Pre-empts make life difficult for the opponents as their overcall will inevitably be at a higher level.
To open 2 diamonds, 2 hearts or 2 spades, you need:
- 6-9HCP
- 6 cards in the suit including two high honors (ace, king or queen)
Careful ! Never open a weak 2 opening with:
- two high honors outside the suit
- or 2 aces
- or 4 cards in the other major