Event: Silver Rook

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Opponent Rating Result
John Gibbs 1675 0 - 1
Daniel Ward 1329 0 - 1
Ed Strudwick 1644 ½ - ½
John K Holliday 1641 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1272 = (6289 + 400 * (0 - 3)) / 4)

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