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Subject: Re: Most Commonly Underpromoted Piece

Author: Robert Hyatt

Date: 16:01:18 02/26/06

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On February 26, 2006 at 16:08:09, Howard Exner wrote:

>Would this honor go to the Knight? Do others here agree?
>Although I've witnessed underpromotion to a Rook and Bishop these are typically
>found in composed endings.

I'd probably agree...


>
>Should a program have the knight as the second priority after the Queen?
>Is there a way to smartly implement underpromotion ?


It is really trivial to implement.  Rather than just producing one promotion
with the promotion piece set to a queen, produce 4 moves, with the promotion
piece cycling through queen, rook, bishop and finally knight.  In the q-search
you don't need the underpromotions and can avoid them there for speed.


>
>Finally, does anyone have a rook or bishop underpromotion theme from an actual
>game?


I used to have a rook promotion game played by Cray Blitz.  Promoting to a queen
would have been stalemate, but promoting to a rook resulted in a win.  I'll see
if I have the old paper file of that game around.



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