Event: NSDCA Division 2

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Opponent Rating Result
John R Booth 1869 0 - 1
Chris Riley 1938 0 - 1
David I Hulme 1772 1 - 0
Steve Whatmore 1877 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1764 = (7456 + 400 * (1 - 2)) / 4)

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