Event: Durham League Division B

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Opponent Rating Result
Nathan Ekanem 1959 0 - 1
Stephen J Hall 1813 0 - 1
Stephen Carter 1572 1 - 0
Bryan J Bainbridge 1551 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1624 = (6895 + 400 * (1 - 2)) / 4)

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