Event: Durham League Division B

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Opponent Rating Result
Stephen J Hall 1813 0 - 1
Thomas Marwood 1450 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1232 = (3263 + 400 * (0 - 2)) / 2)

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Opponent Rating Result
Oliver Belcher 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

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