Event: Division 2

Opponent Rating Result
Tom A Cleverley 1526 0 - 1
Ainsley Killey 1585 ½ - ½
Frank Jewell 1514 ½ - ½
Ronald C Andriessen 1514 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1535 = (6139 + 400 * (1 - 1)) / 4)

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