The responder after an overcall
With a fit in the opener's major:
make a support bid at level 2, 3 or 4 according to your strength, or make a forcing bid with 11HCP or more (jump shift, cue bid, jump fit)
Without a fit:
- pass with less than 5HCP;
- bid NT with at least one stopper in the overcaller's suit;
- sputnik double with four cards in the unbid suits and at least 7-8HCP.
- To change suits at the two level you need 11HCP and at least five cards. Single jumps are preempts (at your level).
- Without a possible major fit, cue bid with 11HCP or more to ask if Partner has a stopper in the overcall suit.