Event: A Division

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Opponent	Rating	Result
Philip Adams	2032	0 - 1
Nikolay Milchev	2241	0 - 1
Andrew I Wilson	1971	1 - 0
Robert A Newton	1965	½ - ½
Michael P Crowther	1838	0 - 1
Adam Tyton	1872	½ - ½
Andrew J Stoker	2035	1 - 0
Paul Doherty	1759	½ - ½

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

1914 = (15713 + 400 * (2 - 3)) / 8)