Event: Division 1

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Opponent Rating Result
Roger G Williamson 2256 0 - 1
E Dave Williams 2016 ½ - ½
Owen Crawford 2030 0 - 1
John P Redmond 2281 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1846 = (8583 + 400 * (0 - 3)) / 4)

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