Event: Silver Rook

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Opponent Rating Result
Shane Inglis 1669 1 - 0
Jonathon Day 1743 1 - 0
Robert Mitchell 1681 ½ - ½
James Annan 1825 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1830 = (6918 + 400 * (2 - 1)) / 4)

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