Event: Worcestershire Championship League

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Opponent	Rating	Result
Kevin Hurney	2061	½ - ½
Joe Rastall	1831	½ - ½
David Waud	1731	1 - 0
Brian Turner	1972	½ - ½
Ian J Clarke	1978	½ - ½
David Spowart	1771	1 - 0
Mike Hadley	1861	1 - 0
Marcus Walsh	1938	0 - 1

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

1993 = (15143 + 400 * (3 - 1)) / 8)