[mewmew]

to hold of 4 gate just make sure you have enough units by the time it hits to defend.

terran - 2 - 3 bunkers + scv repairing. Marines + Marauders

protoss - go for 3 gate robo and FF ramp till Immortals pop. sort of the safest build out there for P

zerg - 3 spines minimum if you're not confident, speedlings + 4 to 5 roaches should hold his first wave. use some lings to destroy his proxy pylon while he's distracted by the main battle at your base. try NOT to let queen at the nat run loose and get killed. use hold pos at the min line if you want to be safe.