1             Bidding : 1♠ - 3♠ - 3NT* - 4♣ - 4♠ - Pass
Opener ♠ A K 8 6 5 ♥ 7 2 ♦ A K 4 ♣ K 8 3		Responder ♠ Q J 10 3 ♥ K Q 9 ♦ Q J 10 8 ♣ Q 2
* After a Game raise response (showing trump support and 13+ points) 3NT can be used for Blackwood. Having found the trump fit in a major suit it is most unlikely that the Partnership prefers to play in 3NT.
2             Bidding : 1♥ - 2♦ - 3♥* - 4♥ - 4NT - 5♦ - 6♥
Opener ♠ 6 ♥ K Q J 10 5 3 ♦ A 4 ♣ A Q J 10		Responder ♠ A J 10 3 ♥ 4 2 ♦ K Q 10 7 6 3 ♣ 5
* With a Suit Quality (SQ) in Hearts of 10, Opener need not bother calling his Clubs, because his Hearts suit can "go it alone". With only 6 losers Opener should jump rebid his Hearts. After Responder's raise, 3NT is no loner possible for Blackwood. SQ = Number of cards + Honours in a suit
3             Bidding : 1♥ - 3♠* - 3NT - 4♦ - 4NT - 5♥ - 6♥
Opener ♠ 9 6 4 ♥ A K J 5 3 ♦A Q ♣ Q 10 9		Responder ♠ 5 ♥ 10 9 6 2 ♦ K 10 8 3 ♣ A K J 7
* With 11+ HCP, 4+ trumps and a void or singleton Responder makes a double jump to his void or singlteon suit. This is called a Splinter raise.   3NT can here be used as Blackwood.
4             Bidding : 1♠ - 2♦* - 2♥ - 3♠ - 3NT - 4♣ - 4♠
Opener ♠ A Q J 10 7 ♥ A J 6 5 ♦ K 6 4 ♣ 3		Responder ♠ K 8 4 ♥ K Q 2 ♦ Q 10 9 7 2 ♣ 8 5
* With 10-12 points Responder must bid another suit first, before Jump raising Opener's suit to 3♠. 3NT can still be used as Blackwood, which Opener (with only 6 losers) certainly must try.
© 2013 Michael Furstner