Event: Division 4

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Opponent Rating Result
Robbie Thornhill 1551 0 - 1
Michael Jennings 1485 ½ - ½
Graham Strickland 1447 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1494 = (4483 + 400 * (1 - 1)) / 3)

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