Event: Division Two

Opponent Rating Result
Jonathon Vaughan 171 ½ - ½
David Gardiner 151 ½ - ½
John E Crump 162 ½ - ½
Kenneth E Allen 137 0 - 1
Andy Ambrose 137 ½ - ½
Iain Brodie 156 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

86 = (914 + 400 * (0 - 1)) / 6)

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