Event: Division A

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Opponent Rating Result
Barry J Hymer 178 0 - 1
John G Cooper 170 0 - 1
Phillip J Taylor 160 ½ - ½
David E Aspinall 140 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-38 = (648 + 400 * (0 - 2)) / 4)

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