They knew he was in B, what more information do they need? they played it terribly. When you are 3v1 you need to make sure your in positions to get trades and if the opposition does go for frags, he needs to expose himself as much as possible.
>"B" could be anymore, they need to peek at the right angle.
He could be in corner plat, side, car, anywhere. That is true that you need to get into position to get trade. maikelele wasn't exposing himself, he had smoke that covers him. It's just that Xyp9x wasn't playing safe, he gambled his position for a frag and he took it.
If they lose that round, per say, xyp9x misses his first 15 bullet and the window guy/tunnel guy rushed in because he heard xyp9x was shooting some other guy, you wouldn't comment the same thing and say "pros to kinguin for playing safe there, xyp9x gave his position just to try to spray through smoke which he might or might not get the kill", won't you?