Event: OTB Club Championship

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Opponent	Rating	Result
Omar Khan	1600	1 - 0
Stilianos Reci	1253	1 - 0
John H Hodgson	2065	0 - 1
John V Jestico	1462	1 - 0
Finbar McLoughlin	1858	1 - 0
Partha Mulay	2065	0 - 1
Peter A Nickals	1705	½ - ½

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

1830 = (12008 + 400 * (4 - 2)) / 7)