Event: 4-Board Division 1

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Opponent	Rating	Result
Andrew D Bettley	1803	1 - 0
Luke Julyan	1665	1 - 0
John Thackray	1976	0 - 1
Keith Thompson	1792	½ - ½

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

1909 = (7236 + 400 * (2 - 1)) / 4)