Event: Division 3

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Opponent Rating Result
M David Rutter 1827 0 - 1
Luna Eastham 1451 ½ - ½
Roshan Amuthan 1377 0 - 1
John M McGann 1239 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1374 = (5894 + 400 * (1 - 2)) / 4)

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