Event: U2000 2nd Chess Centre Rapid

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Opponent	Rating	Result
Jago Onians	1715	0 - 1
George Swanson	1658	0 - 1
Sean O McDonald	1981	0 - 1
Edmund Whelan	1598	0 - 1

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

1338 = (6952 + 400 * (0 - 4)) / 4)