The Rush is a good way to open with relatively safe aggression. It forces your opponent into an unwanted position. Their movement options are limited, and if they put a wall in the wrong place, it can be easily countered by movement or another wall placement. Lets look at how to perform it, its application and some counters to it.
How to Perform It
1. e8 e2
2. e7 e3
3. e6 e4
If done correctly, the game board should look like this:
This can give you some control over the board and can let you somewhat control where the opponent is going to go.Some of these rely on rotations to stall them, meaning that it will consist of this:
This puts your opponent in a difficult position because both sides can be closed very easily, meaning that they must commit to either side and go back around the board. As they commit to one side, you can set a trap by blocking a little early to ensure yourself a path to the other side of the board with the least resistance. If done correctly, it may look similar to this scenario:
This opening is relatively new, so not many safe counters have not been found yet.
All in all, this way to open can easily be one of the best ways to aggressively play defensively.