Event: Silver Rook

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Opponent Rating Result
Martin Baxter 1643 ½ - ½
David W Adam 1769 ½ - ½
Bernie T Hare 1802 ½ - ½
Aram Marsh 1593 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1802 = (6807 + 400 * (1 - 0)) / 4)

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