Event: Worcestershire Rapidplay league

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Opponent	Rating	Result
Antonia (Toni) T Reed	1569	0 - 1
Tomasz Grala	0	1 - 0
Julie C Wilson	1800	1 - 0
Eric Horwill	1734	1 - 0
Antonia (Toni) T Reed	1569	1 - 0
Julie C Wilson	1800	½ - ½
Tomasz Grala	0	1 - 0
Eric Horwill	1734	0 - 1

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

1426 = (10206 + 400 * (5 - 2)) / 8)