Event: Division 1

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Opponent Rating Result
Peter J Byford 1851 ½ - ½
Ian Gooding 2086 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2169 = (3937 + 400 * (1 - 0)) / 2)

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Opponent Rating Result
Mark Abrahams 1870 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1870 = (1870 + 400 * (0 - 0)) / 1)