Event: Worcestershire Challengers' League

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Opponent	Rating	Result
John F Varilone	1639	½ - ½
Joshua Clarke	1788	½ - ½
Joe Rastall	1700	0 - 1
Alex Eaton	0	1 - 0
Phil Maddocks	1734	1 - 0
Arnold G Kirkland	1551	½ - ½
Paul B Sharratt	1794	1 - 0
George Charman	1785	0 - 1

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

1549 = (11991 + 400 * (3 - 2)) / 8)