Event: D&DCL Div 3

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Opponent	Rating	Result
Ryan Witham	1399	0 - 1
Joe Willgoose	1371	0 - 1
Tony O'Donovan	1351	0 - 1
Andy Bacon	1402	0 - 1
J Martin Gibson	1110	0 - 1
Nigel D Marshall	1461	0 - 1
Talakalukoppa Amarnath	1595	1 - 0
Robson Wandsworth	0	0 - 1

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

911 = (9689 + 400 * (1 - 7)) / 8)