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Event: WMA Spring League Division 1

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Opponent Rating Result
Anthony Rimmington 1370 1 - 0
Marcus Walsh 1875 0 - 1
Anthony Rimmington 1370 ½ - ½
Marcus Walsh 1875 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1523 = (6490 + 400 * (1 - 2)) / 4)

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