Event: Hillingdon Div 3

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Opponent	Rating	Result
Ron Foale	1619	0 - 1
David Housego	1379	1 - 0
Ivan Hauptman	0	0 - 1

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

866 = (2998 + 400 * (1 - 2)) / 3)