Event: calderdale 30

Opponent Rating Result
Christopher Marsden 0 ½ - ½
Jeremy Butts 0 1 - 0
Sam Giles 0 0 - 1
Alec Ward 0 0 - 1
Karim Khan 0 0 - 1
Cobus Daneel 0 0 - 1
Colin Frank 0 0 - 1
Vivien Webster 0 0 - 1
Steve Harrington 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-267 = (0 + 400 * (1 - 7)) / 9)

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