Quantumcat, on 2012-May-22, 23:34, said:
Don't be scared of doubling - unless you are playing against real beginners who don't know how to count to 25 HCP, then your partner must have some strength, and there is absolutely no danger in coming in. The fact that they have a fit means your side must also have a fit (but beware if they are playing Acol where they could be playing in a 4-3 spade fit). Just make sure your partner knows to bid 2NT with 2 places to play, and doesn't lazily bid 3♣ with four clubs and four diamonds, or four clubs and four hearts.
Hi Quantumcat
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I am not scared of doubling....(actually most people I played with consider me pretty aggressive bidder) and yes partner has to have the 10 HCP...but at IMP vul I also risk more than just +-100 each way. Partner is almost sure to have 4 spades, them having an 8 card fit does not guarantee one for us - 4234 is a very possible shape for him. A one that likely to convert +100 into a serious minus. Actually I would be more inclined to dbl against bad opponents than good ones, good ones will choose wisely between doubling us or competing to 3
♠ or passing. Bad ones will not doube us. At MP I would dbl without a question, non vulnerable also, but -500 is a very expensive price for -110, and -100 versus +100 is also not pretty.
At IMP vulnerable I dont risk a balanced few IMPs result of a partscore, just as at IMPs I dont double vulnerable partscores unless they surely go for -2 or more - the math makes it not worth it.
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Yu