[akwoo]

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(Spots approximate)

You lead the A♦; partner discourages. You switch to the 8♠, to the J and A. Declarer cashes the K♣, then leads a club to the A, dropping your QT doubleton, partner playing bottom up. Now declarer leads a heart to the K and you take your A. Do you cash your K♦ or not?

[mike777]

I will give it a try.

Yes.

Why?

I give North more than 14.
--++

Unfortunately this sort of reminds me of a hand from yesterday

Defending 4 Clubs, I paused deep in thought
Do I cash out or try and beat this.
Amazingly I came up with a third option
Which allowed declarer to make an overtrick.

[shyams]

I must be missing something.

Every "solution" I can think of works equally well OR better if East refused to take the ♥A at trick 5.

1. Perhaps North misguessed and played the ♥K from ♥KJ10x (instead of what I think North holds i.e. ♠A10x ♥KQ10x ♦Qxxx ♣Kx). OR
2. Maybe partner was forced to discourage at trick 1 due to a holding of ♦Q7. (i.e. North holds ♠A10x ♥KQJx ♦109xx ♣Kx).

[akwoo]

Without saying what works on the actual layout of the cards, I think both of you are right. Matchpoints is hard. (I was declarer by the way, but LHO who went into the tank with this problem is generally speaking a better player than I.)