Event: Haslemere Trophy

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Opponent Rating Result
Steve Harley 1684 ½ - ½
Steve Harley 1684 0 - 1
Keith Lo 1065 1 - 0
Keith Lo 1065 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1475 = (5498 + 400 * (2 - 1)) / 4)

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