Event: Division 3

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Opponent Rating Result
John C Staplehurst 1476 ½ - ½
Peter Smith 1426 1 - 0
Nigel S Lake 1455 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1586 = (4357 + 400 * (1 - 0)) / 3)

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