Losing Trick Count Examples

Board 1
North Deals
None Vul
10 7
K 3 2
K J 8 7
Q 9 3 2
Q 8 5
A 8
3 2
K 8 7 6 5 4
N
WE
S
9 6 4 2
Q 9 4
Q 9 6 5 4
A
A K J 3
J 10 7 6 5
A 10
J 10

WestNorthEastSouth
 PassPass11
Pass32PassPass3
Pass   
  1. South opens 1 with 7 losers
  2. With 8 losers North calculates 7+8=15. 24-15=9 and bids 3
  3. South hand has the minimum 7 losers so passes.9 tricks is all that can be made

3 by South