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All comments by Kai-Ching Lin
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Kit, I fully agree with you that one should focus on slams and games in IMPs - I can see that your structure of 1C-1D-1M geared towards that: 4-card fit, various 3-card fit, etc.

Suppose I have a relay structure that can deal with all positive unbalanced hands in such a way that opener will be able to discover responder's exact distributuion (up to 6421 or 5521) and high-card strength (8-10 or 11-13) before the level of 3NT. (More exotic distributions or higher strengths will need to be bid above 3NT.) This relay structure only uses responder's bids of 1S and up. Consequently, we now have two bids, 1D and 1H, to handle weak (0-7) and positive balanced hands (8+ HCP). An obvious way is to use 1H for all positive balanced hands and 1D for 0-7 hands. Indeed, responder's 1H can turn around to ask for opener's distributions and high-card strength, using the same relay structure above. However, a better way, at least to me for now, is to use 1D for any 5-7 and 8+ balanced; and 1H for double negative (0-4). Balanced hands need to stay low anyway to allow opener, who can potentially be unbalanced, maximum room to show his own suits. What do you do for this sequence anyway, 1C (16+)-1D (0-7)- 1S (4+ spades)-1NT (some strength, forcing)-2C (4+ clubs)-2D (new suit)? With 5-7 HCP and long diamonds, responder should have bid 2D over 1S earlier. So, with an 8+ balanced hand, responder can now bid 2D, 3rd suit game-forcing. (2NT is available for non-forcing purpose. Or, you can swap the two.) My point is that positive balanced hands can, and probably should, be imbedded into 1C-1D, in which opener will show his suits and responder just listens and cooperates whenever necessary. You do not need a special bid, such as 1H or others, to handle positive balanced hands, where opener will also bid his suits and show his strength.

The only thing that I find unsatisfactory is that 1C-1H (double negative) preempts opener when he has a heart suit. He either has to pass 1H, which is a gamble, or bid a relatively high 2H. On the other hand, 1C-1H (0-4)-1NT can be wide range, 16-21. Opponents will have a harder time in defense. Same as with other simple suit responses.

klin
Oct. 20, 2012
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Kit, it seems that with 4M-5m (or a 3-suited hand), we Precision players need to scramble after responder's negative 1D, because there isn't much bidding space available. On the other hand, the sequence 1C-1H, naturally or artificially, already focres to game, seems to be a luxury we perhaps could not afford.

I don't have a good answer. I have tried using two negative bids, 1C-1D for semi-positive (5-7) and 1C-1H for double negative (0-4). The main advantage is that opener need not jump rebid in order to force after 1C-1D. However, the sequence, 1C-1H, preempts opener when he has hearts.

I wonder if you have comments.

klin
Oct. 20, 2012
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