Event: WMA Autumn League Division 2

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Opponent	Rating	Result
Oluwole Ogeleye	1609	0 - 1
Charles Charalambous	1600	1 - 0
Julie C Wilson	1705	1 - 0
Lawrence F Hayden	1762	0 - 1
Ian Ellis	1687	0 - 1
Ray Sawyer	1412	0 - 1
Oluwole Ogeleye	1609	0 - 1
Charles Charalambous	1600	0 - 1
Julie C Wilson	1705	0 - 1
Lawrence F Hayden	1762	0 - 1
Ian Ellis	1687	0 - 1
Ray Sawyer	1412	0 - 1

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

1363 = (19550 + 400 * (2 - 10)) / 12)