Event: A Division

Opponent Rating Result
Sarah N Longson 2123 ½ - ½
Simeon Sakic 1968 0 - 1
Matthew JE Searles 1991 ½ - ½
Andrew Lewis 1903 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1896 = (7985 + 400 * (0 - 1)) / 4)

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