[Cyberyeti]

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Take it from here:

a) W passes
b) W bids 4♥

Scoring is IMPs

[mgoetze]

North bids 5♥, South bids 5♠, all pass.

[Zelandakh]

mgoetze, on 2015-February-21, 13:25, said:

North bids 5♥, South bids 5♠, all pass.

Is South really bidding 5♠ here with 5 key controls?

[rhm]

Zelandakh, on 2015-February-23, 04:05, said:

Is South really bidding 5♠ here with 5 key controls?

He might since doubling 3♥ should show at least game invitational values already and the ace of hearts is not particularly useful.
But I would not pass 5♠.
I follow up with 5NT (pick a slam)

Rainer Herrmann

[mgoetze]

Zelandakh, on 2015-February-23, 04:05, said:

Is South really bidding 5♠ here with 5 key controls?

In case a), where South knows 2 of those controls are worthless, definitely yes. I admit it might be harder in case b).

[the_clown]

Agree with Rainer South basically denied a double stop in hearts when he failed to bid 3N over 3♥. Its quite difficult to construct a hand consistent with the double where slam would be less than 50%. The biggest danger I can see it if the spade Ace is missing and they can take a ruff in the side suit (clubs or spades). But even if this is the case they will need to find the right lead.