Event: WMA Autumn League Division 2

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Opponent	Rating	Result
Ian Ellis	1655	1 - 0
John Foxall	1660	0 - 1
Matthew Little	1562	0 - 1
Dwight Reynoldson	1600	1 - 0
Ray Sawyer	1412	0 - 1
Matthew Coldwell	1630	1 - 0
Ian Ellis	1655	1 - 0
John Foxall	1660	0 - 1
Matthew Little	1562	0 - 1
Dwight Reynoldson	1600	1 - 0
Charles Charalambous	1600	0 - 1
Ray Sawyer	1412	1 - 0
Matthew Coldwell	1630	0 - 1

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

1557 = (20638 + 400 * (6 - 7)) / 13)