Event: Rolls Royce Championship

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Opponent	Rating	Result
Jon Jenson	0	½ - ½
J Martin Gibson	0	1 - 0
Stephen G Wootton	0	½ - ½
Andrew Robins	0	0 - 1
Dylan Meyer	0	1 - 0

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

80 = (0 + 400 * (2 - 1)) / 5)