Event: Durham League Division B

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Opponent Rating Result
Michael Smalley 0 1 - 0
John Reddington 1548 0 - 1
David Kelly 1593 0 - 1
Mark Temple 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

785 = (3141 + 400 * (2 - 2)) / 4)

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