Event: IM Brown Shield

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Opponent	Rating	Result
Jim E Vickery	1828	0 - 1
Eric Lyu	1773	0 - 1
Nathaniel Holroyd-Doveton	1699	0 - 1
Clive W Davies	1842	1 - 0
Paul W Anderson	1737	0 - 1
Andrew Zigmond	1658	½ - ½
Matt Jones	1735	1 - 0
Gerald Cuaresma	1965	½ - ½

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

1680 = (14237 + 400 * (2 - 4)) / 8)