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This item is a contest or tournament
It belongs to categories: Orthodox chess, 
It was last modified on: 2004-03-10
 Author: Hans L. Bodlaender. Contest: the 9 Queens Problem. Put 9 queens and 1 or 2 pawns such that queens do not see each other. Send your solution before Feb 29, and win a book![All Comments] [Add Comment or Rating]
David Paulowich wrote on 2007-04-24 UTCGood ★★★★
The following diagram shows 9 queens on a 9x9 board:

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 x . . . . . . . .
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 . x . . . . . . .
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 . . x . . . . . .