Event: Division 3

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Opponent	Rating	Result
Alan R Griffiths	1848	½ - ½
Barry T Redburn	1640	½ - ½
Chris Budd	1654	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1847 = (5142 + 400 * (1 - 0)) / 3)