Event: Division 2

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Opponent Rating Result
Dave S Almond 134 0 - 1
John Moxham 102 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-82 = (236 + 400 * (0 - 1)) / 2)

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Opponent Rating Result
Yousaf Ahmed 0 0 - 1
Peter Logan 117 ½ - ½
Peter Harrington 101 ½ - ½
Dave S Almond 134 0 - 1
Mike Woodbridge 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-10 = (352 + 400 * (1 - 2)) / 5)