This week's StarCraft class was about the techniques of scouting and anti-scouting.
In an amusing replay of a Protoss vs. Terran match, the Protoss player pulls off quite an anti-scouting maneuver. Apparently he's a Korean player who is known for ridiculous strategies and he likes to suddenly put on some music and start singing during the critical moments of his plans.
In this game, he uses two probes to block the ramp leading to...an empty base. The enemy's SCV scouts, tries to get past these probes, but the probes kill the SCV. Later, he replaces these probes with two zealots to block the ramp, and he even builds a pylon outside the ramp. The other player is thinking "this is obviously his main base." The zealots fend off another SCV scout.
The Terran then sends the full force of his army at this ramp, and finally gets up it. The zealots run around a bit, trying to waste time as the Terran player realizes this is a completely empty starting zone with no Protoss base at all. At this time (cue the music!) the Korean player does two things. Remember that pylon just down the ramp to this fake base? Next to it he suddenly builds a whole set of cannons to lock the enemy units inside the empty base! Some nuance of strategy was lost on me here, but apparently the Terran used a fairly standard Terran vs. Protoss build here and that meant his tanks didn't have siege mode yet, so the cannons were especially devastating. Second, the Protoss player had been building mass dragoons this entire time at his actual base and sent them to the Terran's (undefended) main base. The Terran realized he was in trouble before the dragoons even arrived, as the Terran had already floated away all his builds to be annoying. Interestingly, the Protoss player forfeited at this point. Apparently this match was broadcast live and it was too boring to have to tech to air units and go hunt down the floating buildings, so the Protoss player just quit, ha.
In this match of Zerg vs. Terran, the Terran player scouts with an SCV to find a Lair in the process of building and a hydralisk den already in place. He expects lurkers, we assume, so he builds up a