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Subject: Re: Unnecessary Underpromotions

Author: Uri Blass

Date: 11:06:30 05/22/03

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On May 22, 2003 at 13:02:05, José Carlos wrote:

<snipped>
>>Hi Uli,
>>
>>i do some kind of conditional delayed minor promotion move generation.
>>Depending on the outcome of the queen promotion, assuming the queen promotion
>>don't cuts, i omit all minor promotions or at least rook and bishop promotions.
>>
>>If the best reply of the opponent after doing the queen promotion is a capture
>>of this queen, i see no need to even generate any minor promotion, except at the
>>root and except knight promotion checks (maybe a rare double check). I also omit
>>rook and bishop promotions, if the queen promotion returns no draw (stalemate)
>>score.
>>
>>Gerd
>
>  Sounds an intelligent approach, thanks for sharing.
>
>  José C.

Not for me for the following reasons:

1)minor promotion to a knight is not needed to be generated if capturing the
promoted queen is good enough.

2)It is possible that the queen promotion is losing when the underpromotion
returns draw score(stalemate).

I simply did not consider the subject of underpromotions as important enough
at this time so I did not implement the right ideas and there are other things
that I consider as more important.

Uri



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