Event: u1850 County Championship

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Opponent Rating Result
Adam M Dougall 1643 0 - 1
Daniel Pugh 154 1 - 0
Gert De Block 1654 0 - 1
Joseph Grant 1629 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1270 = (5080 + 400 * (2 - 2)) / 4)

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