Event: Brewood Chess Circle Club Championship

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Opponent	Rating	Result
Greg Rochester	0	0 - 1
Stephen A Bird	1293	1 - 0
K Roger Grainger	1627	0 - 1
Paul Wright	1879	0 - 1

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

1000 = (4799 + 400 * (1 - 3)) / 4)