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Subject: Re: DTC tablebases.

Author: José de Jesús García Ruvalcaba

Date: 12:02:31 07/16/99

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On July 16, 1999 at 14:53:53, Robert Pope wrote:

>On July 16, 1999 at 12:44:48, José de Jesús García Ruvalcaba wrote:
>
>>	I have read that Thompson's tablebases store distance to conversion (as opposed
>>to distance to mate). What is the definition of "conversion" in this context?
>>José.
>
>That would be reaching a position where a different tablebase is needed to find
>the next move to play.
>
>For example, an endgame might be played out with three conversions:
>Starting with KRPkr.
>The pawn eventually queens (into KQRkr)
>but is immediately captured by the rook (into KRkr)
>But since the Queen was guarded by the rook, RxR (into KRk)
>And then white goes on to mate.
>
>The distance to conversion is the maximum time needed to force the next simpler
>stage.

	Thank you very much! I knew that delivering mate and capturing pieces were
conversions, but I was not sure if any pawn move was a conversion or only the
pawn promotions.
José.



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