Event: Doncaster Bell Trophy

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Opponent Rating Result
Steven Devonshire 124 1 - 0
Tim Prosser 144 0 - 1
Steven Devonshire 124 ½ - ½
Tim Prosser 144 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

234 = (536 + 400 * (2 - 1)) / 4)

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