Event: WMA Spring League Division 1

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Opponent	Rating	Result
Ganesh Vishwanath Natraj	0	0 - 1
John Pitcher	0	0 - 1
David Smith	1615	½ - ½
Eric Gibbon	0	1 - 0
Marek J Soszynski	1890	1 - 0
Joseph Dance	0	1 - 0
Ganesh Vishwanath Natraj	0	0 - 1
John Pitcher	0	0 - 1
David Smith	1615	1 - 0
Eric Gibbon	0	0 - 1
Marek J Soszynski	1890	1 - 0
Joseph Dance	0	1 - 0

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

618 = (7010 + 400 * (6 - 5)) / 12)