Event: Division 1

Opponent Rating Result
Michael J Ashworth 2105 0 - 1
A Clive Walley 1916 ½ - ½
Thomas Ash 1736 1 - 0
Matthew DJ Wilson 1952 0 - 1
Hayden Griffiths 1750 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1892 = (9459 + 400 * (2 - 2)) / 5)

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