Event: Richard Furness(500) League

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Opponent	Rating	Result
Nicholas A Burriss	1668	1 - 0
James Harrison	1885	0 - 1
Elliott Barnett	1650	1 - 0
Mike Fleming	1548	0 - 1
Nicholas A Burriss	1668	½ - ½
Colin Mather	1650	1 - 0
Charles Metcalfe	1653	1 - 0
Harry Newman	1323	½ - ½

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

1731 = (13045 + 400 * (4 - 2)) / 8)