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Nice example of the flaw in simulations


thorvald

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As robots are free today I have played some boards against three bots, and this was interesting

 

[hv=url=https://www.bridgebase.com/tools/handviewer.html?lin=st||pn|Thorvald,~~M17997ox,~~M7377cpr,~~M9686xub|md|1SQJT7HT92D8C76432,S9542H874D764CQJT,SAHKQ63DKQ953CA85,SK863HAJ5DAJT2CK9|sv|b|rh||ah|Board%207|mb|P|mb|P|mb|1D|an|Minor%20suit%20opening%20--%203+%20!D;%2011-21%20HCP;%2012-22%20total%20points%20|mb|1N|an|One%20notrump%20overcall%20--%202-5%20!C;%202-5%20!D;%202-5%20!H;%202-5%20!S;%2015+%20HCP;%2018-%20total%20points;%20stop%20in%20!D%20|mb|P|mb|P|mb|2H|an|5+%20!D;%204+%20!H;%2021-%20HCP;%2016-22%20total%20points%20|mb|P|mb|P|mb|P|pc|S3|pc|S7|pc|S9|pc|SA|pc|DQ|pc|DA|pc|D8|pc|D7|pc|SK|pc|ST|pc|S2|pc|H3|pc|DK|pc|D2|pc|C2|pc|D6|pc|D3|pc|DT|pc|H2|pc|D4|pc|SQ|pc|S4|pc|C5|pc|S8|pc|SJ|pc|S5|pc|C8|pc|S6|pc|C3|pc|CT|pc|CA|pc|C9|pc|D5|pc|DJ|pc|H9|pc|H7|pc|C4|pc|CJ|pc|H6|pc|CK|pc|D9|pc|H5|pc|HT|pc|H8|pc|C6|pc|CQ|pc|HQ|pc|HA|pc|HJ|pc|C7|pc|H4|pc|HK|]399|300[/hv]

 

North has a bidding problem and I would probably have doubled 1N, but 2 is also OK.

 

On general rules a trump lead is suggested and is actually the killing lead, but the bot decided to lead a , and tried to cash K at trick 3.

 

Now follow the play to trick 9, where I ruffed a and West underruffed with 7 - in my book denying a higher . Now follow to trick 11, where the bot in the simulation finds that partner still can have Q and ruffs with 5 - 11 tricks

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You did pique my interest enough to actually check this claim

Remarkable that finding the right lead depends on whether North is human or a bot :)

Did the bidding mean something different perhaps :)

 

But I ran a DD sim using the basic parameters on the bidding. It too used a spade lead

 

I couldn't run a sim on the human north hands :)

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