Joe_Old, on 2017-January-26, 17:36, said:
I know robots can't be trusted, but the GIB bidding system itself was set up by a respected world class player. I "forget" the name.
I don't know if there was a world class player involved in setting up GIB bidding, but the developer Ginsberg wasn't a world class player. Even if there was a player involved that was world class, they may have played an eccentric, non-standard system, and I seriously doubt that they were involved in much more than opening bids and overcalls, first responses, opener rebids, and some 2nd round responder bids. The number of possible bids as you get into responders' 2nd bids and openers' 3rd bids start to get way out of hand. Some developer either filled in the missing bids, or developed an algorithm to find a reasonable bid.
As an example, when you bid a game in a competitive auction when partner hasn't shown much of anything and you see that GIB thinks you have 25-30 points. This may be a sacrifice, a 2 way bid, or a value bid hoping partner will put down a decent hand. No way a world class (or expert, intermediate, or even most beginners) would specify that GIB interpret that bid as 25-30. Other times, a bid is undefined in the bidding matrix and GIB passes out of the blue. These aren't designed as part of the system, they are bugs.