Opening at the 4 level

Vulnerability

Always consider the vulnerability before a preemptive bid. Ideally you want to be not-vulnerable and the opponents to be vulnerable.

Opening at the Four Level

Preemptive bids prevent opponents from finding the best contract. Opening the bidding at the 4 level is a preemptive bid. 4♠ and , 4♥ are preemptive bids. This bid does not apply to minor suits because the 4 level is not game, giving the game bonus points, so the risks are greater and the rewards are less than for a 5 level preemptive bid.
When you make this bid you are promising a strong 8-card suit and opening strength values. You must have a good suit with at least two of top three honors.

Point Count Calculation

1. If you have two of top three honors you can bid with a minimum of 5 HCP
2. The range for preemptive four opening bid is usually 5-12 HCP
3. Add your long suit distribution points onto your HCP when calculating your total points. You need to have less points than an opening hand ie.less than 12 points. For example an 8-card suit gives you 4 long suit points. Calculate 8 HCP + 4 LSDP (8 HCP +4 Distribution Points=12 total points)