He holds a bane allin without a bunker or ebay block.
He can beat a bane allin here so he makes it look like he’s weak by putting addons on the outside of his wall, having no bunker, a delayed factory (no siege tanks), and having no ebay block to reinforce the depots.
The key is to appear weak when you are strong and appear strong when you are weak. When you are strong, you want your opponent to attack you so that you have a defender’s advantage. When you are weak, you want your opponent to invest into an attack and then abort the attack after the investment is made.
There are two main ways to do this.
- Take middle ground stances, that are hard to read, and have hyper refined followups. This is a game of having more refined responses than your opponent. You make a few lings, but not quite enough to defend, but actually it is enough to defend because you have super refined response.
- Make deliberate misplays that open up specific weaknesses, then hard counter the attack that would take advantage of your weakness. This is a game of scouting manipulation and it serves to make your opponent mistrust his scouting. If he sees something, tries to take advantage of it, and fails, then he will be less likely to read into your mistakes in the future. In fact, he may even correlate your mistakes with him losing, confusing him into thinking the mistake is an advantage, causing him to never take advantage of your mistakes. This then allows you to make mistakes and he can’t tell if it’s bait or a real vulnerability. A common way this is done is by putting an overlord where a terran thinks he can kill it then killing his marines with some zerglings now that the marines leave the bunker.
Gumiho clearly understands this because this game was an obvious type-1 fake. He’s taking a middle ground stance that kinda looks like it can be bane busted but in reality he’s totally ready for it. Because attacks like this require guaranteed damage to the zerg’s own economy, merely by making lings instead of drones, the risk analysis should be heavily skewed against doing a bane allin – the use should be extremely rare, and only when you are 100% confident he can’t hold, such as if one of the barracks was proxied (making it harder to wall both the nat and the main on time).