Event: Div2

Opponent Rating Result
David W Fone 137 0 - 1
Graham J Pace 119 1 - 0
Douglas Bramley 105 1 - 0
Stephen Ferris 0 1 - 0
David Smith 157 0 - 1
David Smith 160 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

180 = (678 + 400 * (3 - 2)) / 6)

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