Event: Division One

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Opponent Rating Result
Richard Britton 210 1 - 0
Michael W Healey 212 1 - 0
Michael W Healey 212 1 - 0
Richard Britton 210 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

511 = (844 + 400 * (3 - 0)) / 4)

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