Event: Division 1

Opponent Rating Result
Philip Purcell 2100 0 - 1
Benjamin Larkin 2163 0 - 1
Danut Joian 1929 1 - 0
Bruce L Baer 2065 1 - 0
Tom Darling 1932 ½ - ½
Andrew I Paterson 2117 1 - 0
Richard Liszewski 1873 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2140 = (14179 + 400 * (4 - 2)) / 7)

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