Deal 24 ♠  
 
 
♣  
 
 WEST  NORTH  EAST  SOUTH
1NT
pass22♠ BID 
 

You open 1NT and partner responds 2.
However, your Right Hand Opponent injects a 2♠ overcall.

What do you bid?
  ♠ 9 4
A J 8 6
A K 9
♣ A 8 6 5
 

 
Deal 24 ♠ 10 8 6
Q 9 7 5 3 2
6 5 2
♣ 9
 
 WEST  NORTH  EAST  SOUTH
1NT
pass22♠3
passpasspass

More often than not it is correct to pass after an opponent overcalls your partner's transfer response.
This is because your partner might be very weak, and in any case your partner knows a lot about your hand while you don't know much about his.

However, in this case you know that your side has at least 9 s, and you are weak in ♠s. So you bid 3, knowing that even if you go down it may be better than letting them play ♠s.


 Deal 25 
  ♠ 9 4
A J 8 6
A K 9
♣ A 8 6 5