The GIB robots on BBO are currently limited to the 2/1 system described below.
You can click on any of GIB's bids for a cryptic explanation.
Please drop us a line at support@bridgebase.com if you spot any errors in this document.
Overview
2/1 Game Force with 5 card majors, strong NT, strong (17+) jump shift, reasonable weak 2 bids and a strong artificial 2C.
Carding is 3/5, with what appears to be standard count and attitude signals. Gib does falsecard.
Opening bids
| 1C | could 3 if 4333. 2C response is forcing, inverted |
| 1D | usually 4 unless 4432. Opens 1D with 4-4 in the minors. 2D response is forcing, inverted |
| 1H 1S | normally show 5 in all seats. Opens 1S with 5-5 in spades and clubs. 1M-2M direct raise is not constructive. 1N response is forcing. Jacoby 2NT. Splinters. Long suit game tries (when hearts is agreed, 3C/3D = long suit game try) |
| 1N | balanced 15-17 HCP, denies a 5-card major. Stayman. Jacoby transfers. Minor suit transfers. Texas. Smolen. Lebensohl if the opps interfere. |
| 2C | strong, artificial. 22+ HCP |
| 2D 2H 2S | weak 2 bid. Disciplined, with honors in the suit |
| 2N | balanced 20-21 HCP |
Rebids
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Opening jump rebid (1c-3c for example) promises 6+ card, 17-20 HCP
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Opening major rebid does not promise 6 cards in the suit.
Competitive Auctions
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1-level overcall shows 5+; 8-17HCP; 9-19HCP. However, might overcall 1S with AQT2 in spades
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GIB uses the law of total tricks.
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Takeout doubles to 4 level
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Negative X. Responsive X. Support X (GIB may do support X with Kx).
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Weak jump overcalls (aggressive, 3-9 HCP, no allowance for vulnerability)
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Cappelletti when opponents open 1NT
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Michaels cue bid
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Unusual NT (GIB only does Unusual NT with intermediate hands, xx-KQxxxx KQxxx for example))
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Unusual versus Unusual (GIB does UVU, but doesn't alert it with this name)
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Western Cue bid (GIB doesn't alert western cue with this name)
Other conventions and treatments
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Fourth Suit Forcing
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New minor forcing
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Blackwood. GIB doesn't like to use gerber, but it will respond appropriately
Notes
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GIB is quite aggressive at the faster (weaker) settings. It likes to redouble, so careful with those sacrifices.
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Vulnerability does not affect opening/overcall decisions.
GIB seems to consider vulnerability only when thinking about leaving in a double for penalties.
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GIB does not always transfer to a major with a balanced hand and a 5 card suit.
Conventions that GIB does not play
- Drury, reverse Drury
- Gambling 3nt
- Namyats
Things GIB is supposed to play -- or is it? We can't tell
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long suit game try.
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Grand Slam Force
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Minor Suit Stayman
You might be able to learn more at the GIB website. GIB has not been updated in a while so the information is not as current as it might be.
We realize that in theory you can get GIB to play other conventions, etc. We'll get to that one of these days.
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