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Why this happen?


zdedo

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[hv=pc=n&s=sqt6542had98ckqj5&w=skhj94dqj643ca843&n=s97hq872dakt5ct97&e=saj83hkt653d72c62&d=w&v=n&b=12&a=ppp1sp1np2sp3sp4sppp]399|300[/hv]

 

This hand from instant tourney

4 lead won by A

all declarers shift to dummy in

who start with 9 ROH inject J make it -1

who start with 7 Bot smashes his p K with A making life easy for declarer ?!

any one can explain or is it just a bot issue?

Thanks

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FYI this should be posted in Gib discussion forum.

 

On bidding and lead declarer is marked with 1 and 6 or 7 .

So partner has 0 or 1 . So playing anything other than 3 helps declarer. East should let declarer guess. Even playing the J on 9 is wrong if East plays small and declare plays Q East gets A & J.

Gib uses a set of hands with double dummy analysis to make decisions. with the basic bot it doesn't use enough hands and often gets things wrong. Advanced bot might do better.

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