Event: Division 2 Cup

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Opponent	Rating	Result
John Foo	1489	1 - 0
Robert A Maltby	1647	½ - ½
Thomas Goulden	1466	½ - ½

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

1667 = (4602 + 400 * (1 - 0)) / 3)