Event: Division 4B

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Opponent Rating Result
Freddie Pick 1807 ½ - ½
Edward Ames 1354 1 - 0
Graham Strickland 1447 ½ - ½
David Wilson 1310 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1680 = (5918 + 400 * (2 - 0)) / 4)

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