Event: Hillingdon Div 3

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Opponent	Rating	Result
Arthur Cann	1502	0 - 1
Trevor Bates	1530	1 - 0
Ron Foale	1631	1 - 0
Gerry Stonehouse	1183	1 - 0
Shrushty Sawant	0	1 - 0
Gerry Stonehouse	1196	1 - 0
Nathan Lester	1318	1 - 0
Abu Hasan	1403	1 - 0

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

1520 = (9763 + 400 * (7 - 1)) / 8)