Event: Div3

Opponent Rating Result
Stephen G Wootton 121 0 - 1
Douglas Bramley 103 1 - 0
Mohinderpal Samra 87 0 - 1
Roger W Walker 115 1 - 0
Michael Moon 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

85 = (426 + 400 * (2 - 2)) / 5)

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