straube Posted May 31, 2016 Report Share Posted May 31, 2016 After 1C (strong) 1N (5-9 with 5H, 0-3S, 0-4C) 2D (minimum, 5+S, 2H) responder has the following rebids 2H-to play2S-to play2N-GI, possibly 2 spades3C-artificial GF (can't have 5 clubs)3D-5D, GF3H-inv3S-inv3N-to play4M-to play We need an artificial GF (I think) primarily to check for a 6-2 spade fit and otherwise to allow opener to play 3N. The problem with this structure is that it wrongsides major suit contracts. This can't be helped at the 2-level.Transfers would be easy to add for the 4-level. How could we use transfers at the 3-level? 3C-transfer?3D-transfer3H-transfer3S-2S, COG?3N-0-1S? Anything better? Quote Link to comment Share on other sites More sharing options...
nullve Posted May 31, 2016 Report Share Posted May 31, 2016 Why not play 2N as ART GF? Quote Link to comment Share on other sites More sharing options...
straube Posted May 31, 2016 Author Report Share Posted May 31, 2016 Why not play 2N as ART GF? Well we could, but it's useful as invitational. Our general rule is that 2N is misfitting (to play) unless we are removing from a known 5-2 fit or 6-? contract in which case it is invitational. Quote Link to comment Share on other sites More sharing options...
awm Posted May 31, 2016 Report Share Posted May 31, 2016 I don't think you need responder to invite without extra shape in this auction. He has basically already invited by showing 5+ points opposite a strong club. If you really need to further refine the 5-7 range, opener can ask. So you can do something like: 2♥ = 5-7 less than two spades2♠ = 5-7 two spades2NT = GF not 5/5, not 6♥, not 3♠3♣ = GF 6+♥3♦ = GF 5/53♥ = 5-7 at least six good hearts3♠ = 3♠ but very minimum3NT = 3♠-5♥-(32) GF4m = shortness with 3♠ After 1♣-1NT-2♦-2M, responder is limited to 5-7 and opener has 16-18 (maybe 19? but not 20, which would clearly GF). If opener has a very good 18 (or 19?) and wants to be in game opposite 6+ to 7 he can take another call here (usually 2NT, but other natural calls are okay on shapely hands). This changes the hands where you end up higher than 2M (instead of responder 7 and opener 16, you have responder 5 and opener 18) but it seems likely to work out okay. Quote Link to comment Share on other sites More sharing options...
awm Posted May 31, 2016 Report Share Posted May 31, 2016 Hmm another sort of odd theoretical point: Suppose that in general you have two limited hands where game is in the picture. You need to get to game when both hands are maximum, but you want to avoid landing in a declined invitation (which puts you a level higher, or in a slightly worse strain, or something). Who should invite when they are max for the range? In general the more skewed point totals are less likely. So for example 18-5 is less common than 16-7, which is less common than 14-9, etc. This being the case, it is better to let the stronger hand make the decision to invite when he is at the top of this range. This is because the weaker hand is more likely to be at the top of his range than the stronger hand, and therefore when the stronger hand invites, you will invite less often (but still reach the same games assuming you need both to be max for game to be on). Quote Link to comment Share on other sites More sharing options...
straube Posted May 31, 2016 Author Report Share Posted May 31, 2016 That's an interesting point. I like your structure and I take nullve's and your point about 2N not being needed as invitational. Maybe... 2N-invitational+ hearts3C-invitational+ diamonds3D-artificial GF, 2 spades3H-invitational+ spades3S-artificial GF, 0-1 spades Idk. Rightsiding is such a frequent issue and diamonds and invites to 3N haven't been. Very frequent 2D-3H and 2D-4H auctions. Quote Link to comment Share on other sites More sharing options...
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