Event: IM Brown Shield

Opponent Rating Result
Shamil Khadaev 1667 1 - 0
James P Collier 1852 0 - 1
Jack Howorth 1699 1 - 0
Peter Gregory 1551 1 - 0
Dominic Gallagher 1672 ½ - ½
Mark Waterhouse 1712 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1826 = (10153 + 400 * (3 - 1)) / 6)

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