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Event: WMA Spring League Division 2

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Opponent Rating Result
James Treasure 0 1 - 0
Steve Lenton 0 1 - 0
James Treasure 0 1 - 0
Steve Lenton 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

400 = (0 + 400 * (4 - 0)) / 4)

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