[mgoetze]

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I, too, would have bid 5♥, if the description had not read "cue bid".

[helene_t]

GIB plays t/o doubles as guaranteeing support for all unbid suits - there is no option of a more or less random monster hand like there is when humans make take-out doubles.

So the 5♦ bid establishes a fit. South has promised 3+ and North 5+. In that context it is not unreasonable that 5♥ is explained as a cue bid.

But apparently North took it as natural.

[mgoetze]

helene_t, on 2011-August-21, 06:35, said:

GIB plays t/o doubles as guaranteeing support for all unbid suits - there is no option of a more or less random monster hand like there is when humans make take-out doubles.

I don't think this is quite true, after all simple overcalls are often limited to something like 12-18 total points. However, the descriptions never seem to reflect when GIB will accept that your hand might be something else...

[georgi]

That situation will have other meaning and respectively explanation according the new release coming soon.

South calls will show:

4♠ - strong hand with rebiddable spades
5♥ - ( if 5♦ is bidded ) - biddable hearts and rebiddable spades.

So, hopefully it will be taken as more appropriate hand by North-GIB or South-Human if auction is kind of reversed toward North, i.e West opens 3♣, North doubles, etc.

[pigpenz]

I think I might have bid 4♦ or 4♥ over 4♣
then who knows what gib would explain its next bids as