Event: HCA Women's Individual Championship

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Opponent	Rating	Result
Rosamund Hale	1502	1 - 0
Rose Saunders	1090	1 - 0
Helen Archer-Lock	1705	½ - ½
Megan Birch	1560	1 - 0
Rosamund Hale	1502
Rose Saunders	1078
Helen Archer-Lock	1672
Megan Birch	1559

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

1764 = (5857 + 400 * (3 - 0)) / 4)