Event: IM Brown Shield

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Opponent Rating Result
Richard O Callis 1675 ½ - ½
John M Allan 1795 0 - 1
Michael Johnson 1745 0 - 1
Paul May 1853 1 - 0
Ian Gaskin 1554 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1644 = (8622 + 400 * (1 - 2)) / 5)

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