Event: Division 1

Opponent Rating Result
Eric Mansfield 108 1 - 0
Paul Morgan 0 ½ - ½
Robert Grounds 68 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

325 = (176 + 400 * (2 - 0)) / 3)

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Opponent Rating Result
David Malcolm Innes 128 0 - 1
M Bridges 95 0 - 1
Ian Williamson 137 ½ - ½
A Rajski 111 ½ - ½
Jonathan Howarth 113 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-43 = (584 + 400 * (0 - 2)) / 5)