MickyB, on Sep 21 2007, 01:38 PM, said:
If South just bids 5♣, he can then pull 5♣ X to 5♦, which should now be to play.
True, but this only works when your long suit is higher than partner's cheapest one. What if North held red suits and South had long clubs? Then 5
♣ is pass/correct and South will have to play 6
♣ without better methods.
Since it seems unlikely you would ever want to play 4N (X or XX), you could have an agreement to help in these situations, taking advantage of both pass and XX. For example -
(4
♠)-4N-(X)-?
pass - no length preference, please bid your longest suit (my shortest 2 suits are equal)
XX - "rescue" - I have a long suit of my own, please bid 5
♣ so I can pass or correct
5
♣ - length preference for clubs over the worse of (hearts or diamonds), pass or correct as usual
5
♦ - length preference for hearts and diamonds over clubs, pass or correct as usual
5
♥ - my long suit is hearts, please pass
I'm sure you could do better, but this preserves most of the original meanings of the 5 level bids, and just gives useful specific meanings to the (forcing) pass and XX.