Event: Durham League Division B

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Opponent	Rating	Result
Chris Swales	1604	1 - 0
Deborah Edmundson	1444	1 - 0
James Garner	1602	1 - 0
Nigel Hall	1975	0 - 1
Joe McGinnis	1543	0 - 1
Robert Berry	1579	1 - 0
Josh Smith	1598	0 - 1
Jan Berssenbruegge	0	1 - 0

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

1518 = (11345 + 400 * (5 - 3)) / 8)