Event: Division 2

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Opponent Rating Result
Kevin A Sartain 1778 ½ - ½
David Williams 1734 0 - 1
Chris Latham 1686 ½ - ½
Gareth Ellis 1812 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1553 = (7010 + 400 * (0 - 2)) / 4)

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