Event: Division 2

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Opponent Rating Result
John J Grady 1620 1 - 0
Tom EC Webb 1629 ½ - ½
Jake Money 1689 1 - 0
Graeme R Solomon 1701 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1760 = (6639 + 400 * (2 - 1)) / 4)

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