Event: Durham League Division B

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Opponent Rating Result
Vaughan Davison 1622 ½ - ½
Carl Stephens 1598 ½ - ½
Kenneth Boxall 1597 0 - 1
Daniel Williams 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1204 = (4817 + 400 * (1 - 1)) / 4)

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