Event: Doncaster Bell Trophy

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Opponent Rating Result
Ian Archer 50 1 - 0
Peter Catt 152 ½ - ½
Ian Archer 50 1 - 0
Peter Catt 152 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

301 = (404 + 400 * (2 - 0)) / 4)

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