Event: Crewe Rapidplay - Division 2

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Opponent	Rating	Result
Nigel Gardner	84	1 - 0
Nigel Gardner	84	0 - 1
Reinhard Haack	70	1 - 0

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

213 = (238 + 400 * (2 - 1)) / 3)