[Mbodell]

Spots approximate, MP in good field, rotated:

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[eagles123]

♣x

[Quantumcat]

Not much point trying a spade, since partner with ♠Kxxxx (plus a jack or queen) might have found a 1♠ bid. A small club might be his ninth trick, as might a heart (if he has Kx). With a passed partner I don't think we can get five tricks by attacking so I am going to hope he only has eight and lead a passive diamond. Maybe the hand is something like:

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[Zelandakh]

Quantumcat, on 2012-September-04, 18:37, said:

Maybe the hand is something like:

If you are going to hand pick a model example to illustrate your point it might be better to choose one where the contract is not cold.

[Fluffy]

Zelandakh, on 2012-September-05, 01:44, said:

If you are going to hand pick a model example to illustrate your point it might be better to choose one where the contract overtrick is not cold.

FYP

[rhm]

Fluffy, on 2012-September-05, 02:38, said:

FYP

The critic is a bit silly.
I voted for a small club, but exchange the ♥4 with the ♥T on Quantumcat's layout and only a diamond gives the defense a chance.

Rainer Herrmann

[Zelandakh]

rhm, on 2012-September-05, 04:36, said:

I voted for a small club, but exchange the ♥4 with the ♥T on Quantumcat's layout and only a diamond gives the defense a chance.

I am not sure I understand this Rainer. You are a much better analyst than I but I cannot see where the defence has any chance whatsoever after South gets thrown in on clubs.

[rhm]

Zelandakh, on 2012-September-05, 05:07, said:

I am not sure I understand this Rainer. You are a much better analyst than I but I cannot see where the defence has any chance whatsoever after South gets thrown in on clubs.

Assume declarer cashes diamonds
In the six card ending South keeps ♠AQJ, ♥3, ♦-, ♣K3
Now a club throw-in does not work, since you have 5 tricks on a heart exit.
(On the original layout declarer could exit with the ♥K, that's why the ♥4 needs to be exchanged with the ♥T)
If declarer exits in spades he himself gets squeezed.
In both cases the scenario is the same if declarer does not cash diamonds.

Rainer Herrmann

[Quantumcat]

Zelandakh, on 2012-September-05, 01:44, said:

If you are going to hand pick a model example to illustrate your point it might be better to choose one where the contract is not cold.

I must be missing something really obvious. How is the contract cold? If declarer sets up his club can't you put partner on lead and take three spades a club and a heart?
Edit: Ok, I think I understand Rainer's post. Ignoring my stupid made up hand, for the OP, either declarer has nine tricks and I can;t see how attacking can get us to five, or he has eight, and a diamond is the card least likely to give away a trick.