Event: Division 1

Opponent Rating Result
Alan D Lloyd 2108 1 - 0
Philip Purcell 2129 0 - 1
David R Thomas 1905 0 - 1
Philip RC Wood 1826 1 - 0
David Gardiner 1905 ½ - ½
Mark E Page 2147 0 - 1
Mark A Cundy 1972 ½ - ½
Mark E Page 2153 0 - 1
Andrew Collins 1826 1 - 0
Tom Darling 1929 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1950 = (19900 + 400 * (3 - 4)) / 10)

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