emacs20 and xemacs21 from compatibility list
;; Version: 2.0
;; Keywords: games
;; Author: John Wiegley <johnw@gnu.org>
-;; Maintainer: John Wiegley <johnw@gnu.org>
+;; Maintainer: Mario Lang <mlang@delysid.org>
;; Description: Play chess in Emacs
-;; URL: http://www.gci-net.com/~johnw/Emacs/packages/chess.tar.gz
-;; Compatibility: Emacs20, Emacs21, XEmacs21
+;; URL: http://emacs-chess.sourceforge.net/
+;; Compatibility: Emacs21
;; This file is not part of GNU Emacs.