Event: Hargreaves Shield

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Opponent Rating Result
David Erwee 96 0 - 1
John L Clarke 104 1 - 0
Paul Carfrae 133 0 - 1
Paul Carfrae 133 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

117 = (466 + 400 * (2 - 2)) / 4)

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