Hi_Lali

The 3NT bidder forgot the Lebensohl convention and thought her partner had a H stopper with points inviting 3NT so she bid 3NT. It was suggested to me that opposite a strong NT hand that bypassed the 2NT, there are some who would be more inclined to bid 4S. My question then is if your partner opened 2NT showing a strong 20-21 flat hand, would you still say you would transfer to S and then bid on to 4S unilaterally with only a 5cd suit? The scoring is mp's and your partner is favored to have the AS so I would be more inclined to pass feeling that there were at least 4 probably 5 tricks in NT which scores better and 3NT partner said she has good stoppers in the preempt suit.

If partner HAD alerted the 2NT bid and then went on to bid 3NT.... I would have no problem with the advancer now bidding 4S. But the failure to alert becomes UI and it must be determined IF there were any logical alternatives per law 16B. If you are trying to bid Leb and your partner now refuses the transfer and instead bids 3NT, your partner should have a very strong hand, H stoppers, doubleton or even stiff S and maybe a running minor saying you can make 3NT with my hand partner. Can you pass partner's 3NT? I would consider it as an option vs bidding 4S and finding my partner with xx in S. By bidding 3NT when I have asked my partner to bid 3C, my partner has just shown a totally different type of hand that just a regular t/o double. I don't think 4S can be bid now.

In this case the advancer's hand was KQJxx xxx xss xx. Why she didn't remember that she could bid 2S as weak? not sure..... she expected partner to bid 3C and was then going to bid 3S as drop dead. The doubler's hand had about 16-17 hcp's, a stiff AH and ATx in S so hearing what she thought was an invitational NT bid put her partner in 3NT. Now advancer realizes that her partner probably forgot the Leb pulls to 4S.

Bidding goes 2H - X - P- 2NT* P - 3NT - P - 4S P - P - P *2NT was supposed to be a Lebensohl bid forcing 3C but X'ler forgot so not alerted. Before lead, advancer says there was a failure to alert 2NT. 4S makes 4. 3NT goes -1. Should advancer be allowed to correct to 4S having UI that partner does not remember they are playing Lebensohl when she doesn't alert the 2NT and then bids 3NT? Advancer's hand is KQJxx in S and 5323 hand. Is pass a logical alternative to bidding? And does the failure to alert suggest bidding on to 4S? What should the final ruling be on this hand?