[wbartley]

Just play bridge robots. Human South.

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The explanation of 4♠ was, cue bid. The explanation of 5♥ was no ♣AK; no ♦AK, blah blah blah. Well, needless to say, North holding no top honors in clubs or diamonds was music to my ears.

Never mind that North DOES have the K of diamonds. But obviously, the real laugh is that I was allowed to play 6♥ undoubled with West holding four trump tricks.

[2200]

One possibility:
GIB can see sure 400, but can't be sure if doubled 6H runs to 7C, would be more than 400.

[ahydra]

Isn't it West who holds the trump tricks? Though I'm no expert, perhaps there is a way to score trump tricks with a void that I haven't learnt yet - edit: I see OP has now corrected this.

But yes, North should cue DK.

ahydra

[wbartley]

2200, on 2018-April-08, 11:26, said:

One possibility:
GIB can see sure 400, but can't be sure if doubled 6H runs to 7C, would be more than 400.

I'm guessing you're joking but 7♣ doubled, down 2 at this vulnerability is 500 and West has 2 tricks for sure against 7♣

[smerriman]

GIB really doesn't understand cuebidding It doesn't play that 4♥ denies an ace, so 5 level bids are still only showing aces, thus it has no way of denying a king - so you basically have to completely ignore descriptions like that.

As for the lack of double, well it's obviously silly, but when to double a slam isn't really something that can/should be done based on points rules which is all the free robots do. Best left to the advanced robots, who would easily get that right.