Deal 17 ♠  
 
 
♣  
 
 WEST  NORTH  EAST  SOUTH
1NT BID 
 

The bidding has gone as shown.
Decide what you would say, then click on BID above.
  ♠ K Q J 9 7 5
5 2
Q 9 5
♣ 8 3
 

 
Deal 17 ♠ 10 6 4
J 10 8 3
A J 8
♣ A 7 5
 
 WEST  NORTH  EAST  SOUTH
1NT2♠
passpasspass

You have a good 6-card suit but only 8 HCP.
This is bare minimum for a DONT bid. The fact that your suit is ♠s should sway you toward bidding.

But with the weak hand you bid 2♠ instead of double. Everybody passes.

 Deal 18 
  ♠ K Q J 9 7 5
5 2
Q 9 5
♣ 8 3