Event: 4-Board Division 1

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Opponent	Rating	Result
Neil Hambly	1537	½ - ½
Christopher J Harris	1481	1 - 0
Ian Scott	1557	0 - 1
Hussam Al Haidar	1517	0 - 1
Darren Tomlinson	1076	0 - 1
John Scotter	1537	½ - ½
Stuart Sharp	1405	½ - ½

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

1330 = (10110 + 400 * (1 - 3)) / 7)