[gwnn]

x
AQT8x
Kxx
JT8x

We open light but I decide to pass in 1st, favourable@MP's.

It goes:

p-1S-p-2S
3H-4H-p-4S
end

Partner dutifully leads the 2 of hearts and dummy mentions how useless her hand suddenly became:

Jxxx
KJxx
9xx
Q7

the T wins, declarer showing up with the singleton 7 of hearts. What should I switch to?

[whereagles]

This is hard, as there are many scenarios. Overall diamond seems like the play, though a trump might work better.

[PhantomSac]

whereagles, on 2014-September-01, 11:12, said:

This is hard, as there are many scenarios. Overall diamond seems like the play, though a trump might work better.

A trump is never necessary and is a horrible play, if declarer is 5143 then diamonds are 3-3 so he only needs one ruff, if declarer is 5134 then he again only needs one ruff.

The question is whether to play a club or a diamond. I want to play a diamond instinctively, if declarer has say AKQxxx x AJx Axx or similar a diamond is necessary to beat the hand (before he pitches a diamond on a club). If declarer is 6142 with Ax of clubs we need to play a club to (AKQxx x AJxx Ax) before the club goes away on the diamond. I'm sure I'd play a diamond, we have added chances like AKQxxx x Qxx AKx where it's right. And with 6-4 perhaps declarer would have bid 4D. But it's not like this play is guaranteed to work and I'm not sure it's the right one heh. Instinct one time!

[kuhchung]

i would've returned a diamond without any of the thought process

[gwnn]

I was about to return a diamond without the thought process but then I started the thought process and returned the ♣J (playing declarer to be 5152 I think). Declarer had

AQJTx x AJx AK9x

and should have made it now but did believe I helped her that much I guess and didn't take the club finesse and drifted 1 off.