Event: Division 5

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Opponent Rating Result
George Harle 1115 0 - 1
Martin D Brookes 1333 1 - 0
David Walshaw 1675 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1241 = (4123 + 400 * (1 - 2)) / 3)

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