Event: Durham League Division B

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Opponent Rating Result
Bryan J Bainbridge 1533 1 - 0
Raj Singh 0 ½ - ½
Nigel Hall 1975 0 - 1
Joe McGinnis 1543 0 - 1
Barry Edgar 1587 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1248 = (6638 + 400 * (1 - 2)) / 5)

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