Event: E (2) Division

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Opponent	Rating	Result
Sithun De Silva	1798	0 - 1
Jack Cooper	1667	1 - 0
Claire Kerton	1382	½ - ½

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

1616 = (4847 + 400 * (1 - 1)) / 3)