[EarlPurple]

One of the things I find most difficult with GIB is simply competing part-scores. GIB either punishes you by bidding too many, or simply fails to show you its hand, e.g. it has a long holding in a suit it doesn't tell you about.

So not sure how to export a hand here

https://www.bridgeba...DQ%7Cpc%7CDK%7C

well it didn't embed it but it gives the link to the bidding. (Any chance of making this easier or at least explaining what to do?)

Interesting the opponents have no problems "competing" and finding a spade fit, but let's go through the auction.

Firstly 1♥ is the probably the wrong bid, north should just bid his longest suit. There is a danger that partner will bid 1NT but even if you've missed a 4-4 heart fit it won't necessarily be a disaster. As it is after Dbl, support Redouble 1♠, if 1♥ can be canape then it's obvious that 2♦ at this point must show the hand perfectly and you get to either play in 2 or 3♦ or push the opponents to a higher level in spades.

If not right away, when partner re-opens with a double you know partner has 3 card heart support so what is the 3♥ nonsense? You don't need to bid to the 3 level nor fail to show partner your diamonds.

Of course trumps break 5-1 (when I end up in 4-3 fit they pretty much always do) and GIB's double-dummy analysis shows you can get out for 2 off but even that would be a disaster at MP, vulnerable in a part-score hand. Most who ended up in 3♥ went 3 off and some 4 off.

[smerriman]

EarlPurple, on 2022-July-11, 03:45, said:

well it didn't embed it but it gives the link to the bidding. (Any chance of making this easier or at least explaining what to do?)

There's a stickied thread in the BBO support forum. In brief, just type:

[hv=pasteurlhere]400|300[/hv]

GIB used to bid 1♦ in this situation but was reprogrammed at some point in the past to follow the more modern route of 1♥ which in itself I have no problem with. But many of the follow-ups that are required for this to work weren't added at the same time, and as a result it will never show its 5 card diamond suit later (or even a 9 card diamond suit) - there are quite a few bugs that have come up with this sequence.

The rest of the auction is just a result of the missing diamond logic; it considers you to have extras for doubling, it considers itself to have at most 8 HCP for not bidding anything, and thus decides it has to make some non-minimum rebid.