Pre-empt openings are very difficult for the opponents because they have to overcall at a high level.
To open 3 clubs, diamonds, hearts or spades you need:
- 6 to 9HCP
- and 7 cards in that suit including 2 high honors (ace, king or queen)
Be Careful ! Don't open 3 in a suit if you have 2 aces; 1 ace and a void or if you have 4 in a major. These rules only apply in 1st or 2nd seat. In 3rd or 4th seat you can do all of the above !