Event: Richard Furness League

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Opponent	Rating	Result
Anthony Oldham	1409	0 - 1
Phil Dawson	1100	½ - ½
Tom Blackburn	1300	1 - 0

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

1270 = (3809 + 400 * (1 - 1)) / 3)