Deal 18 ♠  
 
 
♣  
 
 WEST  NORTH  EAST  SOUTH
1NT
23pass BID 
 
 

The bidding has gone as shown.
Decide what you would say, then click on BID above.
  ♠ K Q 5
10 8
K Q 7 3
♣ A Q 7 4
 

 
Deal 18 ♠ A J 6 3
9 4
A 8 5
♣ K J 10 3
 
 WEST  NORTH  EAST  SOUTH
1NT
23pass4♣
pass5♣passpass
pass

Partner's bid asks if you have 4 ♠s, and denies a stopper. (DIRECT DENIES)

You don't have 4 ♠s, nor can you stop s. You have no choice but to bid one of the 4-card Minor suits, so you go up-the-line and bid 4♣. Partner bids 5♣.

 Deal 19 
  ♠ K Q 5
10 8
K Q 7 3
♣ A Q 7 4