Event: IM Brown Shield

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Opponent Rating Result
Granville Boot 1814 0 - 1
Paul Salisbury 1662 0 - 1
Martin S Simmonds 1778 ½ - ½
Chris J Terrington 1536 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1598 = (6790 + 400 * (1 - 2)) / 4)

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