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Chessd is a chess XMPP based server. It uses a web interface and a BOSH server, that runs between interface and the chess server. Visit http://xadrezlivre.c3sl.ufpr.br to see it in action.
The Eight Queens Problem is a chess board puzzle. Eight queens can be placed on the chess board without conflict. Any queen placed on the chess board will not attack any other queen. JavaScript programming language is used.