Event: Hillingdon Div 3

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Opponent	Rating	Result
Surjit S Dhemrait	1608	0 - 1
Chris Hammonds	1147	1 - 0
Raj Parmar	1461	0 - 1
Haobo Yang	1488	1 - 0
Ashley K Anderson	1008	1 - 0
David Housego	1366	1 - 0
Ashwin Balkrishna	1382	0 - 1
Joseph Evans	1163	½ - ½

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

1378 = (10623 + 400 * (4 - 3)) / 8)