Event: 2nd Yorkshire Rapidplay Championships - Major

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Opponent	Rating	Result
Paul Butterworth	1849	0 - 1
Jack Booker	1484	0 - 1
Harris Tariq	1766	1 - 0
Nigel Redmond	1639	1 - 0
M John Cawston	1860	0 - 1
Randolph E Donahue	1739	0 - 1
Bien Cuaresma	1680	½ - ½

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

1602 = (12017 + 400 * (2 - 4)) / 7)