Event: Division 2

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Opponent	Rating	Result
Ewan Herd	1677	½ - ½
Steve Simm	1554	1 - 0
Steve Williams	1530	1 - 0

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

1854 = (4761 + 400 * (2 - 0)) / 3)