[thorvald]

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

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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

[johnu]

Good defense by East-West GIBs to hold the contract to 11 tricks. Lesser bots might have allowed 12 tricks.

[thorvald]

 johnu, on 2022-September-01, 16:54, said:

Good defense by East-West GIBs to hold the contract to 11 tricks. Lesser bots might have allowed 12 tricks.

Interesting that one bot found the ♥5 lead

https://www.bridgeba...ername=thorvald

[thepossum]

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