Event: Watkinsons League

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Opponent Rating Result
Anthony A Gilpin 1772 ½ - ½
Colin Frank 1700 ½ - ½
Isaac Fossey 1837 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1636 = (5309 + 400 * (0 - 1)) / 3)

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