Editing Stayman convention (section)

==Five-card major Stayman==
This allows responder to check for 5-3 major fits where it is possible that opener's 1NT or 2NT might include a five-card major. As described by Australian Ron Klinger, it can be played with a weak or strong 1NT.

1NT - 2{{Clubs}}
*2{{Diams}} = minimum, no 5M
*2M      = minimum, 5M
*2NT     = Maximum, no 5M
*3M      = Maximum, 5M

1NT - 2{{Clubs}}; 2{{Diams}}/2NT
*3{{Clubs}} = Stayman
*3{{Diams}} = --> {{Hearts}}
*3{{Hearts}} = --> {{Spades}}
*3{{Spades}} = ?
*3NT     = to play

After a transfer, accept it with any 4333, bid 3NT with only two trumps, otherwise bid 4M.

1NT - 2{{Clubs}}; 2{{Diams}}/2NT - 3{{Clubs}} = Stayman
*3{{Diams}} = 4M333
*3{{Hearts}} = 4{{Hearts}}, not 4333
*3{{Spades}} = 4{{Spades}}, not 4333, not 4{{Hearts}}
*3NT     = no 4M

1NT - 2{{Clubs}}; 2{{Diams}}/2NT - 3{{Clubs}}, 3{{Diams}}
*3{{Hearts}} = 4{{Spades}}, not 4{{Hearts}}
*3{{Spades}} = 4{{Hearts}}, not 4{{Spades}}
*3NT     = to play
*4{{Diams}} = bid your 4 card Major

An alternative, simpler version of five-card Stayman is:

1NT - 2{{Clubs}}
*2{{Diams}} = No 5CM
*2M      = 5CM

This structure permits use by weak hands with 5+ diamonds and 2+ cards in each major.

After 1NT - 2{{Clubs}}; 2{{Diams}}
*2M      = 4M invitational
*2NT     = invitational, no major
*3M      = 4M game-forcing

If responder has a five-card major, he begins with a [[Jacoby transfer|transfer]]. After completion of the transfer, bidding the other major at the three level shows four cards in it and a game forcing hand, in line with the 1NT - 2{{Clubs}}, 2{{Diams}} structure above (1NT - 2{{Diams}}, 2{{Hearts}} - 2{{Spades}} = invitational 5{{Hearts}}-4{{Spades}}).

Similarly after 2NT - 3{{Clubs}}; 3{{Diams}}
*3M      = 4M 
*3NT     = no major

A drawback of Five-Card Major Stayman (particularly the simpler version) is that the weaker hand may become declarer in a 4-4 major fit.