Why am I still debating this? I mean, I admit that it's marginal, and I might not do it against stronger opponents.
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1. The honours do not combine: Queens should be promoted when combined with other honours, demoted when not.
Well, sure. But they didn't open a diamond, they opened a club. I have AJxx sitting over opener. That's a nice combo to have, especially since if I take the contract at 1NT that's the most likely lead.
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2. The stiff A of spades is grossly over-valued due to its being singleton...consider Qxxx opposite Ax and Qxxx opposite stiff Ace, and you, on play need two tricks from the suit... how do you rate your chances.... any difference observable to you?
Sure, in one case they have 7 cards that'll end up being discards when I don't play spades, and in the other they have 8. If I have A across Qxxx, that's only 5 of our cards. I have 3 other suits to develop. I don't know what the odds are for actually needing to play the spades myself, but it seems slim. If they're going to end up trying to develop spades, I don't see a big difference here.
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3. The stiff spade, even tho it is the Ace, will mislead partner, often fatally, in terms of competing in spades
Eh. Sometimes xx is better, sometimes A singleton is better. I think it's actually more likely to mislead partner in terms of competing in hearts.
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4. 4441 hands are (deservedly) notorious for playing beneath their apparent weight.
True, but I'm not adding points for distribution, either via Goren or LTC. I don't think this hand is better than the same hand with a small spade instead of a small diamond. I just don't think it's worse.
For #5, the missing spot cards? Can't argue with that one. Or #6, it's IMPs- it's a much better bid in MPs.
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I notice that almost all intermediate players, and many advanced players, seem to feel that they HAVE to overcall (or double) whenever they hold an opening hand.
True. You plan to sit this one out? 1
♣-P-1NT-P-P-? 1
♣-P-1
♠-P-2
♠-?
If I had a point less, if I had fewer controls and more quacks, sure, I'd pass both of those.
But if I'm coming in, I want to come in NOW.
1. My methods are much stronger (especially for finding game) when we overcall 1NT than when we do some second round 'do something partner' X. Game is very possible here, but I'm not going to find if I wait until I'm Xing 2
♠.
2. 1NT over 1
♣ has a much stronger pre-emptive effect than waiting. They may miss game or a fit as a result. We're removing almost a full level of bidding here, and opener has shown very little about his hand. It's not like bidding 1NT over 1
♥.
3. It's very possible that I can shut the opponents out at the 1NT or 2 level if I call now, while if I wait we're almost certain to be competing to the three level.
4. Defense. Wow, do I have defense. God help me if my partner sacrifices over an unmakable bid because he couldn't imagine that I had 3 defensive tricks.
5. If partner does have 5+ spades, he's probably going to say them anyways. Suppose the auction goes, say....
1
♣-P-1
♦-1
♠-2
♦.
Maybe you have a great bid to show your hand now. I sure don't. How do you tell partner that you want to be in 3NT if he has a full 10 hcp overcall, but even 2
♠ is too high if he was just putting in a free lead director across a passed hand?
I dunno. This isn't something I feel strongly about.
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(not to mention the destruction you wreak on partner when he sees your hand in some spade contract)
Oh, if you wouldn't bid 1NT with the same hand with the QJTx of diamonds instead of Qxxx, well, then it's moot. You don't overcall 1NT with 4441 and a singleton ace, then you don't, and that's final. Making a bid like this isn't worth violating partnership harmony.
But if you do overcall 1NT with a singleton honor, and I think most people do, then this isn't a question of partnership trust. I don't think your partner's going to go nuts because it might be a hair too weak, especially in a spade contract.