Event: Division 3

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Opponent Rating Result
David Griffiths 1559 0 - 1
Richard Chillcott 1744 0 - 1
Paul D Rees 1585 0 - 1
Vincent Barker 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1022 = (4888 + 400 * (1 - 3)) / 4)

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