Event: Christmas Rapidplay

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Opponent	Rating	Result
Stephen Ollis	1536	0 - 1
Tim Hind	1153	0 - 1
Freya Hind	853	0 - 1

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

781 = (3542 + 400 * (0 - 3)) / 3)