Event: Christmas Rapidplay

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Opponent	Rating	Result
Tristan Green	1313	0 - 1
Joe Vera-Sanso	1135	1 - 0
Ollie Walton	1251	0 - 1

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

1100 = (3699 + 400 * (1 - 2)) / 3)