Event: u1850 County Championship

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Opponent Rating Result
Edward Knox 1688 ½ - ½
Matthew P Ball 1745 0 - 1
Ben Yelverton 1684 0 - 1
Peter Baddeley 1622 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1385 = (6739 + 400 * (0 - 3)) / 4)

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