Overcalls

1 level

8-15 pts 5+ card suit. (Note: weaker hand requires better suit, ie. for 8 pt hand, should have 2 of top 5 honors in suit)

1

15-17 hcp (as if opened originally with no interference)

2 level (non-jump)

10-15 pts 5+ card suit. See note under 1 level overcalls.

2 level (jump)

5-11 pts 6+ card suit. (most of points in suit bid) Same as an opening weak 2 bid.

2

7-12 pts, at least 5 cards in each of two lower unbid suits (example:

2NT/1 shows , (5 cards in each);
2NT/1 shows ,;
2NT/1 or 1 shows , )

This is called an Unusual No Trump bid.

3 level

4-10 pts 7+ card suit (no outside A or K, i.e. no A or K outside the suit bid). Same as an opening preemptive 3 bid.

4 level

Same as 3 level except a longer suit (8+ cards).