Event: Haslemere Trophy

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Opponent Rating Result
Harriet Haslehurst 1551 0 - 1
Steven Hall 1467 ½ - ½
Harriet Haslehurst 1551 0 - 1
Steven Hall 1467 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1309 = (6036 + 400 * (0 - 2)) / 4)

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