Event: Division 2

Opponent Rating Result
Peter Dickinson 116 0 - 1
Robert Catlow 0 0 - 1
Keith Melling 112 0 - 1
Ian Mitchell 114 ½ - ½
Steven Mason 113 0 - 1
Peter Hurn 104 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-107 = (559 + 400 * (1 - 4)) / 6)

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