Event: DCC

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Opponent Rating Result
Paul Brackner 121 ½ - ½
David JW Hardie 158 ½ - ½
Paul Brackner 121 ½ - ½
Geoff C Searing 154 0 - 1
Sidney A Jones 109 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-27 = (663 + 400 * (0 - 2)) / 5)

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