Takeout Doubles

Board 3
South Deals
E-W Vul

♠	10 8 7 6
♥	10 7 4
♦	10 7 4
♣	K 5 2

♠	A K J 9
♥	Q 9 5 3
♦	Q 9 6 5 3
♣	—

N
W		E
S

♠	5 2
♥	8 6
♦	A K J 8
♣	A J 10 7 4

♠	Q 4 3
♥	A K J 2
♦	2
♣	Q 9 8 6 3

West	North	East	South
			1♣
Dbl	Pass	3NT	All pass

East, knowing that West has an opening hand, can bid 3 NT with an excellent club stop and enough HCP for game.
Lead is ♣ 3 and North plays the King. Declarer should win ♣ A and play the ♣ J to set up the ♣ 10 for the 9th trick.