Event: Hargreaves Shield

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Opponent Rating Result
Harry J Sharples 1777 ½ - ½
Andy Flood 1638 0 - 1
Paul Carfrae 1747 1 - 0
Michael H Micklethwaite 1675 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1809 = (6837 + 400 * (2 - 1)) / 4)

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