Event: Group B

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Opponent Rating Result
David Shapland 0 0 - 1
Vivien Webster 0 0 - 1
Dave Colledge 0 1 - 0
Steve Westmoreland 0 1 - 0
Cobus Daneel 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-80 = (0 + 400 * (2 - 3)) / 5)

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