Event: A Division

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Opponent Rating Result
Michael J Creaney 1657 1 - 0
Dominic Leigh 1752 ½ - ½
Martin P McLoughlin 1820 1 - 0
Stuart McLaughlin 1597 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2007 = (6826 + 400 * (3 - 0)) / 4)

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