Event: Division A

Opponent Rating Result
Barry J Hymer 176 ½ - ½
Tom Leah 171 0 - 1
Graham J Ashcroft 163 ½ - ½
Michael L Parker 160 ½ - ½
Rob Gallagher 157 0 - 1
Carl A Tillotson 159 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

98 = (986 + 400 * (1 - 2)) / 6)

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