Event: Division 2

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Opponent Rating Result
Anthony RW Brough 138 0 - 1
Sandra G Blackburn 120 ½ - ½
Nicholas PA Wright 120 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-7 = (378 + 400 * (0 - 1)) / 3)

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