Event: MCA Division 4

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Opponent	Rating	Result
Jane Reece	1598	0 - 1
Tom EC Webb	1620	1 - 0
Michael Delaney	1700	1 - 0
John Clarke	0	½ - ½
Christian Gorchev	0	½ - ½
Andrei Tamboi	1597	0 - 1
Andrew J Savage	1900	0 - 1
Jonathan Booth	1587	0 - 1

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

1150 = (10002 + 400 * (2 - 4)) / 8)