Event: Worcestershire Championship

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Opponent Rating Result
Rob Sutton 0 1 - 0
Ian J Clarke 0 ½ - ½
Julie C Wilson 0 1 - 0
Joseph D Friar 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

200 = (0 + 400 * (2 - 0)) / 4)

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