Event: Division 2

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Opponent Rating Result
Mike J Groombridge 1667 1 - 0
Brian Homewood 1611 ½ - ½
Mike J Groombridge 1667 1 - 0
Keith Thomas 1720 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1966 = (6665 + 400 * (3 - 0)) / 4)

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