Event: C Division

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Opponent	Rating	Result
Fiona Green	1936	1 - 0
Julian A Alderton	1736	½ - ½
Michael Tebelev	1892	0 - 1

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

1855 = (5564 + 400 * (1 - 1)) / 3)