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AdvGib Response to 4NT Errors in Blackwood Bidding

#1 User is offline   richardv19 

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Posted 2025-May-21, 15:32

Today, I played in the ACBL Club 299er (robot). On bd 1, AdvGib opened, I had 17 HCP and once a suit was decided, I bid 4NT (Blackwood as indicated by the information). The AdvGib responded with 5H (2 Aces). I bid 6H. When the cards came down, there was only 1 Ace. After 2 aces were played against me, I took all remaining tricks. The AdvGib could at least respond correctly to Blackwood.
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#2 User is offline   smerriman 

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Posted 2025-May-21, 15:52

GIB plays standard Roman Keycard Blackwood - its response of 5♥ (alerted as showing 2 or 5 keycards in hearts, without the trump queen) was correct, as it held the club ace and king of trumps (which is just as crucial as an ace, which is why four-ace Blackwood is extremely rare nowadays).


A better handviewer
Reverse engineering GIB, part 1: A treatise on the insanity of bidding simulations
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