Event: Division 2

Opponent Rating Result
Maurice J Hill 150 ½ - ½
Ben Mason 143 0 - 1
John Crawley 91 0 - 1
Alan J Nelder 126 0 - 1
Trevor FW Lewis 121 1 - 0
Ben Mason 143 1 - 0
Mike Herbert 130 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

129 = (904 + 400 * (3 - 3)) / 7)

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