The 2-3-1 crease slide gives your defense a simple plan for protecting the middle of the field.
In this setup, the defender in the crease is the hot slide, or first slide. The two slide comes from the opposite side of the field, while the three slide comes from the opposite adjacent defender.
The key is communication and being ready before the slide happens.
In the 2-3-1 formation, the defender in the crease is the hot slide.