Event: Major Championship

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Opponent	Rating	Result
Anna McLoughlin	51	1 - 0
Hazel Welch	82	0 - 1
Anna McLoughlin	51	0 - 1
Tim Fox	70	0 - 1
Tim Hodgson	30	0 - 1
Gillian Morgan	70
Hazel Welch	82	0 - 1
Tim Hodgson	30
Gillian Morgan	70	0 - 1
Tim Fox	70	0 - 1

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

-237 = (506 + 400 * (1 - 7)) / 8)