Event: Hepolite (Rapidplay)

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Opponent	Rating	Result
Steve Harrington	1565	0 - 1
Steve Harrington	1565	½ - ½
Ellis Howard	1460	0 - 1
Ellis Howard	1460	½ - ½
Ralph Barraclough	1700	1 - 0
Ralph Barraclough	1700	0 - 1
Phil Drury	1530	1 - 0
Phil Drury	1530	1 - 0

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

1564 = (12510 + 400 * (3 - 3)) / 8)