Event: Division A

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Opponent Rating Result
D Brett Lund 2321 1 - 0
Martin Mitchell 2255 ½ - ½
Jim Sumner 2120 0 - 1
Ben Fearnhead 1866 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2041 = (8562 + 400 * (1 - 2)) / 4)

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