Event: Durham League Division B

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Opponent Rating Result
Nigel Hall 1947 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1547 = (1947 + 400 * (0 - 1)) / 1)

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Opponent Rating Result
Stephen Rodgers 1645 1 - 0
Mark Edmundson 1314 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1880 = (2959 + 400 * (2 - 0)) / 2)