[fuburules3]

http://tinyurl.com/7fcdb2k

Seems like the bot shouldn't pass reverses if it had its bid the first time.

[calm01]

This is the classic behaviour of about 50% of bridge beginners.

At one bridge club I occasionally played at in Europe they had a simple policy about partners who passed forcing bids - they added the date of the offence and their name to a list on the club notice board. It was amazing how old the last entry was!

Of course a computer cannot be shamed, but maybe Fred can be.

[fuburules3]

I seem to remember when hovering over the bid that the reverse shows 18+ points. It seems now in hand link it only shows 21- points (unless i just can't see whole alert). I seem to remember that GIB will force to game if it thinks there are 25 total points, so here it's pass seems to indicate it doesn't think I necessarily have 18 points (it seems to be happy to pass if my range could include a GF, but is not guaranteed to).

I'm curious how GIB treats forcing bids (probably has been discussed)--I know it simulates hands and makes the bid that has highest EV, but what if bid is a forcing bid, but it determine pass is best option? In this case is there something in the code that overrides this decision?

It would be nice to know how often GIB will pass in this situation too as I would probably bid this way even if I were an ace stronger.

calm01, on 2011-December-03, 06:01, said:

This is the classic behaviour of about 50% of bridge beginners.

At one bridge club I occasionally played at in Europe they had a simple policy about partners who passed forcing bids - they added the date of the offence and their name to a list on the club notice board. It was amazing how old the last entry was!

Of course a computer cannot be shamed, but maybe Fred can be.

[georgi]

fuburules3, on 2011-December-02, 22:29, said:

http://tinyurl.com/7fcdb2k

Seems like the bot shouldn't pass reverses if it had its bid the first time.

That is improved in the next update as new treatment of reverse by opener. GIB will have new attitude as responder and respectively next round as rebid by opener after reverse which will be explained in details one of these days.

[barmar]

The strange thing is that I can't reproduce the Pass. The book bid in the current version is 4♥. After simulations, it occasionally bids something else, but never Pass.

Was the above auction using a download client? If so, I suspect it has an older bidding database that doesn't have this rule.

The next version of GIB that Georgi referred to adds Lebensohl over reverses, to allow responder to show different ranges.

[fuburules3]

barmar, on 2011-December-05, 15:55, said:

The strange thing is that I can't reproduce the Pass. The book bid in the current version is 4♥. After simulations, it occasionally bids something else, but never Pass.

Was the above auction using a download client? If so, I suspect it has an older bidding database that doesn't have this rule.

The next version of GIB that Georgi referred to adds Lebensohl over reverses, to allow responder to show different ranges.

I was using web client. It appears the auction was reproduced at a lot of other tables though:

http://bridgebase.co...name=fuburules3

[Bbradley62]

http://www.bridgebas...name=fuburules3

All 11 NorthGIBs who faced this auction passed the reverse.

[barmar]

Bbradley62, on 2011-December-05, 16:09, said:

All 11 NorthGIBs who faced this auction passed the reverse.

Strange. And this was a tourney, not MBC, so it's not download GIBs. In my test with MP, it always bid 4♥.

In any case, lots of changes are coming to reverses, so this is moot now.

[Bbradley62]

IMPs vs MP?

[barmar]

IMP I got a mix of results, but mostly 4♥. MP I only got 4♥.

But my test script isn't exhaustive, it just tries 11 different random seeds.