Event: Division 1

Opponent Rating Result
John N Sugden 2050 ½ - ½
Laurence A Butt 1837 ½ - ½
Paul A Batchelor 1985 ½ - ½
Louis Buckland 2013 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1871 = (7885 + 400 * (0 - 1)) / 4)

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