Event: Hillingdon Div 3

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Opponent	Rating	Result
Richard O'Neill	1636	1 - 0
Daniel Brooks	1493	0 - 1
Samuel Knight	1305	1 - 0
Jack Mills	0	1 - 0
Samuel Knight	1295	1 - 0
Alan R Marshall	1548	1 - 0
Gerry Stonehouse	1234	1 - 0

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

1502 = (8511 + 400 * (6 - 1)) / 7)