Introducing 3 card suits as "twice rebiddable" ACBL tourney #66, board 1
Posted 2012-May-28, 09:30
Posted 2012-May-28, 10:07
Posted 2012-May-28, 10:56
In general, in situations where GIB is allowed to simulate, it's allowed to bid things within 1 card of description. So if 2h shows 4, it thinks it's OK to bid on 3. On this hand it thinks it's too strong to pass, it has to do something, but apparently double is defined wrong, probably it shows diamond length instead of strength + *spade* length. And for whatever reason it doesn't like 2nt either (or 3nt for that matter). So it can't find anything else better, and bids 2h.
Now, I don't think we really want GIB to be able to bid on 4 cd hearts here; if it had that hand it should have neg-x earlier. So 2h should probably be fixed to show at least 5, then at least it will not bid 3 cd suits here though it might bid on 4. But really fixing 2nt and double should give it better bid options.
Edit: I checked on my home GIB (old database, but some possibility of still matching current BBO GIBs), and it thinks 2nt is unusual, showing 5+ clubs and 5+ hearts! 3nt also shows unusual 3nt. This should definitely be fixed. 3nt should never be unusual IMO. And 2nt unu should only apply when partner has previously been silent.
Posted 2012-May-29, 17:26
Posted 2012-June-01, 10:24
As a result, the book bid is Pass, and uses simulations to choose between this and 2♥. They're pretty close, and 4 out of 10 MP simulations choose 2♥.