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Effect of random number seed

#1 User is offline   1eyedjack 

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Posted 2013-November-23, 04:06

Not really suggesting any action, but I just thought that this was an interesting obversation. We know that in a robot tourney (other than in an Instant tourney) the robot will behave identically at different tables given identical information. The following hand came from an IMP robot tourney, best hand South, not Instant.

The bidding and play up to the conclusion of trick 5 was identical at the two tables shown below except for the order in which South plays AK at tricks 1 and 2. By trick 3 the entire count of is revealed. Furthermore we are assured that GIB does not play any signals in this situation for that ordering to convey any message. Yet on the strength of this, GIB West chooses different paths at trick 6.

It is just a curiosity, really. I suppose that it is reasonable for the route to get to a particular end position would be relevant in choosing a random number seed for simulations in later play. In this case it rather randomises the results, but perhaps it cannot be helped.




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