Posted 2013-January-16, 01:51
Playing 4 card suit openings it could go
1h -1nt
2d* 3d**
* 1 round force **8-10 4+D (we use 2♠ as a wk bid with ♦)
If 5c is a splinter looking for 6 south has the goods IMO.
However if it's voidwood you play then North has to bid 4♦ to get south to cue, over 4♥ North can then wheel out keycard, hearing 1 he bids 6♦.