Event: Rapidplay - mini-league

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Opponent	Rating	Result
Cillian Nagy	88	0 - 1
Kevin Sivanesan	81	1 - 0
Kevin Sivanesan	81	1 - 0

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

217 = (250 + 400 * (2 - 1)) / 3)