do NOT WAIT to use your warpgate cooldowns).