My friend played in craftcup and lost against a protoss player who didn't scout anything, didn't see anything but still knew everything.
I could explain it but it's easier if you watch it yourself
You can download the replay here : http://www.bitsperbeat.com/sc2/?site=match-details&ID=47472
Just watch TLCernst.138 view. It starts when he moves out. ( around the 6min mark )
Give me ur oppinion on this pls thx!