Event: Guildford Qualifier

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Opponent	Rating	Result
Umun Atara	67	0 - 1
Pat Raftery	0	1 - 0
Oscar Almadin	95	0 - 1

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

-79 = (162 + 400 * (1 - 2)) / 3)