[Tramticket]

Part 1

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You are East, declarer in 3NT after an uncontested auction (if you prefer that west responded 1♥, that's fine, the contract and lead will be the same). Scoring is IMPs (multiple teams of eight event) and the lead is the 3♠ (2nd & 4th leads, If you try the ten at trick 1, North will play the queen).

What is your plan?

Part 2

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You are now West on the same hands, declarer in 3NT after South has made a take-out double. North leads the ♠5 (South will play the Jack if you duck).

What is your plan? Is there any difference from the previous answer?

Part 3

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Exactly the same hand and auction and opening lead as part 2. But now you are told that the take-out double "promises opening values, but doesn't promise club shortage and other suits are a minimum two-card length".

Does this additional information affect your plan?

[pescetom]

Tramticket, on 2018-November-05, 05:00, said:

Part 3

Exactly the same hand and auction and opening lead as part 2. But now you are told that the take-out double "promises opening values, but doesn't promise club shortage and other suits are a minimum two-card length".

Presumably they had to alert this double and explain when requested?
If so, as West I would have bid the same way as in an uncontested auction.
In our case hearts, so East would probably bid 2NT even if North chirped up in spades.