Event: Division 3

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Opponent Rating Result
David Gamble 1398 1 - 0
Drew Harbidge 1450 ½ - ½
Alistair Geear 1500 1 - 0
Roy J Gurney 1405 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1738 = (5753 + 400 * (3 - 0)) / 4)

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