I recall recently a thread that discusssed what system should a beginner start on. 2 over 1 was a popular suggestion because of its simplicity.
I picked up Zel as a partner yesterday and we agreed 2 over 1 even though I guess we had better knowledge of Acol than 2/1. With my turn to bid after partner's reverse into 2♠ I was not sure of the the normal continuations. I decided that 2N was a natural invite and 3♣ would be weak. I bid 2N, partner bid 3♣. Although it was obvious to me that he took 2N as a Lebensohl type bid, to be consistent with my 2N underbid I passed. OK my bidding was consistent with partner having only about 15HCP, which with my knowledge of 2/1 is far too few to be realistic. Stupid me
Checking BBO Adv I see that 2N is used as Ingberman transfer to 3♣ and so a direct 3♣is used as a natural game force. (So apologies to Zel) However, although I can see the advantage of the use of 2N Ingberman in the sequence 1♦-1♠-2♥-2N where 3 suits have been bid naturally and responder needs to sign off in openers minor. The sequence 1♥-1N-2♠is different in that only 2 suits have been bid. Is not the situation here more analagous to a Flannery 2♦opening bid showing 5+♥and 4♠? So 1♥-1N-2♠ = Strong Flannery by opener and nebulous 6-12 by responder. In this case a response of 2N would an artificial asking bid and the the strongest available and bids of a minor suit would be weaker inviting 3NT.
Comments on this? And how do teachers of beginners handle this?
Incidentally in Acol it is interesting. 1♥-2♣-2♠(GF)-3N (nat no extras) -pass.