Event: Division 1

Opponent Rating Result
Simon Johnson 1913 1 - 0
Mike J Coffey 1864 0 - 1
James P Rothwell 1914 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1897 = (5691 + 400 * (1 - 1)) / 3)

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