Event: u1850 County Championship

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Opponent	Rating	Result
Richard McMorran	1678	½ - ½
Francois Swiegers	1729	0 - 1
Joseph Grant	1629	½ - ½
Gert De Block	1654	1 - 0
Corinne Mountford	1641	1 - 0
Stephen Livermore	1659	½ - ½

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

1732 = (9990 + 400 * (2 - 1)) / 6)