Train until the difficult move becomes the obvious move.

A move that requires deliberate effort will fail under pressure, since pressure removes the capacity for deliberation. Training past that point makes the correct action the one you take without choosing, and that is the difference between knowing what to do and doing it.

Practise the important thing past the point where you can do it. Keep going until it is automatic. Competence under pressure is entirely a function of how far past adequate you trained.