Have a look at this quick match between LiquidTLO and Dimaga playing as Protoss and Zerg. They are both extremely high level players. The map is Steppes of War which is small and good for rushing and the caster is burgback.
The Terran starts the match by immediately building two Barracks in the middle of the map. The unsuspecting Zerg fast expands while the Terran starts pumping out Marines. Once he has a small group of them he attacks. You have to give this a try.
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