Event: Durham League Division A

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Opponent	Rating	Result
David P Mooney	2241	0 - 1
Mick Fenton	2026	0 - 1
Mike Ayton	1810	½ - ½
Jonathan Sams	1817	½ - ½
Oliver Montague	1555	0 - 1
Oliver Montague	1555	0 - 1
Richard J Harris	1790	1 - 0
Oliver Montague	1555	½ - ½
Christopher Sayers	1597	0 - 1
Richard J Harris	1790	½ - ½
Philip Brooks	1601	1 - 0

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

1649 = (19337 + 400 * (2 - 5)) / 11)