Event: Division 1

Opponent Rating Result
Andrew T Leadbetter 117 1 - 0
John M Turner 180 ½ - ½
John M Turner 180 0 - 1
David E Buxton 194 ½ - ½
Gerald Acey 193 0 - 1
David E Buxton 194 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

43 = (1058 + 400 * (1 - 3)) / 6)

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