Weak 2-suited hands - Facts
("Fannie Bay 2s")
The Multi-2♦ includes the Weak Two opening bids of 2♥ and 2♠ plus the strong 2NT (21-22 pts). This makes the 2♥, 2♠ and 2NT bids available for other use.
These three Opening bids can be used for weak 5-5+ suited hands of
6-10 HCP : weak in High Card Points
6-7 losers : powerful in shape (in rare cases only 5 losers)
The Honour cards must be located within the two long suits.

Opening bids are as follow :
2♥    = Hearts and another suit
2♠    = Spades and a minor suit
2NT = Both minor suits

WEAK Responses with 0-11 HCP
Either Pass or make a "Pass or Correct" bid
2♥     >   Pass or bid 2♠ (= "Pass or Correct" bid)
2♠     >   Pass or bid 2♣ (= "Pass or Correct" bid)
2NT  >   Bid your best minor suit

STRONG Responses with 12+HCP and or ♠ trump support :
Invite Game with 8 losers : 2♥ - 3♥ or 2♠ - 3♠
Bid Game with 7 losers : 2♥ - 4♥ or 2♠ - 4♠
Explore Slam with 6 or less losers : 2NT (= Strong Enquiry)

STRONG Responses with 12+HCP but without major suit trump support :
Make a Strong Enquiry.

Strong Enquiry after 2♥ Opening (which includes another suit)
2♥ - 2NT (Strong Enquiry) - ?
3♣ = 2nd suit is, 6-10 HCP (6-7 losers)
3♦  = 2nd suit is , 6-10 HCP (6-7 losers)
3♥ = 2nd suit is ♠, 6-7 HCP (7 losers)
3♠ = 2nd suit is ♠, 8-10 HCP (6 losers)
After Opener's 3♣ or 3♦ rebid   >  3♥ continues the strong enquiry
3♠    = 6-7 HCP (7 losers)
3NT = 8-10 HCP (6 losers)

Strong Enquiry after 2♠ Opening (which includes a minor suit)
2♠ - 2NT (Strong Enquiry) - ?
3♣ = 2nd suit is ♣, 6-7 HCP (7 losers)
3♦  = 2nd suit is , 6-7 HCP (7 losers)
3♥ = 2nd suit is ♣, 8-10 HCP (6 losers)
3♠ = 2nd suit is , 8-10 HCP (6 losers)

Strong Enquiry after 2NT Opening showing both minor suits
2NT - 3♥ (Strong Enquiry) - ?
3♠    = 6-7 HCP (7 losers)
3NT = 8-10 HCP (6 losers)
© 2015 Michael Furstner