Event: Silver Rook

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Opponent Rating Result
Ian D Strickland 127 1 - 0
Dean Hepworth 117 1 - 0
E Gordon Marks 142 1 - 0
Owen R Robson 154 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

535 = (540 + 400 * (4 - 0)) / 4)

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