Signals And Discards

Board 8
West Deals
None Vul
K Q J 9 8 7
A
10 7
J 9 6 2
A 10 4
K Q 6 5 4
K Q 6
A 8
N
WE
S
3 2
10 9 8 7
A 5 4 2
Q 5 3
6 5
J 3 2
J 9 8 3
K 10 7 4
WestNorthEastSouth
112Pass
4All pass  
4 by West

Lead: K

South encourages partner's lead with the 5 hoping for a ruff. North then wins A and continues spades. South overruffs the 3rd round with the J. South must be careful not to exit with a club which would give declarer an extra trick. Best play now is to lead a trump.