Event: Worcestershire Championship League

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Opponent Rating Result
Nam Anh Nguyen 0 1 - 0
Mark Bethel 1795 0 - 1
Mark Bethel 1795 0 - 1
James Allsopp 1491 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1170 = (5081 + 400 * (1 - 2)) / 4)

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