Event: Northamptonshire Silver King League Division 1

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Opponent	Rating	Result
Joshua Morris	1770	0 - 1
Christopher Keech	1787	0 - 1
Daniel Worley	1558	1 - 0
Stellio Jerome	1586	0 - 1
Arrow Morris	1611	0 - 1
Kirk Harrison	1559	1 - 0
Arrow Morris	1623	½ - ½

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

1528 = (11494 + 400 * (2 - 4)) / 7)