[mr1303]

I'd like to presume the sequence 3C P 3NT. You lead some suit and dummy hits with

xx
xx
xx
AQJxxxx

You hold the following club holdings:

1) K102
2) 102
3) 1032

Assume for the sake of argument that you play standard count signals.

What card should you play from the above holdings?

[PhilKing]

1) 10
2) 10 (sometimes the 2)
3) 2

This is in the wrong section since it merely requires a knowledge of how to show a doubleton and a basic understanding of when it is safe to falsecard. Playing the ten 100% of the time on hand one is enough to protect partner's Kx on hand 2 when you need him to duck.

The "sometimes" on hand two is for hands where you have the contract beaten without the risk of a duck.

And you still haven't told us if partner held the queen of hearts.

[FrancesHinden]

PhilKing, on 2012-December-31, 05:39, said:

And you still haven't told us if partner held the queen of hearts.

No, he didn't.

[FrancesHinden]

mr1303, on 2012-December-31, 05:26, said:

I'd like to presume the sequence 3C P 3NT. You lead some suit and dummy hits with

xx
xx
xx
AQJxxxx

You hold the following club holdings:

1) K102
2) 102
3) 1032

Assume for the sake of argument that you play standard count signals.

What card should you play from the above holdings?

If you are only interested in the duck-or-win point, then there's a very easy rule in all these positions: you give true count from your small cards.

[PhilKing]

FrancesHinden, on 2012-December-31, 13:19, said:

No, he didn't.

OK - found it. Only mystery remaining is the source of declarer's 13th trick.