Event: Division 4

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Opponent Rating Result
David S Johnson 113 0 - 1
Roger W Walker 115 0 - 1
Andrew T Leadbetter 111 0 - 1
Richard P Cantliff 126 0 - 1
Douglas J Barnett 128 ½ - ½
Roger W Walker 115 ½ - ½
Julian P Cook 90 ½ - ½
Grenville Cross 107 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-37 = (905 + 400 * (1 - 4)) / 8)

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