Event: Division 3

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Opponent Rating Result
Tony C Norris 1633 ½ - ½
Simon Gathern 1640 1 - 0
Jeffrey Blumsom 1657 ½ - ½
Rhys Perry 1574 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1826 = (6504 + 400 * (2 - 0)) / 4)

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