Event: WMA Autumn League Division 2

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Opponent	Rating	Result
Ray Sawyer	1412	0 - 1
George Mitchell	1318	1 - 0
Julie C Wilson	1705	1 - 0
Peter J R Oliver	1515	1 - 0
Colin G Vernon	1359	0 - 1
N Pither	1600	1 - 0
Wahhaab Ishaq	1284	1 - 0
Richard F Collett	1315	1 - 0
Ray Sawyer	1412	0 - 1
George Mitchell	1318	0 - 1
Julie C Wilson	1705	1 - 0
Peter J R Oliver	1515	1 - 0
Colin G Vernon	1359	0 - 1
N Pither	1600	1 - 0
Wahhaab Ishaq	1284	1 - 0
Richard F Collett	1315	1 - 0

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

1589 = (23016 + 400 * (11 - 5)) / 16)