Event: Division B

Opponent Rating Result
Paul N Fearnhead 106 1 - 0
Robert Tinton 124 ½ - ½
H Grundy 100 ½ - ½
Colin Wilks 113 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

311 = (443 + 400 * (2 - 0)) / 4)

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