Event: D&DCL Div 1

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Opponent	Rating	Result
Andrew Townsend	1728	1 - 0
Steven J Burke	1938	½ - ½
Derek A Jarvis	1900	½ - ½

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

1989 = (5566 + 400 * (1 - 0)) / 3)