Event: B&DCL Div 4

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Opponent Rating Result
John Harrison 1550 0 - 1
Ken Dixon 1477 1 - 0
Simon Young 1655 1 - 0
Alex Bluffield 1400 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1521 = (6082 + 400 * (2 - 2)) / 4)

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