Event: Division 1

Opponent Rating Result
Edgar Wilson 1979 0 - 1
Partha Mulay 2065 0 - 1
Stephen Middleton 1980 1 - 0
Malcolm P Kingsley 1886 ½ - ½
Stephen W Berkley 1723 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1847 = (9633 + 400 * (1 - 2)) / 5)

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