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Can anyone explain this defence

#1 User is offline   thepossum 

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Posted 2021-August-04, 15:26

I appreciate maybe I knew the situation better than the bot


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#2 User is offline   LBengtsson 

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Posted 2021-August-04, 19:11

yes, I can explain. west bot does not know who has the ♣9 when east leads to second trick, so overtaking the ♣J with the A will cost a trick if south has this card. so bot blocks suit instead. which proves that if east bot lead ♣9 (4th high) at trick two, it is easiest for human to work south cards and not block suit. whether bot still blocks suit on ♣9 lead also at trick two is a guess...
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#3 User is offline   pilowsky 

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Posted 2021-August-04, 19:37

So, in sum, the bot blotted its book by not unblocking?
Fortuna Fortis Felix
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