How To UNDO a Pawn Promotion?

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Article #5685

#5685

From: Curtis Roelle
Date: Wed, 13 Jan 1993 20:49

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I have a version of GNU chess for the OS/2 Presentation Manager that I
downloaded from an FTP site somewhere.  The other night I ran it against
the native OS/2 Chess program.  The OS/2 chess was painfully slow, whild
the GNU chess (at level 29) was fast, selecting its moves within 5 secs.
PM Chess (GNU) beat OS/2 Chess silly!

But a question.  White (OS/2 Chess) had a pawn on the 7th rank.  I
accidentally advanced this pawn to the 8th rank, which produced a Queen.
When I selected UNDO to take back this move, it moved the Queen back
to the pawn's position, but neglected to change the Queen back to a pawn.
(BTW, I noticed that the OS/2 chess program has the same problem).  Is
there a "trick" to getting undo to work on a promoted piece?

Curt roelle@sigi.jhuapl.edu

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From: roelle@uars_mag.jhuapl.edu (Curtis Roelle)
Subject: How To UNDO a Pawn Promotion?
Message-ID: <roelle.726958187@uars_mag>
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Organization: Johns Hopkins University
Date: 13 Jan 93 20:49:47 GMT
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