Posted 2009-March-24, 12:57
1. Penalty. Not interested in playing in one of your suits at the 5-level, and too much stuff to let them play undoubled. Since it is very unlikely, on the auction, that he has a pure trump stack, he implies some high cards in both minors (with high cards in only one, he'd be afraid it was yours, and hence not likely to take tricks). So you can pull, as the 2♠ bidder with an extreme hand.. but I would expect a pass 90% of the time, or more.
2. B/I players often have trouble responding to takeout doubles, but there is a very simple 'ladder' of responses, especially if the 1-level is available, as it (mostly) is in this scenario. A 1-level advance in a major shows 0-a poor 8 count.
A jump to 2 major is non-forcing and shows a decent 8 - 10 hcp (can be fewer with a long suit). A jump to the 3-level is typically played as a very long suit, with a weak hand (which may well make game opposite a useful double with Aces and shortness in opener's suit). A jump to game shows a good long suit, an expectation of making opposite a minimumm takeout double, but no slam interest.
Notrump bids are constructive, and range from 7+-10, for 1N (or 8-10), 11-12 for 2N and full opening for 3N.
Leaving aside club bids, all other 'good' hands have to be shown via the cuebid. The cue normally shows 11+ hcp. Advancer may have his own real suit, in which case he will have a gf hand, or he may have doubt about where to play, with invitational or better values. It is customary in NA to play that the cue bid establishes a forcing auction until the partnership has either reached game or had a suit bid and raised. Thus, if doubler bids 2♥, and advancer raises, this can be passed, but if advancer were to bid, say, 2♠, this is forcing one round.
3. Traditionally, this was used as minors, but these days is far more commonly played as 2 of the unbid suits... advancer has to be careful to bid the lower of two suits in which he is interested. Thus, with, say, 3=2=5=3 shape, he advances with 3♣, not 3♦. If he bids 3♦, the 2N bidder may and should 'correct' to 3♥ when holding a club/heart 2-suiter.
4. See 3.
5. I'd open, but would appreciate that there is a significant chance that we will be outbid. I use the Rule of 15, but not when I hold a normal hand.. I use to (more or less) to determine when to open 10/11 counts.
6. One common approach, when dummy has a stiff, is to play high to suggest a switch to the higher side suit, low to suggest the lower and middle to suggest 'keep them coming'.. which is, surprisingly often, a necessary defence.
'one of the great markers of the advance of human kindness is the howls you will hear from the Men of God' Johann Hari
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