Event: Minor - U1600

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Opponent	Rating	Result
Andy S Carter	1435	½ - ½
Ben Horspool	1536	0 - 1
Guy I Closs	1433	½ - ½
Chris Brown	1394	0 - 1

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

1250 = (5798 + 400 * (0 - 2)) / 4)