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Robot bidding Strange Bid

#1 User is offline   bikebum102 

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Posted 2017-March-12, 17:38

Today in a tournament I opened the bidding with 1NT - a balanced hand with 16 points. There was no intervening bid. My robot partner bid 2NT. I bid 3NT. when the robots card were revealed ait had 1 point balanced hand and 5 clubs. Is there some strange bid where 2NT over 1 NT means no points and 5 clubs with a balanced hand?
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#2 User is offline   smerriman 

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Posted 2017-March-12, 17:44

If you hover over / click on GIB's bids you can see what they mean. 2NT is not an invite to 3NT (GIB goes through Stayman with such a hand) - it is a transfer to 3♣. (I would normally expect 6 clubs for such a bid, though).

You can see the full structure over 1NT here: https://www.bridgeba...ystem_notes.php
A better handviewer
Reverse engineering GIB, part 1: A treatise on the insanity of bidding simulations
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