Event: 4th Cornwall Spring Open

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Opponent Rating Result
Jane Richmond 2143 0 - 1
David O Collier 1970 ½ - ½
Simon D Arnold 1941 0 - 1
Pierre Lipinsky 1813 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1867 = (7867 + 400 * (1 - 2)) / 4)

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