Event: Hillingdon Div 2

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Opponent	Rating	Result
Alan R Marshall	1533	0 - 1
Martin L Loat	1624	0 - 1
David Housego	1346	1 - 0
Alastair G Johnstone	1618	1 - 0
Jim I Wrigglesworth	1443	1 - 0
Ian K Cross	1736	½ - ½

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

1617 = (9300 + 400 * (3 - 2)) / 6)