Event: Division Two

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Opponent Rating Result
Tim A Lane 161 0 - 1
Philip C Maybury 129 ½ - ½
Dave M Davies 159 ½ - ½
Andy Ambrose 144 ½ - ½
Eric Horwill 134 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

65 = (727 + 400 * (0 - 1)) / 5)

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