Event: Division 1

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Opponent	Rating	Result
A Jon Griffith	1822	½ - ½
Tim M Turner	1889	0 - 1
Richard M Cowan	1955	1 - 0
Paul A Johnson	1868	½ - ½
Tim M Turner	1887	½ - ½
Michael Jackson	1885	½ - ½
Timothy Graef	1916	½ - ½
Marcus Matusiak	1461	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1885 = (14683 + 400 * (2 - 1)) / 8)