Event: 4-board Division 3

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Opponent	Rating	Result
Robert Docwra	1450	1 - 0
Nick Whetton	1586	½ - ½
William I Wright	1610	½ - ½

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

1682 = (4646 + 400 * (1 - 0)) / 3)