Event: Division B

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Opponent Rating Result
H Grundy 100 ½ - ½
Peter Wallace 92 1 - 0
Graham Taylor 110 ½ - ½
Dave C Hartley 98 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

300 = (400 + 400 * (2 - 0)) / 4)

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