Event: Durham League Division B

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Opponent Rating Result
Stephen J Hall 1855 0 - 1
Ilya Bowman 1450 1 - 0
Sebastian Palucha 1317 1 - 0
James Urwin 1388 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1703 = (6010 + 400 * (3 - 1)) / 4)

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