Bridge Base Online Help

About GIB Robots

The robots used on BBO are called GIB (Ginsberg's Intelligent Bridgeplayer.) GIB is widely considered to be one of the best computer bridge programs ever created. It is occasionally capable of brilliance. It is also occasionally capable of some really poor bids and plays (just like all human players).

Some players may find it frustrating if a particular robot partner plays especially poorly (or if a particular robot opponent plays especially well), on a given hand, but, these things will even themselves over time. We think that our robots plays at least as well as the average BBO member. In simulations, our robots currently average around 55% in a duplicate tournament setting.

Sometimes the robot does something totally crazy (don't we all.) But everyone has the same robot as partner and opponent so everyone is on a level playing field. If your GIB does something crazy, we want to know about it so we can see if it is fixable.

The GIBs used on BBO play a relatively simple and natural 2/1 bidding system. You can find out the meaning of any bid by clicking on that bid as it appears in the bidding diagram. Furthermore, when it is your turn to bid, moving your mouse over the buttons for the various possible bids will cause an explanation of the bid you are considering (as your GIB partner will understand it), to be displayed. These explanations can be somewhat cryptic, but reading them carefully before you bid will help you to avoid misunderstandings with your GIB partner.

System note explanations

You can review the GIB System notes.

As with all bidding systems, bid explanations disclose the partnership understanding of what a bid means, not what the player holds in their hand.

A bid explanation of "4-H" means "Four OR less Hearts. This does not guarantee your GIB partner or opponent has four of the suit.

A bid explanation of "4+H" means "Four OR more Hearts. This does not guarantee your GIB partner or opponent has more than four of the bid suit, but they may hold four or more of the suit.

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