Event: Division 2

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Opponent Rating Result
William Burgess 1773 0 - 1
Robert Lacey 1555 ½ - ½
Kevin N Bendall 1646 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1658 = (4974 + 400 * (1 - 1)) / 3)

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