kenrexford, on May 30 2007, 02:50 PM, said:
First, you are still assuming that Declarer does not have the spade 10, which is a card leftie, with Ax, cannot know about, If Declarer has K10 in spades left, a spade back does not set the contract -- it assures that the contract makes.
No, and no.
I'm not assuming he doesnt have it, I'm saying he might not have it, and thus you would take your 100 % play to beat if you have Qx of spades.
And no, if you lead back a low spade and declarer DOES have the ten he is not 100 % to make it. Why is he 100 % to make it? You think he will just win the jack and ruff a heart? OK, why cant the layout be:
In this case the defense will again lead back a low spade, RHO will duck the jack, and when you lead a heart from dummy RHO will pitch. If this is the layout you must pitch a diamond from your hand, not ruff. If the honors are reversed the play would be the same and you need to ruff with the king. That is called a 50/50 guess. Your assertion that declarer is 100 % to make if he has KT is simply wrong.
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Second, leftie has not shown up with the club Queen. His lead was a third-best pip, won by rightie's 10. The second round was fourth-best, rightie playing the Jack. Now, it is true that he might have a known Queen, if the third club was ruffed with the rightie playing the Queen, but that was not specified (queen or small).
When nothing is specified that means everyone followed with small cards. But if that is not clear enough for you, Fred later specified in the thread that LHO did in fact have the club queen.
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I'll grant that the implication was that leftie has the club Queen, in which case Ax is "not possible."
ty
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However, a "losing option" might be a poor option (playing for a mistake). Playing for a mistake is better than a zero-odds play, obviously.
Why are you playing for declarer to make a mistake when you can
A) ensure a set if partner has the spade ten by leading a small spade from Hx
and

preserve a guess for declarer (so that he can still make the same mistake) by leading a spade. I guess you are confused since you think he will automatically make if you lead a small spade from Hx here.
All you do is lose the chance to beat the hand if you have Qx and partner has AT by playing a club, and you don't gain anything, not even the non-guess.