Event: Division A

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Opponent Rating Result
David E Aspinall 140 ½ - ½
Maryna McKeown 100 ½ - ½
Paul N Fearnhead 106 ½ - ½
Cliff H Rutlidge 154 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

125 = (500 + 400 * (0 - 0)) / 4)

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