Event: Online League Season 3, Division 2

Opponent Rating Result
David Margerison 1831 0 - 1
Ian Davey 0 1 - 0
Kevin Groves 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

610 = (1831 + 400 * (1 - 1)) / 3)

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