Event: Hillingdon Div 3

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Opponent	Rating	Result
Ramin Tawab	1751	0 - 1
Andrew Glass	1458	½ - ½
Clive Heidrich	1746	1 - 0
Geoff Richards	1389	1 - 0
Alan R Marshall	1555	1 - 0
James Linton	1419	1 - 0
Hridik Nandi	1383	1 - 0

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

1757 = (10701 + 400 * (5 - 1)) / 7)