Event: John Cousens Vase

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Opponent	Rating	Result
Masha Visel	1304	1 - 0
Bayley Simpson	1253	1 - 0
Mike Jenkinson	1288	0 - 1

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

1415 = (3845 + 400 * (2 - 1)) / 3)