For an overcall to be called “preemptive”, your hand must be weak, not strong (6 - 9 high card points)
To show a weak hand like this, you must jump at least one level in the bidding
The number of levels you jump to is not related to points, but depends on the number of cards in your suit
The higher you jump, the more cards you show in that suit
Your long suit must contain some top honours
The vulnerability makes a big difference as to whether you enter the bidding at all with a weak hand
When your side is vulnerable and the other side is not, you need a very strong suit to jump a level or more of the bidding
Partner doesn’t need points to raise you; cards in your suit are more important
The more trumps partner holds, the more powerful your hands will be if you play in your trump suit
Hands with big fits will declare better than they will defend
You don’t always expect to make your contract, but you’re usually in a win-win situation anyway
If your side doesn’t make, the other side could have made their own contract (so don’t worry!)
Here are earlier videos on Preemptive Jump Overcalls.
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